Overview

overview

10

Static

static

3

UIOP.exe

windows10-2004-x64

10

UIOP.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    UIOP.exe
  • Size 3.2MB
  • Sample260512-jhq3fagy6x
  • SHA256 eee6d177a92e0e870f5aa99b4366cb4559b3f0c2c6c78ffd4fc4721dfc3d4c91
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasarxwormclientexecutionpersistenceratspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Client

C2

  • brandy.it.com:4782

  • brandy.it.com:443

  • brandy.it.com:80

  • bildad.us.org:80

  • bildad.us.org:443

  • bildad.us.org:8080

Mutex

  • be45b43b-bd2d-46ea-ae86-634e20c1530d

Attributes
  • encryption_key

    D383E5F8335529BD437BAED92C7C0A18C19F5B84

  • install_name

    system32.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Extracted

Family

  • xworm

Version

  • XWorm V6.5 by c3lestial.fun

C2

  • bildad.us.org:8080

  • brandy.it.com:8080

Mutex

  • VtOFSNrTKezCmmlI

Attributes
  • Install_directory

    %AppData%

  • install_file

    XWormClient.exe

aes.plain

Targets

    • Target
      UIOP.exe
    • Size 3.2MB
    • SHA256 eee6d177a92e0e870f5aa99b4366cb4559b3f0c2c6c78ffd4fc4721dfc3d4c91
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    clientexecutionquasarxwormpersistenceratspywaretrojan

    • Detect Xworm Payload

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks