Ransomware Research
Knot Ransomware
Knot is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Knot
- First Seen
- December 1, 2020
How Knot Ransomware Works
Targeted Files
Receives key for encryption from C&C
File Encryption Patterns
Knot modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..encryptedRansom Note and Payment Demands
After encrypting files, Knot displays ransom notes demanding payment for file recovery:
{origin_filename}-HELP.txtRansom message:
notes/DOC6.docx-HELP.txt
Note locations:
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About This Analysis
This Knot 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 Knot.
Last updated: July 30, 2025