Ransomware Research

Dark 101 Ransomware

Dark 101 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Dark 101
First Seen
January 1, 2025

How Dark 101 Ransomware Works

File Encryption Patterns

Dark 101 modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

./\.[0-9a-z]{4}$/

Ransom Note and Payment Demands

After encrypting files, Dark 101 displays ransom notes demanding payment for file recovery:

fileDark101_read_it.txt

Ransom message:

notes/Dark101_read_it.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/umfji3dl7.jpg

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Dark 101 ransomware:

  • adobe_photoshop2025.exe

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About This Analysis

This Dark 101 ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Dark 101.

Last updated: July 30, 2025

Dark 101 Ransomware - Detectable by Elastio