Ransomware Research
KCW Ransomware
KCW is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2018, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- KCW
- First Seen
- April 1, 2018
How KCW Ransomware Works
Targeted Files
NOSAMPLE For web-servers
File Encryption Patterns
KCW modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..kcwencRansom Note and Payment Demands
After encrypting files, KCW displays ransom notes demanding payment for file recovery:
kcwdecrypt.phpRansom message:
notes/kcwdecrypt.php.txt
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About This Analysis
This KCW 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 KCW.
Last updated: July 30, 2025