The 7z format, created by Igor Pavlov, is the foundation of these files. Its design is modular and supports advanced features that, while useful, can be exploited: : Uses LZMA/LZMA2 for high compression ratios.
: Attackers use lookalike websites (e.g., 7zip[.]com instead of the legitimate 7-zip.org) to trick users into downloading a weaponized installer. doit.7z
: Treats multiple files as a single stream to improve efficiency, though this can complicate selective scanning by some antivirus engines. Recent Vulnerabilities (2025–2026) The 7z format, created by Igor Pavlov, is