Ransomware Research
MARK Ransomware
MARK is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2025, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- MARK
- First Seen
- May 1, 2025
How MARK Ransomware Works
Targeted Files
Full extension -> .[7E40E7FB].[decsupp24@tuta.io].MARK
File Encryption Patterns
MARK modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..MARKRansom Note and Payment Demands
After encrypting files, MARK displays ransom notes demanding payment for file recovery:
+README-WARNING+.txtRansom message:
notes/+README-WARNING+.txt
Ransom message:
notes/8624.tmp.png
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with MARK ransomware:
mark_visual.exe
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About This Analysis
This MARK 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 MARK.
Last updated: July 30, 2025