Ransomware Research

Atomic Ransomware

Atomic 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
Atomic
First Seen
July 1, 2025

How Atomic Ransomware Works

Targeted Files

Full extension -> .[7E40E7FB].[data-leakreport@onionmail.com].atomic

File Encryption Patterns

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

File extensions added after encryption:

..atomic

Ransom Note and Payment Demands

After encrypting files, Atomic 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/9F01.tmp.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Atomic ransomware:

  • t6j0g.exe
  • lsess.exe

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About This Analysis

This Atomic 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 Atomic.

Last updated: September 30, 2025

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