Ransomware Research

Dev Ransomware

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

Quick Facts

Ransomware Family
Dev
First Seen
July 1, 2025

How Dev Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..dev

Ransom Note and Payment Demands

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

file+README-WARNING+.txt

Ransom message:

notes/+README-WARNING+.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/F78.tmp.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Dev ransomware:

  • cc.exe

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About This Analysis

This Dev 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 Dev.

Last updated: September 30, 2025

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