Ransomware Research

Bert Ransomware

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

Quick Facts

Ransomware Family
Bert
First Seen
May 1, 2025

How Bert Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..encryptedbybert

Ransom Note and Payment Demands

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

file.note.txt

Ransom message:

notes/.note.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Bert ransomware:

  • newcryptor.exe
  • payload.exe
  • payload (1).exe

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About This Analysis

This Bert 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 Bert.

Last updated: October 30, 2025

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