subsigsdump

subsigsdump is a command-line utility designed to extract digital signatures from executable files. It is primarily used in cybersecurity and digital forensics to analyze the authenticity and integrity of software. The tool allows users to examine embedded signature information, which can include details about the issuer, the signing certificate, and the timestamp of the signature. This information is crucial for verifying that a file has not been tampered with since it was signed by its original developer or publisher.

The process typically involves specifying the path to the executable file as an argument to the subsigsdump command. The utility then parses the file's structure, looking for sections that contain digital signature data. Once found, it decodes this data and presents it in a human-readable format. Common output includes the subject name of the certificate, the issuer name, the serial number, and the validity period of the certificate. It can also reveal information about the hashing algorithm used during the signing process.

subsigsdump is often employed by security researchers to investigate malware or to validate legitimate software. By comparing the extracted signature information with known trusted sources, one can determine if a file is genuine or potentially malicious. The tool's simplicity and focus on signature extraction make it a valuable component in the toolkit for anyone needing to perform in-depth analysis of executable files.