Ransomware Research

Eren Yeager Ransomware

Eren Yeager is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2023, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Eren Yeager
First Seen
May 1, 2023

How Eren Yeager Ransomware Works

File Encryption Patterns

Eren Yeager modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

./\.[a-z0-9]{4}\b/

Ransom Note and Payment Demands

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

fileread_it.txt

Ransom message:

notes/read_it.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/5cg8sbfzl.jpg

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Eren Yeager ransomware:

  • dssf.exe
  • requirements.exe
  • windows_dControl.exe
  • windows dControl.exe

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About This Analysis

This Eren Yeager 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 Eren Yeager.

Last updated: July 30, 2025

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