// Polymorphic Shellcode Engine Masterclass
An asmjit-based polymorphic encryptor for shellcode, PE files, and COFF files. Shoggoth generates unique position-independent output each time by chaining random encryption operations with dynamically assembled decoder stubs — defeating static signatures through true polymorphism. By frkngksl.
Static signatures, YARA rules, pattern matching, and why simple encoding or single-key encryption is never enough to evade modern detection.
02 BeginnerWhat polymorphism means in malware, metamorphic vs polymorphic, historical virus engines, and the core principles behind self-mutating code.
03 BeginnerWhat asmjit is, JIT assembly in C++, CodeHolder and x86::Assembler APIs, and why runtime code generation is perfect for dynamic stub creation.
04 IntermediateThe encoder pipeline from input to encrypted PIC blob: payload ingestion, loader merging, encryption stages, stub generation, and the three output modes.
05 IntermediateTwo-stage encryption: RC4 stream cipher and random block cipher with XOR, ADD, SUB, ROL, ROR, NOT, NEG, INC, DEC operations and random key generation.
06 Intermediateasmjit emitting x86/x64 instructions, register randomization, building the RC4 and block cipher decryption stubs, and how each invocation produces unique machine code.
07 AdvancedDead code insertion, opaque predicates, register shuffling, jump-over blocks, fake function calls, and recursive garbage generation strategies.
08 AdvancedPIC output structure, COFF/PE wrapping, entropy analysis, emulation-based detection, and comparison with Veil, msfvenom, and other encoder frameworks.
github.com/frkngksl/Shoggothgithub.com/asmjit/asmjitgithub.com/Veil-Framework/Veildocs.metasploit.com/docs/using-metasploit/basics/how-to-use-msfvenom.htmlen.wikipedia.org/wiki/RC4"The Evolution of Polymorphic Virus Engines" (VB Conference Papers)virustotal.github.io/yaraIntel Software Developer Manuals, Volume 2