Ransomware Research
PhobosImposter Ransomware
PhobosImposter is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- PhobosImposter
- First Seen
- October 1, 2019
How PhobosImposter Ransomware Works
Targeted Files
https://www.bleepingcomputer.com/forums/t/688649/phobos-ransomware-phobos-phoenix-actin-actor-adage-adame-support https://www.coveware.com/phobos-ransomware-payment Encrypts first 0x20000 bytes Resets mod.date of encrypted files to Sat, 01 January 2000 01:01:01 UT+0000
File Encryption Patterns
PhobosImposter modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..phobosRansom Note and Payment Demands
After encrypting files, PhobosImposter displays ransom notes demanding payment for file recovery:
Restore-My-Files.txtRansom message:
notes/Restore-My-Files.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with PhobosImposter ransomware:
PHOB.EXE
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About This Analysis
This PhobosImposter 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 PhobosImposter.
Last updated: July 30, 2025