Ransomware Research
KCTF Locker Ransomware
KCTF Locker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2018, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- KCTF Locker
- First Seen
- August 1, 2018
How KCTF Locker Ransomware Works
Targeted Files
CTF ransomware XOR encryption
File Encryption Patterns
KCTF Locker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..DWGRansom Note and Payment Demands
After encrypting files, KCTF Locker displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with KCTF Locker ransomware:
Ransomware.exe
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About This Analysis
This KCTF Locker 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 KCTF Locker.
Last updated: July 30, 2025