Ransomware Research
Chekyshka Ransomware
Chekyshka is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Chekyshka
- First Seen
- June 1, 2019
How Chekyshka Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
Chekyshka modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..chekyshkaRansom Note and Payment Demands
After encrypting files, Chekyshka displays ransom notes demanding payment for file recovery:
!!!CHEKYSHKA_DECRYPT_README.TXTRansom message:
notes/!!!CHEKYSHKA_DECRYPT_README.TXT
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About This Analysis
This Chekyshka 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 Chekyshka.
Last updated: July 30, 2025