Analysis

  • max time kernel
    883s
  • max time network
    900s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-02-2025 18:12

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    de7909c583d5e0b334e89e95f6384171

  • SHA1

    d483c5298602a9b706d848262929e4ef3ec03720

  • SHA256

    bbdb9c68f5f4dad1f0bc699176d54fca52f89f6a30f4e22b0a7be85b2aade5c1

  • SHA512

    a375179aa3f2b4cbf3543c61ccf6ef422c3664a0797cc6d76d044ecced36f23a1bab7927e24bb54394631c1971d3e745085fdc3152b5d25d8bfe8eaddf7f1ee0

  • SSDEEP

    49152:rvnI22SsaNYfdPBldt698dBcjH+g/MBxvLoGd5THHB72eh2NT:rvI22SsaNYfdPBldt6+dBcjH1/s

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

100.68.87.21:5050

Mutex

7f5242b1-93d2-4a21-9129-5a75556ad700

Attributes
  • encryption_key

    797D0B478D9E5462152708E8188B9B9CACB9144A

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:3324

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • memory/3324-0-0x00007FFF95453000-0x00007FFF95455000-memory.dmp

    Filesize

    8KB

  • memory/3324-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp

    Filesize

    3.1MB

  • memory/3324-2-0x00007FFF95450000-0x00007FFF95F12000-memory.dmp

    Filesize

    10.8MB

  • memory/3324-3-0x000000001BBF0000-0x000000001BC40000-memory.dmp

    Filesize

    320KB

  • memory/3324-4-0x000000001C440000-0x000000001C4F2000-memory.dmp

    Filesize

    712KB

  • memory/3324-5-0x00007FFF95453000-0x00007FFF95455000-memory.dmp

    Filesize

    8KB

  • memory/3324-6-0x00007FFF95450000-0x00007FFF95F12000-memory.dmp

    Filesize

    10.8MB