Ransomware Research
Sicck Ransomware
Sicck is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2018, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Sicck
- First Seen
- October 1, 2018
How Sicck Ransomware Works
Targeted Files
Full encrypted filenames -> [sicck@protonmail.com]2CylinderEngine.gltf.7z.sicck Downloader -> https://www.hybrid-analysis.com/sample/66252ff5830d882f94ce979b1b2c9b06d293244466fb580f3163a34d0889e1d1/5bf2617d7ca3e10b9b064098 66252ff5830d882f94ce979b1b2c9b06d293244466fb580f3163a34d0889e1d1 -> Downloader
File Encryption Patterns
Sicck modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..sicckRansom Note and Payment Demands
After encrypting files, Sicck displays ransom notes demanding payment for file recovery:
How__to__decrypt__files.txtRansom message:
notes/How__to__decrypt__files.txt
Note locations:
RootDiscsTechnical Indicators
Associated Executable Files
The following executable files are associated with Sicck ransomware:
Sicck.exe
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About This Analysis
This Sicck 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 Sicck.
Last updated: July 30, 2025