CrazyCrypt Ransomware
CrazyCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Crazy NotDharma.
Quick facts
How CrazyCrypt ransomware works
File encryption patterns
CrazyCrypt modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, CrazyCrypt displays ransom notes demanding payment for file recovery:
notes/FILES ENCRYPTED.txt
notes/note.txt
Technical indicators
Associated executable files
The following executable files are associated with CrazyCrypt ransomware:
- user.exe
- Shockwave.exe
- CrazyCrypt.exe
About this analysis
This CrazyCrypt 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 CrazyCrypt.
Last updated: December 30, 2025
Elastio detects CrazyCrypt inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify CrazyCrypt 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