Ransomware Research
Wesker Ransomware
Wesker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Wesker
- First Seen
- May 1, 2019
How Wesker Ransomware Works
Targeted Files
https://www.bleepingcomputer.com/forums/t/702698/wesker/ Doesn't change filenames
Ransom Note and Payment Demands
After encrypting files, Wesker displays ransom notes demanding payment for file recovery:
!!!INSTRUCTION_RNSMW!!!.txtRansom message:
notes/!!!INSTRUCTION_RNSMW!!!.txt
Note locations:
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About This Analysis
This Wesker 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 Wesker.
Last updated: July 30, 2025