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