Del-fact.7z
Copy the file to a write-blocked forensic device. Compute its hash (SHA-256 preferred). Example:
sha256sum del-fact.7z > del-fact.7z.hash
No single authoritative source defines del-fact.7z, but three dominant origin theories have emerged from forensic case studies.
If you encounter del-fact.7z on your system, do not double-click it. Treat it as potentially sensitive or malicious. Follow this forensic workflow: del-fact.7z
If you can guess one file originally inside the archive (e.g., from a system backup), you may attempt a known-plaintext attack using tools like pkcrack, but this is ineffective against AES-256 used by 7-Zip.
Sizes of del-fact.7z across public reports show a bimodal distribution: Copy the file to a write-blocked forensic device
More alarmingly, multiple threat intelligence feeds (notably ReversingLabs and ANY.RUN) have flagged del-fact.7z as a recurring filename in living-off-the-land (LotL) attacks. Here’s how it works:
The name itself becomes a form of "conceptual camouflage"—an administrator seeing del-fact.7z might assume it’s old factorial benchmark data or a pending deletion marker, ignoring it. No single authoritative source defines del-fact
Based on common operations with archive files, here are some feature ideas:
