Ransomware Research
KEYHolder Ransomware
KEYHolder is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2014, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- KEYHolder
- First Seen
- December 1, 2014
How KEYHolder Ransomware Works
Ransom Note and Payment Demands
After encrypting files, KEYHolder displays ransom notes demanding payment for file recovery:
HOW_DECRYPT.htmlRansom message:
notes/HOW_DECRYPT.html.txt
Note locations:
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About This Analysis
This KEYHolder 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 KEYHolder.
Last updated: October 30, 2025
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