Analysis

  • max time kernel
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    20/09/2026, 12:49

General

  • Target
    Client-built.exe
  • Size 3.2MB
  • Sample260920-p2ndjsvs9p
  • SHA256 73bbf2725c71944b029e8ca264769d348d0cdcc75a0f2749cfcc36b427e3fbac
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 127.0.0.1:4782

Mutex
  • bd60b3f9-e86c-4eef-b8fb-f688a608871c

Attributes
  • encryption_key

    C2A2959F6FB18E9E60626AA7D069DCDF54C32464

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 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 FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:6020

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/6020-0-0x00007FFCC146F000-0x00007FFCC1470000-memory.dmp

        memory/6020-1-0x0000000000F30000-0x000000000125C000-memory.dmp

        memory/6020-2-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-3-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-4-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-5-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-6-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-7-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-8-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-9-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-10-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-11-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-12-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-13-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-14-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp

        memory/6020-15-0x000000001D970000-0x000000001D9C0000-memory.dmp

        memory/6020-16-0x000000001DA80000-0x000000001DB32000-memory.dmp

        memory/6020-17-0x00007FFCC12E0000-0x00007FFCC1C84000-memory.dmp