If no one on your team ran a backup or a scan on Dec 21, 2021, the file is likely an "artifact" left behind by an automated bot.
Do you have a or source location for this file that you’d like me to analyze further? 1640127522-1.zip
Ensure your web server isn't allowing execution in directories where users can upload files. Final Verdict If no one on your team ran a
Run the file through VirusTotal . If it’s a known exploit kit or a common web shell (like China Chopper), it will likely already be flagged by various engines. Final Verdict Run the file through VirusTotal
If you’re a sysadmin or a security researcher, you know the feeling of scanning through access logs and finding a string that looks like a cat walked across a keyboard. Recently, the filename has surfaced in various security contexts.