fileREADME.PLEASE.txt
notes/README.PLEASE.txt
Ransomware Research
Ryuk Ransomware
Ryuk is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Ryuk 2.0.
Quick facts
- Ransomware Family
- Ryuk
- First Seen
- August 1, 2018
- Known Aliases
- Ryuk 2.0
How Ryuk ransomware works
File modification behavior
Ryuk updates file modification timestamps after encryption.
File encryption patterns
Ryuk modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .rcrypted
- .RYK
Ransom note and payment demands
After encrypting files, Ryuk displays ransom notes demanding payment for file recovery:
fileRyukReadMe.txt
notes/RyukReadMe.txt
Location: EveryFolder
fileReadMe.txt
notes/ReadMe.txt
fileRyukReadMe.html
notes/RyukReadMe.html
Location: EveryFolder
Technical indicators
Associated executable files
The following executable files are associated with Ryuk ransomware:
- eqBNr.exe
- fivjf.exe
- file000_yguts.exe
- hxmzl.exe
- file000_hxmzl.exe
- zzzavxu.exe
- tmp.exe
- forgottenruins
- Forg.EXE
- TlMMhwH.exe
- QVA1.exe
- R1.EXE
- r.exe
- v19V.exe
- LithuanianicMercy.exe
- mal032.exe
- MtXtS.exe
- qKYRXvh.exe
- StyleDlgDemo.exe
- V1.exe
- YwVkXop.exe
- BwNXFKD.exe
- mscgpho.exe
- 15304-SAoAg.exe
- SplashMfcDialog.EXE
- v2.exe
- V2.EXE
- PortletReferencing
- fx2-141_1.exe
- eNkWieXdclan.exe
- he president's Republican Party has tried to resist calls for witnesses to testif
- US media outlets reported on Tuesday
- CreateCheckboxImageListTest.exe
- vV.exe
- System Manager.exe
- xxx.exe
- me.exe
About this analysis
This Ryuk ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Ryuk.
Detection coverage
Elastio detects Ryuk inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Ryuk across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.