Ransomware Research
MegaLocker Ransomware
MegaLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: NamPoHyu.
Quick Facts
- Ransomware Family
- MegaLocker
- First Seen
- April 1, 2020
- Known Aliases
- NamPoHyu
How MegaLocker Ransomware Works
Targeted Files
NOSAMPLE https://www.bleepingcomputer.com/forums/t/694744/megalocker-nampohyu-virus-crypted-nampohyu-decrypt-instructiontxt/
File Encryption Patterns
MegaLocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..crypted..nampohyuRansom Note and Payment Demands
After encrypting files, MegaLocker displays ransom notes demanding payment for file recovery:
!DECRYPT_INSTRUCTION.TXTRansom message:
notes/!DECRYPT_INSTRUCTION.TXT
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with MegaLocker ransomware:
stevenxx134@gmail.com.exe
Recovery and Decryption Tools
Good news! Decryption tools are available for MegaLocker ransomware:
0
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About This Analysis
This MegaLocker 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 MegaLocker.
Last updated: July 30, 2025