Ransomware Research

Anonymous Ransomware

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

Quick facts

Ransomware Family
Anonymous
First Seen
February 1, 2023

How Anonymous ransomware works

File encryption patterns

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

Extensions added after encryption
./\.[a-z0-9]{4}$/

Ransom note and payment demands

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

filefor dencrypt
notes/for dencrypt
Location: EveryFolder
screenshot
notes/
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with Anonymous ransomware:

About this analysis

This Anonymous ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Anonymous.

Last updated: December 30, 2025

Detection coverage

Elastio detects Anonymous inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Anonymous across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.

See How the Hunt Engine WorksRequest a Demo

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