Ransomware Research

TheDMR Ransomware

TheDMR is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: DMR64, Clown, NotFound, Clown+, Valley, ALVIN.

Quick Facts

Ransomware Family
TheDMR
First Seen
December 1, 2019
Known Aliases
DMR64ClownNotFoundClown+ValleyALVIN

How TheDMR Ransomware Works

Targeted Files

Encrypts first 0x16010 bytes {mail}{id=XXXXXXXX}{original filename}{rans extension} Ex -> "[rimon.argan@gmail.com][id=XXXXXXXX]file001.jpg.ALVIN" https://www.bleepingcomputer.com/forums/t/734032/alvin-ransomware/ 98f25a227b111870d3a2469ad88992047c9a4b0ec4205ede7bdbcbe5a5b8236f -> requires C&C

File Encryption Patterns

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

File extensions added after encryption:

..DMR64..notfound..clown+..clown..Valley..ALVIN

Ransom Note and Payment Demands

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

file!!! READ THIS !!!.hta

Ransom message:

notes/!!! READ THIS !!!.hta

Note locations:

EveryFolder
fileHOW TO RECOVER ENCRYPTED FILES.txt

Ransom message:

notes/HOW TO RECOVER ENCRYPTED FILES.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with TheDMR ransomware:

  • TheDMR.bin
  • Windows Explorer.exe
  • NotFound.exe
  • Synaptics.exe
  • Heeeh98.exe
  • Heeeh98.exe (Synaptics.exe)

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About This Analysis

This TheDMR 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 TheDMR.

Last updated: July 30, 2025

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