Ransomware Research

AvosLocker Ransomware

AvosLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2021, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
AvosLocker
First Seen
July 1, 2021

How AvosLocker Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..avos..avos2..avoslinux

Ransom Note and Payment Demands

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

fileGET_YOUR_FILES_BACK.txt

Ransom message:

notes/GET_YOUR_FILES_BACK.txt

Note locations:

EveryFolder
fileREADME_FOR_RESTORE

Ransom message:

notes/README_FOR_RESTORE

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with AvosLocker ransomware:

  • d285f1366d0d4fdae0b558db690497ea.exe.@
  • test campaign jan-linux-amd64.bin
  • potter.exe

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About This Analysis

This AvosLocker 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 AvosLocker.

Last updated: September 30, 2025

What is AvosLocker Ransomware? | Elastio