Ransomware Research

BigBobRoss Ransomware

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

Quick Facts

Ransomware Family
BigBobRoss
First Seen
January 1, 2019
Known Aliases
ObfuscatedCheetah

How BigBobRoss Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..obfuscated..encryptedALL..djvu..cheetah..encrypted

Ransom Note and Payment Demands

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

fileRead Me.txt

Ransom message:

notes/Read Me.txt

Note locations:

EveryFolder
fileHow to recover your files.txt

Ransom message:

notes/How to recover your files.txt

Note locations:

EveryFolder
fileHow to recover your files.url

Ransom message:

notes/How to recover your files.url

Note locations:

EveryFolder
fileEncrypt Message.txt

Ransom message:

notes/Encrypt Message.txt

Technical Indicators

Associated Executable Files

The following executable files are associated with BigBobRoss ransomware:

  • BigBobRoss.exe
  • test.exe
  • bedoneupx.exe
  • Obfuscated.exe
  • encrypterXD.exe
  • System.exe
  • windows64bit.exe

Recovery and Decryption Tools

Good news! Decryption tools are available for BigBobRoss ransomware:

0

1

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About This Analysis

This BigBobRoss 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 BigBobRoss.

Last updated: September 30, 2025

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