Ransomware Research
Crypt0 Ransomware
Crypt0 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Crypt0
- First Seen
- September 1, 2016
How Crypt0 Ransomware Works
Targeted Files
Insert infix 7-zip.chm -> 7-zip_crypt0.chm
Ransom Note and Payment Demands
After encrypting files, Crypt0 displays ransom notes demanding payment for file recovery:
HELP_DECRYPT.TXT
Ransom message:
notes/HELP_DECRYPT.TXT
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with Crypt0 ransomware:
crypt0-Encrypt.exe
CryptXXX.exe
1212
RANSOMWARE
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About This Analysis
This Crypt0 ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Crypt0.
Last updated: July 30, 2025