Ransomware Research

Jaff Ransomware

Jaff is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Jaff
First Seen
May 1, 2017

How Jaff Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..jaff..wlu..sVn

Ransom Note and Payment Demands

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

fileREADME_TO_DECRYPT.txt
fileREADME_TO_DECRYPT.html

Ransom message:

notes/README_TO_DECRYPT.html

Note locations:

EveryFolder
fileREADME_TO_DECRYPT.bmp
fileREADME_TO_DECRYPTl.bmp

Ransom message:

notes/README_TO_DECRYPTl.bmp

Note locations:

EveryFolder
fileREADME_TO_DECRYPTl.txt

Ransom message:

notes/README_TO_DECRYPTl.txt

Note locations:

EveryFolder
file!!!!README_FOR_SAVE FILES.txt

Ransom message:

notes/!!!!README_FOR_SAVE FILES.txt

Note locations:

EveryFolder
file!!!!!SAVE YOUR FILES!!!!.txt

Ransom message:

notes/!!!!!SAVE YOUR FILES!!!!.txt

Note locations:

EveryFolder
file!!!SAVE YOUR FILES!.bmp

Ransom message:

notes/!!!SAVE YOUR FILES!.bmp

Note locations:

EveryFolder
file!!!SAVE YOUR FILES.bmp

Ransom message:

notes/!!!SAVE YOUR FILES.bmp

Note locations:

EveryFolder
fileReadMe.txt

Ransom message:

notes/ReadMe.txt

Note locations:

EveryFolder
fileReadMe.bmp

Ransom message:

notes/ReadMe.bmp

Note locations:

EveryFolder
fileReadMe.html

Ransom message:

notes/ReadMe.html

Note locations:

EveryFolder
fileREADME TO SAVE YOUR FILES.bmp

Ransom message:

notes/README TO SAVE YOUR FILES.bmp

Note locations:

EveryFolder
fileREADME TO SAVE YOUR FILES.html

Ransom message:

notes/README TO SAVE YOUR FILES.html

Note locations:

EveryFolder
fileREADME TO SAVE YOUR FILES.txt

Ransom message:

notes/README TO SAVE YOUR FILES.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Jaff ransomware:

  • Rcfcngzxx
  • NLI.exe
  • Wanna Crypt 2.exe
  • pitupi20.exe.3204.dr
  • pitupi20.exe
  • 04_pitupi20.exe
  • MM_0.exe
  • f87346b.exe
  • dridex.exe
  • pitupi20.exe.3476.dr
  • 666.exe
  • ÍøÒ×Æƽâ666.exe
  • Rcfcngzxx.exe
  • MM_2.exe
  • pitupi20.exe_
  • 924c84415.exe
  • jaff.exe
  • levinsky8.exe

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About This Analysis

This Jaff 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 Jaff.

Last updated: October 30, 2025

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