Analysis

  • max time kernel
    444s
  • max time network
    448s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/08/2024, 21:57

General

  • Target

    Client-built.exe

  • Size

    3.3MB

  • MD5

    280cdb0f182b4fca9cd0fd87ab0f9551

  • SHA1

    b7631a3d0bc305c70f1a0711ca0d3b03d82252ec

  • SHA256

    88641b449e8a26c6468058f54acf474225b571dab55a921caed63020390b6896

  • SHA512

    d35ec454f18987a700506e1585cfd313906a3e2ab868040b38bba3682ab61b78dc4eec224c23fb8309a8cbd6ae664299940ec8d00afbc0ffaf1a248230c1c8cd

  • SSDEEP

    49152:56LFXL5Z8hlPKxXavRZbki7yEI2hBqTHHB72eh2NT1:56p5Z8hlPKxXavRZIi7vj

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:6712

Mutex

1051d457-43fe-4be3-87a0-52f2e36a87aa

Attributes
  • encryption_key

    F387A0FF28E4F7F4D7B4E353EB2E71F75D3FB5C0

  • install_name

    Windows Host Process.exe

  • log_directory

    Windows-Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Host Process

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:376
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2956
    • C:\Windows\system32\Windows\Windows Host Process.exe
      "C:\Windows\system32\Windows\Windows Host Process.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2136
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3176

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\System32\Windows\Windows Host Process.exe

    Filesize

    3.3MB

    MD5

    280cdb0f182b4fca9cd0fd87ab0f9551

    SHA1

    b7631a3d0bc305c70f1a0711ca0d3b03d82252ec

    SHA256

    88641b449e8a26c6468058f54acf474225b571dab55a921caed63020390b6896

    SHA512

    d35ec454f18987a700506e1585cfd313906a3e2ab868040b38bba3682ab61b78dc4eec224c23fb8309a8cbd6ae664299940ec8d00afbc0ffaf1a248230c1c8cd

  • memory/376-0-0x00007FFA93AE3000-0x00007FFA93AE5000-memory.dmp

    Filesize

    8KB

  • memory/376-1-0x0000000000190000-0x00000000004E6000-memory.dmp

    Filesize

    3.3MB

  • memory/376-2-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

    Filesize

    10.8MB

  • memory/376-9-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

    Filesize

    10.8MB

  • memory/2136-10-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

    Filesize

    10.8MB

  • memory/2136-11-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

    Filesize

    10.8MB

  • memory/2136-12-0x000000001BBD0000-0x000000001BC20000-memory.dmp

    Filesize

    320KB

  • memory/2136-13-0x000000001BCE0000-0x000000001BD92000-memory.dmp

    Filesize

    712KB

  • memory/2136-14-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

    Filesize

    10.8MB