Ransomware Research

Locky-Asasin Ransomware

Locky-Asasin is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
Locky-Asasin
First Seen
October 1, 2017

How Locky-Asasin ransomware works

File encryption patterns

Locky-Asasin modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.asasin

Ransom note and payment demands

After encrypting files, Locky-Asasin displays ransom notes demanding payment for file recovery:

fileasasin.htm
notes/asasin.htm
Location: Desktop
file/^asasin-[a-f0-9]{4}\.htm$/
notes/asasin-f942.htm
Location: EveryFolder
screenshot
notes/asasin.bmp
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with Locky-Asasin ransomware:

About this analysis

This Locky-Asasin 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 Locky-Asasin.

Last updated: December 30, 2025

Detection coverage

Elastio detects Locky-Asasin inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Locky-Asasin 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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