: The contents are almost certainly designed to execute malicious code on your machine.
: In many 2021-era malware campaigns (like those involving Emotet or Qakbot ), .7z archives were used to bypass email filters that weren't yet scanning 7-Zip formats as aggressively as standard .zip files. 20210219.7z
While the exact "feature" depends on the specific security report or challenge you are looking at, it typically involves one of the following: : The contents are almost certainly designed to