Ransomware Research

InfinityLock Ransomware

InfinityLock is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: InfinityCrypt.

Quick facts

Ransomware Family
InfinityLock
First Seen
September 1, 2017
Known Aliases
InfinityCrypt

How InfinityLock ransomware works

File encryption patterns

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

Extensions added after encryption
./\.[A-F0-9]{64}$/

Ransom note and payment demands

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

fileInfinityLock_Recover_Instructions.txt
notes/InfinityLock_Recover_Instructions.txt
Location: Desktop
message
notes/note.txt
Location: OnceOnCompletion
screenshot
notes/InfinityLock_Recover_Instructions.png
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with InfinityLock ransomware:

About this analysis

This InfinityLock 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 InfinityLock.

Last updated: December 30, 2025

Detection coverage

Elastio detects InfinityLock inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify InfinityLock 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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