# SigThief

SigThief is a Red-Team & Adversary Emulation product. It runs on-premises. Pricing is free.

SigThief extracts digital signatures from signed PE files and appends them to other files to create invalid signatures for testing Anti-Virus detection mechanisms.

Checked October 2026.

## What is SigThief?

SigThief is a security testing tool that extracts digital signatures from signed Portable Executable (PE) files and appends them to other files.

The tool creates files with invalid signatures by copying signature data from legitimate signed executables to unsigned or different files. This process results in files that appear to have digital signatures but fail cryptographic validation.

SigThief is designed to test how different Anti-Virus engines handle signature validation and prioritization. Security professionals use it to identify inconsistencies in AV signature checking mechanisms and evaluate detection capabilities.

The tool operates by parsing the signature data from source PE files and transferring this information to target files, maintaining the signature structure while breaking the cryptographic chain of trust.

SigThief supports testing scenarios where researchers need to understand how security products respond to files with manipulated or invalid digital signatures.

Tags: PE File, Binary Analysis, Executable Analysis, Evasion, Windows, Signature

## Quick facts

- Category: [Offensive Security](https://cybersectools.com/categories/offensive-security-testing) · [Red-Team & Adversary Emulation](https://cybersectools.com/categories/offensive-security)
- Deployment: On-Premises
- Company size fit: Mid-Market, Enterprise
- Pricing model: Free
- GitHub stars: 2,290
- Website: github.com

## SigThief FAQ

### What is SigThief?

SigThief is a product in the Red-Team & Adversary Emulation category. It covers PE File, Binary Analysis and Executable Analysis.

### What is the pricing for SigThief?

SigThief is free. Download and setup instructions are at https://github.com/secretsquirrel/SigThief/.

### What are alternatives to SigThief?

Alternatives to SigThief listed on CybersecTools:

1. [Fortra Cobalt Strike](https://cybersectools.com/tools/fortra-cobalt-strike) - Threat emulation product for adversary simulations and red team operations (Commercial)
2. [Core Security Cobalt Strike](https://cybersectools.com/tools/core-security-cobalt-strike) - Post-exploitation threat emulation platform for red team operations. (Commercial)
3. [Trickest Attack Surface Management](https://cybersectools.com/tools/trickest-attack-surface-management) - Platform for offensive security operations including ASM, VA, and DAST (Commercial)
4. [GoSecure Titan® Adversarial Simulation](https://cybersectools.com/tools/gosecure-titanr-adversarial-simulation) - Human-led adversary emulation service testing detection & response capabilities (Commercial)
5. [Dreadnode Offensive Security Agents](https://cybersectools.com/tools/dreadnode-offensive-security-agents) - AI agent platform for automating offensive security operations and evals. (Commercial)

Compare all SigThief alternatives at [https://cybersectools.com/alternatives/sigthief](https://cybersectools.com/alternatives/sigthief)

### What deployment and organization size does SigThief fit?

SigThief is available as on-premises software. It is listed for mid-market companies and enterprises. It is free.

## Compare SigThief with similar solutions

- [SigThief vs Fortra Cobalt Strike](https://cybersectools.com/compare/fortra-cobalt-strike-vs-sigthief)
- [SigThief vs Core Security Cobalt Strike](https://cybersectools.com/compare/core-security-cobalt-strike-vs-sigthief)
- [SigThief vs Trickest Attack Surface Management](https://cybersectools.com/compare/sigthief-vs-trickest-attack-surface-management)

All alternatives to SigThief: [/alternatives/sigthief](https://cybersectools.com/alternatives/sigthief)

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Source: https://cybersectools.com/tools/sigthief

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