Ransomware Research
Locky-Ykcol Ransomware
Locky-Ykcol is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Locky-Ykcol
- First Seen
- September 1, 2017
How Locky-Ykcol Ransomware Works
Targeted Files
Renames files -> DF383II7-3P71-D0QK-0119BB06-299D702F8325.ykcol;DF383II7-3P71-D0QK-8ED1D4B5-9CED0D722BA6.ykcol
File Encryption Patterns
Locky-Ykcol modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..ykcolRansom Note and Payment Demands
After encrypting files, Locky-Ykcol displays ransom notes demanding payment for file recovery:
ykcol.htmlRansom message:
notes/ykcol.htm
Note locations:
DesktopRansom message:
notes/ykcol.bmp
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Locky-Ykcol ransomware:
txdOsXP.exeCJgBjTI.exe2_.exercCzyIyrUzw.exe87thiuh3gfDGSLy.exe11326216544.vbs
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About This Analysis
This Locky-Ykcol 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 Locky-Ykcol.
Last updated: July 30, 2025