Ransomware Research

VXUG Ransomware

VXUG is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2023, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Vx-underground.

Quick facts

Ransomware Family
VXUG
First Seen
November 1, 2023
Known Aliases
  • Vx-underground

How VXUG ransomware works

File modification behavior

VXUG updates file modification timestamps after encryption.

File encryption patterns

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

Extensions added after encryption
  • .VXUG

Ransom note and payment demands

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

fileBuy Black Mass Volume II.hta
notes/Buy Black Mass Volume II.hta

Location: RootDiscs, Desktop

fileBuy Black Mass Volume I.txt
notes/Buy Black Mass Volume I.txt

Location: RootDiscs, Desktop

filehow_to_decrypt.hta
notes/how_to_decrypt.hta

Location: EveryFolder

Technical indicators

Associated executable files

The following executable files are associated with VXUG ransomware:

  • AntiRecuvaAndDB.exe

About this analysis

This VXUG 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 VXUG.

Last updated: October 1, 2025

Detection coverage

Elastio detects VXUG inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify VXUG 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.