Ransomware Research

CATAKA Ransomware

CATAKA is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2023, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
CATAKA
First Seen
October 1, 2023

How CATAKA Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

./\.[a-zA-Z0-9]{5}/

Ransom Note and Payment Demands

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

fileReadme.txt

Ransom message:

notes/Readme.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/X7GGoAPFJ.jpg

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with CATAKA ransomware:

  • clip.exe
  • jadwal_payload.exe
  • rundll32.exe

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About This Analysis

This CATAKA 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 CATAKA.

Last updated: October 30, 2025

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