Ransomware Research
NK Ransomware
NK is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2024, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- NK
- First Seen
- October 1, 2024
How NK Ransomware Works
File Encryption Patterns
NK modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.[a-z0-9]{4}$/
Ransom Note and Payment Demands
After encrypting files, NK displays ransom notes demanding payment for file recovery:
read_it.txt
Ransom message:
notes/read_it.txt
Note locations:
EveryFolder
Ransom message:
notes/o3x9gy783.jpg
Note locations:
Desktop
Technical Indicators
Associated Executable Files
The following executable files are associated with NK ransomware:
기준.exe
svchost.exe
nkorea_protected.exe
Elastio Can Help You
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About This Analysis
This NK 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 NK.
Last updated: July 30, 2025