SigThief
SigThief extracts digital signatures from signed PE files and appends them to other files to create invalid signatures for testing Anti-Virus detection mechanisms.
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.
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.
No core features are listed for this product yet, so check the vendor's documentation for the full feature list.
No integrations are listed for this product yet. Check the vendor's documentation, or ask the vendor which integrations and APIs it supports.
Common questions about SigThief: features, pricing and alternatives.
SigThief is a product in the Red-Team & Adversary Emulation category. It covers PE File, Binary Analysis and Executable Analysis.
SigThief is free. Download and setup instructions are at https://github.com/secretsquirrel/SigThief/.
Alternatives to SigThief listed on CybersecTools:
Compare all SigThief alternatives at https://cybersectools.com/alternatives/sigthief
SigThief is available as on-premises software. It is listed for mid-market companies and enterprises. It is free.
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