Ransomware Research
Cincoo Ransomware
Cincoo is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2021, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Cincoo
- First Seen
- December 1, 2021
How Cincoo Ransomware Works
Targeted Files
Found info about ransom note README.txt but not found in tests (executable crashes after encryption)
File Encryption Patterns
Cincoo modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
._encRansom Note and Payment Demands
After encrypting files, Cincoo displays ransom notes demanding payment for file recovery:
README.txtRansom message:
notes/README.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with Cincoo ransomware:
Cincoo.exe
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About This Analysis
This Cincoo 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 Cincoo.
Last updated: July 30, 2025