Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/08/2026, 04:22

General

  • Target
    vsbet.reisen.exe
  • Size 3.1MB
  • Sample260804-ezmzwsch32
  • SHA256 b2c989daf3539911dfc536dae6a25c404e0235d8a6896e23dc60c012f48a876b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • vsbet.reisen:4782

Mutex
  • 849be0f8-eec9-4660-8f33-8dd6a03f76cf

Attributes
  • encryption_key

    8E95A44086A2AAEBB99953C0805F8B1BE3318987

  • install_name

    vortex-ar-platform-2026.2.0-universal-installer.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 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\vsbet.reisen.exe
    "C:\Users\Admin\AppData\Local\Temp\vsbet.reisen.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4544
    • C:\Users\Admin\AppData\Roaming\SubDir\vortex-ar-platform-2026.2.0-universal-installer.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\vortex-ar-platform-2026.2.0-universal-installer.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:3008

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        vortex-ar-platform-2026.2.0-universal-installer.exe

        • Path C:\Users\Admin\AppData\Roaming\SubDir\vortex-ar-platform-2026.2.0-universal-installer.exe
        • Size 3.1MB
        • SHA256 b2c989daf3539911dfc536dae6a25c404e0235d8a6896e23dc60c012f48a876b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/3008-21-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-24-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-29-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-28-0x000000001CA40000-0x000000001CAF2000-memory.dmp

        memory/3008-27-0x000000001C930000-0x000000001C980000-memory.dmp

        memory/3008-26-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-25-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-17-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-22-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-16-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-19-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-18-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-13-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-14-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-15-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/3008-20-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-4-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-0-0x00007FFACBD3F000-0x00007FFACBD40000-memory.dmp

        memory/4544-11-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-10-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-1-0x0000000000B80000-0x0000000000EA4000-memory.dmp

        memory/4544-7-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-9-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-2-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-6-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-23-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-5-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-8-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp

        memory/4544-3-0x00007FFACBBB0000-0x00007FFACC554000-memory.dmp