Ransomware Research
ThunderX Ransomware
ThunderX is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Ranzy Locker.
Quick Facts
- Ransomware Family
- ThunderX
- First Seen
- August 1, 2020
- Known Aliases
- Ranzy Locker
How ThunderX Ransomware Works
Targeted Files
Contains antidbg checks
File Encryption Patterns
ThunderX modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..tx_locked..RNZ..ranzy..RANZYLOCKED..lock./\.[a-zA-Z]{5}$/Ransom Note and Payment Demands
After encrypting files, ThunderX displays ransom notes demanding payment for file recovery:
readme.txtRansom message:
notes/readme.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with ThunderX ransomware:
Trojan.Ransom.ThunderX.exe27695.bin12565.exe6000.exe
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About This Analysis
This ThunderX 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 ThunderX.
Last updated: July 30, 2025