Ransomware Research

Mr.Dark101 Ransomware

Mr.Dark101 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2024, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
Mr.Dark101
First Seen
October 1, 2024

How Mr.Dark101 ransomware works

File encryption patterns

Mr.Dark101 modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
./\.[0-9a-z]{4}$/

Ransom note and payment demands

After encrypting files, Mr.Dark101 displays ransom notes demanding payment for file recovery:

fileread_it.txt
notes/read_it.txt
Location: EveryFolder
screenshot
notes/og3rxs12m.jpg
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with Mr.Dark101 ransomware:

About this analysis

This Mr.Dark101 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 Mr.Dark101.

Last updated: December 30, 2025

Detection coverage

Elastio detects Mr.Dark101 inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Mr.Dark101 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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