Ransomware Research
RedRum Ransomware
RedRum is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: RedRum, Grinch, Thanos, Tycoon.
Quick Facts
- Ransomware Family
- RedRum
- First Seen
- December 1, 2019
- Known Aliases
- RedRumGrinchThanosTycoon
How RedRum Ransomware Works
Targeted Files
https://blogs.blackberry.com/en/2020/06/threat-spotlight-tycoon-ransomware-targets-education-and-software-sectors https://www.bleepingcomputer.com/forums/t/709143/redrum-ransomware-id-redrum;-decryptiontxt-support-topic/ https://www.developer.com/database/what-is-a-custom-runtime-image-in-java-9/ Requires JAVA 11 Full extension -> .id-DDF514A0.[dataissafe@protonmail.com].thanos
File Encryption Patterns
RedRum modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..redrum..grinch..thanos..groove..eruption..magnetoRansom Note and Payment Demands
After encrypting files, RedRum displays ransom notes demanding payment for file recovery:
decryption.txtRansom message:
notes/decryption.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with RedRum ransomware:
program.exeLocal Security Authority Process1.exeLocal Security Authority Process1.zip
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About This Analysis
This RedRum 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 RedRum.
Last updated: July 30, 2025