Ransomware Research
LockTaiwan Ransomware
LockTaiwan is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: ColdLock, CPC.
Quick Facts
- Ransomware Family
- LockTaiwan
- First Seen
- May 1, 2020
- Known Aliases
- ColdLockCPC
How LockTaiwan Ransomware Works
Targeted Files
PowerShell with C# dll Contains date checks (successfull start on 13feb2022) https://www.trendmicro.com/en_us/research/20/e/targeted-ransomware-attack-hits-taiwanese-organizations.html
File Encryption Patterns
LockTaiwan modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..lockedRansom Note and Payment Demands
After encrypting files, LockTaiwan displays ransom notes demanding payment for file recovery:
How To Unlock Files.txtRansom message:
notes/How To Unlock Files.txt
Note locations:
RootDiscsDesktopStartUpTechnical Indicators
Associated Executable Files
The following executable files are associated with LockTaiwan ransomware:
LE.dllQoCOlAHj.execpc_malware.exe-lc.tmp
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About This Analysis
This LockTaiwan 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 LockTaiwan.
Last updated: July 30, 2025