Ransomware Research

RotorCrypt Ransomware

RotorCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2016, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: RotoCrypt, Tar.

Quick Facts

Ransomware Family
RotorCrypt
First Seen
September 1, 2016
Known Aliases
RotoCryptTar

How RotorCrypt Ransomware Works

Targeted Files

http://www.bleepingcomputer.com/forums/f/239/ransomware-help-tech-support/ Full extension -> !_____ELIZABETH7@PROTONMAIL.COM____.tar https://app.any.run/tasks/ecb424b7-3067-418a-ae97-b624f84297dd/# https://app.any.run/tasks/dd1cba54-c306-444d-a148-d58364dcfc03/# https://app.any.run/tasks/3cd04eb6-4036-43b0-be5e-4e2c16e60d2a/ https://app.any.run/tasks/d8b59eab-2a24-46ca-ba27-31d54f2eb739/# https://app.any.run/tasks/a84e466d-aa99-4338-89e8-2a7ebfe49bb0/# https://app.any.run/tasks/05ecde5f-4758-4ab3-9b94-be221f10a248/

File Encryption Patterns

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

File extensions added after encryption:

..tar.___tar..v8..adamant..pgp..rar..Black_OFFserve!..crypo..SPG..mail..psd..ES_HELPs..1C..1-C..cryptotes..PAYMAN..a800..prus..bak..RT4BLOCK..ANTIDOT..PRIVAT66..SENRUS17..BlockBax_v3.2..biz..c400..c300

Ransom Note and Payment Demands

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

fileINFO.txt

Ransom message:

notes/INFO.txt

Note locations:

EveryFolder
fileprontos_chek_base.txt

Ransom message:

notes/prontos_chek_base.txt

Note locations:

EveryFolder
fileHelp.txt

Ransom message:

notes/Help.txt

Note locations:

EveryFolder
filereadme.txt

Ransom message:

notes/readme.txt

Note locations:

EveryFolder
fileopen_payman.txt
filerecovery.instruction.txt

Ransom message:

notes/recovery.instruction.txt

Note locations:

EveryFolder
fileDOCTOR

Ransom message:

notes/DOCTOR

Note locations:

EveryFolder
fileinformprus.txt

Ransom message:

notes/informprus.txt

Note locations:

EveryFolder
fileNEWS_INGiBiToR.txt

Ransom message:

notes/NEWS_INGiBiToR.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with RotorCrypt ransomware:

  • jMdmXUlS.exe
  • GbMxybQN.exe
  • sys.exe
  • GWWABPFL_Unpack.EXE
  • UQjiGhLH.exe
  • Ransom.RotoCrypt.exe
  • iuy.exe
  • 87675384___.exe
  • RSzENyXs.exe
  • ZGXAJWHs.exe
  • eDIRirAR.exe
  • RotoCrypt
  • OvotKbIF.exe
  • 68433461.exe
  • SvYZSTMJ.exe
  • UhevENmH.exe
  • 3.ex
  • ins.exe
  • dead rdp.exe
  • RarYBiHI.exe
  • RotorCrypt.exe
  • fcBCjQRq.exe
  • INazYNWb.exe
  • SJGZYXKH.EXE
  • ItSTMxWX.exe
  • qLsZCjAl.exe
  • WbshKnkR.exe
  • SYSTEM22.exe
  • f0106768.exe
  • rotor2.exe
  • $RSXX5QC.exe
  • winlogox.exe111
  • svalwzmz.exe
  • win_pro.exe
  • myfile.exe
  • hixonwzo.exe
  • wdedwzwl.exe
  • rgbcnczg.exe
  • winIogon.exe
  • kvqvadmz.exe
  • lelmfoxy.exe
  • kdehynij.exe
  • config.exe
  • qxslydwx.exe
  • qpqlktqz.exe
  • wlnIogon.exe
  • 232323.t
  • wlnlogon n.exe
  • <random>.exe

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About This Analysis

This RotorCrypt 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 RotorCrypt.

Last updated: July 30, 2025

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