NXcrypt is a polymorphic 'python backdoors' crypter. The output is fully undetectable .
NXcrypt can inject malicious python file into a normal file with multi-threading system .
Run it with superuser's permissions .
NXcrypt output is Fully undetectable .

Usage :

• sudo ./NXcrypt.py --file=backdoor.py --output=output_backdoor.py # encrypt backdoor.py and output file is output_backdoor.py
• sudo ./NXcrypt.py --file=shell.py # encrypt shell.py and default output file is backdoor.py but you can edit it in source code
• sudo ./NXcrypt.py --help # NXcrypt help
• sudo ./NXcrypt.py --backdoor-file=payload.py --file=test.py --output=hacked.py # inject payload.py with test.py into hacked.py with multi-threading system

How it work ?

• Encryption module :

• NXcrypt add some junkcode .
• NXcrypt use a python internal module 'py_compile' who compile the code into bytecode to a .pyc file .
• NXcrypt convert .pyc file into normal .py file .
• And in this way we can obfuscate the code
• The md5sum will change too

• Injection module :

• it inject a malicious python file into a normal file with multi-threading system .

Test with Virustotal

Video Tutorial