Ransomware Research

AnimusLocker Ransomware

AnimusLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Animus Locker.

Quick facts

Ransomware Family
AnimusLocker
First Seen
June 1, 2018
Known Aliases
Animus Locker

How AnimusLocker ransomware works

File encryption patterns

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

Extensions added after encryption
.animus.desu

Ransom note and payment demands

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

file/^@_DECRYPT[2-3]?_@\.txt$/
notes/@_DECRYPT3_@.txt
Location: EveryFolder
file/^ANIMUS_RESTORE[2-3]?\.txt$/
notes/ANIMUS_RESTORE2.txt
Location: EveryFolder

Technical indicators

Associated executable files

The following executable files are associated with AnimusLocker ransomware:

Recovery and decryption tools

Decryption tools may be available for AnimusLocker. Review the resources below:

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About this analysis

This AnimusLocker 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 AnimusLocker.

Last updated: December 30, 2025

Detection coverage

Elastio detects AnimusLocker inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify AnimusLocker 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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What is AnimusLocker Ransomware? | Elastio