Ransomware Research
KryptoLocker Ransomware
KryptoLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- KryptoLocker
- First Seen
- March 1, 2016
How KryptoLocker Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
KryptoLocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..kryptedRansom Note and Payment Demands
After encrypting files, KryptoLocker displays ransom notes demanding payment for file recovery:
KryptoLocker_README.txtRansom message:
notes/KryptoLocker_README.txt
Note locations:
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About This Analysis
This KryptoLocker 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 KryptoLocker.
Last updated: July 30, 2025