sgn ☆

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Description:
Shikata ga nai (仕方がない) encoder ported into go with several improvements

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Security

Tags: security pentesting shellcode obfuscation red-team

Install: brew install sgn

About:
Sgn is a Go implementation of the Shikata ga nai polymorphic encoder, a staple in shellcode obfuscation. It provides a robust method for generating encoded payloads that evade static signature detection, making it a valuable tool for security professionals. The Go port offers improved performance and cross-platform compilation compared to the original C-based versions.

Key Features:

Polymorphic encoding engine to bypass antivirus signatures
Go-based implementation for modern performance and portability
Generates decoder stubs dynamically for shellcode obfuscation
Useful for red teaming and penetration testing workflows

Use Cases:

Obfuscating shellcode payloads for penetration testing engagements
Bypassing static analysis and signature-based detection mechanisms
Generating polymorphic encoders for custom exploit development

Alternatives:

msfvenom – Part of the Metasploit Framework, includes a wider variety of encoders and payload formats but is heavier.
Donut – Specializes in converting executables and .NET assemblies into shellcode, focusing on in-memory execution rather than just encoding.

Version History

Detected	Version	Rev	Change	Commit
Sep 15, 2025 10:57pm		0	VERSION_BUMP	d3f55d41
Sep 14, 2024 7:04pm		0	VERSION_BUMP	88900fe3