General

  • Target

    SeroXenLauncher.bat

  • Size

    409KB

  • Sample

    240702-bbh49atgrp

  • MD5

    54d920888e6066870191f44fe0b27206

  • SHA1

    87feb8a460dd1dc736fc96fbfbe37bf67aed2c3e

  • SHA256

    5416eb9ce7028292f5810ab8acec85ab7cd55503bcdf097f3e2ce2a900577797

  • SHA512

    4b23903103954c5d491eedc1c77fec1fea32552b9b863ada312b75388a9a56d38573851d2f6edaf61444fb0549196b1e9310cb6fa4e1773b9bf65291d5e2f72d

  • SSDEEP

    6144:EM7Cp8XlizQNOa/YzLU+RefWtEOag0vQUvb3pOMZ97iJcfaohEt2+4nQQ:4pQl4QR/2LU+RefW7qg27iC+t0nQQ

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

C2

127.0.0.1:4782

browser-julia.gl.at.ply.gg:54488

Mutex

$Sxr-GV6wZsGZZMeZ3qfenc

Attributes
  • encryption_key

    KH74MFPau2OXY0OqPzU8

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1257452635888423017/-MpHtN8_KQyb61HJqaai1yrkmHQG75b_w1I_FDSgXUCXHSAsskj1fAM-GezxYcBKnRgl

Targets

    • Target

      SeroXenLauncher.bat

    • Size

      409KB

    • MD5

      54d920888e6066870191f44fe0b27206

    • SHA1

      87feb8a460dd1dc736fc96fbfbe37bf67aed2c3e

    • SHA256

      5416eb9ce7028292f5810ab8acec85ab7cd55503bcdf097f3e2ce2a900577797

    • SHA512

      4b23903103954c5d491eedc1c77fec1fea32552b9b863ada312b75388a9a56d38573851d2f6edaf61444fb0549196b1e9310cb6fa4e1773b9bf65291d5e2f72d

    • SSDEEP

      6144:EM7Cp8XlizQNOa/YzLU+RefWtEOag0vQUvb3pOMZ97iJcfaohEt2+4nQQ:4pQl4QR/2LU+RefW7qg27iC+t0nQQ

    • Detect Umbral payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Command and Scripting Interpreter: PowerShell

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

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Legitimate hosting services abused for malware hosting/C2

    • 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

MITRE ATT&CK Enterprise v15

Tasks