Ransomware Research
24H Ransomware
24H is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2018, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- 24H
- First Seen
- July 1, 2018
How 24H Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
24H modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..24HRansom Note and Payment Demands
After encrypting files, 24H displays ransom notes demanding payment for file recovery:
ReadME-24H.txtRansom message:
notes/ReadME-24H.txt
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About This Analysis
This 24H 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 24H.
Last updated: July 30, 2025