Ransomware Research
Nacugunder Ransomware
Nacugunder is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2024, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Nacugunder
- First Seen
- March 1, 2024
How Nacugunder Ransomware Works
File Encryption Patterns
Nacugunder modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..nacugunderRansom Note and Payment Demands
After encrypting files, Nacugunder displays ransom notes demanding payment for file recovery:
how_to_back_files.htmlRansom message:
notes/how_to_back_files.html
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Nacugunder ransomware:
10b.exe
Elastio Can Help You
Don't let Nacugunder ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Nacugunder 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 Nacugunder.
Last updated: October 30, 2025
Recent Ransomware
Explore other threats in our database