Ransomware Research

Locky-Osiris Ransomware

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

Quick Facts

Ransomware Family
Locky-Osiris
First Seen
December 1, 2016

How Locky-Osiris Ransomware Works

Targeted Files

Filenames -> DF383II5--4B71--81KI--FB05569B--F88EF362D29D.osiris 53a9fedfab0d20d64916f1a03620e2be255c5d8ec334370999f0dd03ca7a7624 -> vape param for dll

File Encryption Patterns

Locky-Osiris modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..osiris

Ransom Note and Payment Demands

After encrypting files, Locky-Osiris displays ransom notes demanding payment for file recovery:

fileDesktopOSIRIS.htm

Ransom message:

notes/DesktopOSIRIS.htm

Note locations:

UserProfile
file/^OSIRIS-[a-f0-9]{4}\.htm\b/

Ransom message:

notes/OSIRIS-d004.htm

Note locations:

EveryFolder
screenshot

Ransom message:

notes/DesktopOSIRIS.bmp

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Locky-Osiris ransomware:

  • fQuANqFwqs3.dll
  • 0.exe
  • a.exe
  • cSzdajLDLSL1.dll
  • DvNfXSRc3.dll
  • DvNfXSRc4.dll
  • 874ghv3.dll
  • clsooach1.feds.4048.dr
  • sonmoga1.rudf.2952.dr
  • WHByTsevns1.dll
  • AiOzztua1.dll
  • azXaCUy1.dll
  • 1.js
  • Item-Delivery-Details-00659753.doc.wsf
  • Nfr Calculates
  • 8398f3b.png
  • 28dc3b294da79.png
  • 69d420ae5f7b6.png
  • 580382ee.png
  • e878d4b186a6df9c.png
  • f7ad0.png
  • 7d5ed.png
  • f3ba75f8.png
  • 77a5b3139.png
  • 0c776bba7b9.png
  • 47e66ff4ba0308.png
  • 5.png
  • 32.png
  • 047.png
  • 57.png
  • a7874be441e51887.png
  • f28ba1131dd03fa.png
  • 724.png
  • 1bde2880e3f67ee.png
  • 2707.png
  • 5cb6b2f5e2585885.png
  • 96f6bf527.png
  • 1f57706f283d1d3.png
  • c902f7ad93.png
  • c8f18a4ba22232.png
  • f0cbcfc.png
  • 1859cad102310b0.png
  • cc2376fed.png
  • e9b5a1b84eb4d0a.png
  • e5026.png
  • 42c6d1a339.png
  • 9.png
  • 3d0b067bbd.png
  • c5c54b56258.png
  • acab516b.png
  • 91c.png
  • e48f518bd8.png
  • 2a4de7fc6.png
  • f268bb.png
  • 5818.png
  • 104206.png
  • 029f18730.png
  • ff.png
  • a1.exe
  • 25a10c38cfc4.png
  • 70152669.png
  • 718a.png

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About This Analysis

This Locky-Osiris 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 Locky-Osiris.

Last updated: July 30, 2025

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