Security researchers at Check Point Research recently identified a malicious update.7z archive used in targeted attacks. This specific version contained a legitimate 7z.exe binary alongside a malicious DLL ( iscsiexe.dll ) used for post-compromise activities. File Identification & Safety
Official scripts for Comodo Client - Security use a file named update.7z hosted on their servers to deliver binary updates to Windows systems.
Application binaries, DLLs, configuration data, or license files Update.7z
A .7z file is a compressed archive created with 7-Zip or other compatible tools. It uses the LZMA/LZMA2 compression algorithms, known for high compression ratios. In most contexts, "Update.7z" is a temporary file downloaded by an application's built-in updater.
If you have encountered an "Update.7z" file and are unsure of its origin, follow these steps to verify it: If you have encountered an "Update
Legitimate update binaries inside the archive are often digitally signed by the software vendor.
Given that attackers use this generic name to hide malicious payloads, always scan the file with an antivirus or upload it to a service like VirusTotal before attempting to open it. Update.7z
Some software like the PCSX2 emulator uses update.7z as a staging file during its auto-update process. Users have reported bugs where this file remains in the application directory even after the update is complete.