23331.7z

These files support AES-256 encryption, spanning (splitting one large file into smaller parts), and can contain any number of files or folders. How to Open It

This indicates the file is a 7-Zip compressed archive . 23331.7z

If you did not expect to receive a file named 23331.7z , exercise caution. Compressed archives are frequently used to bypass basic email filters to deliver malware. Always before extracting the contents. These files support AES-256 encryption

It uses the Lempel-Ziv-Markov chain algorithm (LZMA), which typically offers higher compression ratios than standard .zip files. open-source utility for this format.

The official, free, open-source utility for this format.