Ransomware Research

NSMF Ransomware

NSMF is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
NSMF
First Seen
June 1, 2017

How NSMF Ransomware Works

Targeted Files

Requires C&C to send encryption key

File Encryption Patterns

NSMF modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..nsmf

Ransom Note and Payment Demands

After encrypting files, NSMF displays ransom notes demanding payment for file recovery:

filereadme.txt

Ransom message:

notes/readme.txt

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with NSMF ransomware:

  • hidden-tear.exe
  • NSMF.exe

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About This Analysis

This NSMF 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 NSMF.

Last updated: July 30, 2025