While FSG is a classic tool for executable compression, it is largely superseded by more robust solutions:
The decompression stub is extremely lightweight, making it ideal for small executables where every byte counts.
FSG is renowned for its speed and its ability to achieve high compression ratios for tiny assembly demos and small utilities. While its primary legitimate use was for reducing disk footprint, it became widely known in the cybersecurity community due to its frequent use by malware authors to obfuscate malicious code and evade signature-based antivirus detection. Key Features of FSG
Optimized for speed, ensuring minimal delay during program startup.