Ransomware Research

Rokku Ransomware

Rokku is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Rokku
First Seen
March 1, 2016

How Rokku Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..rokku

Ransom Note and Payment Demands

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

fileREADME_HOW_TO_UNLOCK.TXT

Ransom message:

notes/README_HOW_TO_UNLOCK.TXT

Note locations:

EveryFolder
fileREADME_HOW_TO_UNLOCK.HTML

Ransom message:

notes/README_HOW_TO_UNLOCK.HTML

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Rokku ransomware:

  • Rokku
  • Rokku.exe
  • rokku1.exe.dontrun
  • ruko1
  • rokku.exe
  • phpZiiD6l
  • rokku_unpacked.exe
  • bg.jpg_unpacked.bin

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About This Analysis

This Rokku 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 Rokku.

Last updated: July 30, 2025

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