Ransomware Research
PayDay Ransomware
PayDay is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- PayDay
- First Seen
- January 1, 2019
How PayDay Ransomware Works
Targeted Files
https://app.any.run/tasks/8096d099-a29b-4663-a899-afc845f12e0a/ https://tria.ge/221214-pfr5lscg51/behavioral1 https://app.any.run/tasks/3eea80a8-a0aa-4ad2-9175-f3df940d6d26/
File Encryption Patterns
PayDay modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.[A-Z]{6}$/Ransom Note and Payment Demands
After encrypting files, PayDay displays ransom notes demanding payment for file recovery:
HOW_TO_DECRYPT_MY_FILES.txtRansom message:
notes/HOW_TO_DECRYPT_MY_FILES.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with PayDay ransomware:
myfile.exensis.exewmphostk.exe
Elastio Can Help You
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About This Analysis
This PayDay 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 PayDay.
Last updated: July 30, 2025