fileREADME.txtREAD_ME.txt
notes/README.txt
Location: EveryFolder
Ransomware Research
Ryuk.Net Ransomware
Ryuk.Net is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Chaos.
Quick facts
- Ransomware Family
- Ryuk.Net
- First Seen
- June 1, 2021
- Known Aliases
- Chaos
How Ryuk.Net ransomware works
File modification behavior
Ryuk.Net updates file modification timestamps after encryption.
File encryption patterns
Ryuk.Net modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .encrypted
- .encrypt
- .teddy
- .AstraLocker
- .CRYPTEDPAY
- .jamesbond2021@tutanotacom_jamesbond
- .deltapaymentbitcoin@gmailcom
- .8base
- .deoxy
- .fortnitebattlepass
- ./\.[0-9a-z]{4}$/
- ./\.[0-9a-z]{8}$/
- .fuckazov
- .raped by tqq
- .#lockedFileExtension
Ransom note and payment demands
After encrypting files, Ryuk.Net displays ransom notes demanding payment for file recovery:
fileolvass_el.txt
notes/olvass_el.txt
Location: EveryFolder
fileHelloWorld.txt
notes/HelloWorld.txt
Location: EveryFolder
filestop_propaganda.txt
notes/stop_propaganda.txt
Location: EveryFolder
fileread_it.txt
notes/read_it.txt
Location: EveryFolder
fileREADNIGGER.txt
notes/READNIGGER.txt
Location: EveryFolder
fileGOATEDSIGMA
notes/GOATEDSIGMA
Location: EveryFolder
fileпривет.txt
notes/привет.txt
Location: EveryFolder
fileWhatHappened.txt
notes/WhatHappened.txt
Location: EveryFolder
screenshot
notes/pcg9ss7gk.jpg
Location: Desktop
screenshot
notes/y23wqt10g.jpg
Location: Desktop
screenshot
notes/h2ak1f31g.jpg
Location: Desktop
screenshot
notes/hvhgnn11y.jpg
Location: Desktop
screenshot
notes/jzrhuvylv.png
Location: Desktop
screenshot
notes/nwvem7x85.jpg
Location: Desktop
screenshot
notes/k4m3qyt03.png
Location: Desktop
screenshot
notes/3pj3624rh.jpg
Location: Desktop
screenshot
notes/dgeaf2b3c.jpg
Location: Desktop
screenshot
notes/bgt8v3f6s.jpg
Location: Desktop
Technical indicators
Associated executable files
The following executable files are associated with Ryuk.Net ransomware:
- afs.exe
- aver.exe
- chaos ransomware builder v3.exe
- psn gift card generator.exe
- rw.exe
- svchost.exe
- micro.exe
- voucher-maiutazas.hu.pdf.exe
- PSN Gift Card Generator.exe
- user.exe
- svchost.exe
About this analysis
This Ryuk.Net 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.Net.
Detection coverage
Elastio detects Ryuk.Net inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Ryuk.Net 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.