Ransomware Research

Eris Ransomware

Eris is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2019, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Eris
First Seen
July 1, 2019

How Eris Ransomware Works

Targeted Files

https://twitter.com/grujars/status/1164782056468963329

File Encryption Patterns

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

File extensions added after encryption:

..ERIS..JUBE2./\.[A-Z0-9]{5}$/

Ransom Note and Payment Demands

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

file@ READ ME TO RECOVER FILES @.txt

Ransom message:

notes/@ READ ME TO RECOVER FILES @.txt

Note locations:

EveryFolder
fileHELP-JUBE2.txt
file/^HELP-[A-Z0-9]{5}\.txt$/

Ransom message:

notes/HELP-OIMVA.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Eris ransomware:

  • radBBAFB.tmp.exe
  • radBBAFB.tmp.bin
  • Server.exe
  • unlockme123[V1.2.3][EMAIL_FIX].exe

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About This Analysis

This Eris 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 Eris.

Last updated: July 30, 2025

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