Ransomware Research
Mobef-Yakes Ransomware
Mobef-Yakes is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2016, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Mobef-Yakes, Malasypt.
Quick Facts
- Ransomware Family
- Mobef-Yakes
- First Seen
- April 1, 2016
- Known Aliases
- Mobef-YakesMalasypt
How Mobef-Yakes Ransomware Works
Targeted Files
Some samples don't change extensions
File Encryption Patterns
Mobef-Yakes modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..keyh0les..keyzRansom Note and Payment Demands
After encrypting files, Mobef-Yakes displays ransom notes demanding payment for file recovery:
PLEASEREAD.ME4-15-2016-INFECTION.TXTRansom message:
notes/4-15-2016-INFECTION.TXT
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Mobef-Yakes ransomware:
Cancel Autoplay 2MobefRansom.Mobef.A.exetmp.exeCancel Autoplay 2.exe
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About This Analysis
This Mobef-Yakes 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 Mobef-Yakes.
Last updated: July 30, 2025