Ransomware Research

FRS Ransomware

FRS is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2018, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
FRS
First Seen
March 1, 2018

How FRS Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..FRS

Ransom Note and Payment Demands

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

fileREAD_ME_HELP_ME.txt

Ransom message:

notes/READ_ME_HELP_ME.txt

Note locations:

Desktop
screenshot

Ransom message:

notes/READ_ME_HELP_ME.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with FRS ransomware:

  • Ransom.Win32.FRSCryptor.exe
  • FRS Ransomware
  • FRS.exe
  • frs.exe
  • 09e290740a9d75174578138b6cf27e72.
  • frsransomware.exe

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About This Analysis

This FRS 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 FRS.

Last updated: October 30, 2025

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