Ransomware Research

RobbinHood Ransomware

RobbinHood is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Enc_RobbinHood.

Quick Facts

Ransomware Family
RobbinHood
First Seen
April 1, 2019
Known Aliases
Enc_RobbinHood

How RobbinHood Ransomware Works

Targeted Files

Written in Go template for encrypted files -> Encrypted_<random{16}>.enc_robbinhood Requires c:\Windows\Temp\key.pub

File Encryption Patterns

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

File extensions added after encryption:

..enc_robbin_hood..rbhd

Prefixes added to encrypted files:

Encrypted_

Ransom Note and Payment Demands

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

file_Decryption_ReadMe.html
file_Readme_Decrypt__Files.html

Technical Indicators

Associated Executable Files

The following executable files are associated with RobbinHood ransomware:

  • RobinHood.exe
  • robinhood.exe
  • 0f9cda14-26cf-45aa-9eef-86a8aedb7cbb winlogon.exe BAD!.exe
  • steel.exe
  • Runtime_Service.exe
  • robnr.sys

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About This Analysis

This RobbinHood 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 RobbinHood.

Last updated: July 30, 2025

RobbinHood Ransomware - Detectable by Elastio