3301 Ransomware
3301 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick facts
How 3301 ransomware works
File encryption patterns
3301 modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, 3301 displays ransom notes demanding payment for file recovery:
notes/DECRYPT_MY_FILES.HTML
notes/wl.bmp
Technical indicators
Associated executable files
The following executable files are associated with 3301 ransomware:
- Alone2.exe
About this analysis
This 3301 ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like 3301.
Last updated: December 30, 2025
Elastio detects 3301 inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify 3301 across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
Recent ransomware
Explore other threats in our database