Analysis

  • max time kernel
    1794s
  • max time network
    1799s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-08-2024 05:21

General

  • Target

    menu test.exe

  • Size

    3.1MB

  • MD5

    c86abc64d7110ba0022929f533144f6a

  • SHA1

    d0119c0348c382b68a328e16a65466373009bf98

  • SHA256

    2f2ae02f061bc49648fb8d0941b94dc50e22d7701c126eb68c4575e37d5f4f60

  • SHA512

    9c1a94f219d87ad42573eefee151425d41b4ed3f56e18cdeaad0887f6f03c18a121774f987f1dfe11cdcb67e016e91ac4c86d3355d044309bdcbc29c747f107d

  • SSDEEP

    49152:rvnI22SsaNYfdPBldt698dBcjHVwN3iarbLoGd7Sq2THHB72eh2NT:rvI22SsaNYfdPBldt6+dBcjHQ37

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.150:4782

Mutex

68496e1e-8d91-40cc-9959-07b293449482

Attributes
  • encryption_key

    040C5761F98D19CC4976A471E95FC1AA1E6FFC89

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Steam Corperation

  • subdirectory

    SubDir

Signatures

  • 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).

  • 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\menu test.exe
    "C:\Users\Admin\AppData\Local\Temp\menu test.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4652
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Steam Corperation" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:856
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5092
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Steam Corperation" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2412
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:2156

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

      Filesize

      3.1MB

      MD5

      c86abc64d7110ba0022929f533144f6a

      SHA1

      d0119c0348c382b68a328e16a65466373009bf98

      SHA256

      2f2ae02f061bc49648fb8d0941b94dc50e22d7701c126eb68c4575e37d5f4f60

      SHA512

      9c1a94f219d87ad42573eefee151425d41b4ed3f56e18cdeaad0887f6f03c18a121774f987f1dfe11cdcb67e016e91ac4c86d3355d044309bdcbc29c747f107d

    • memory/4652-0-0x00007FF9B7683000-0x00007FF9B7685000-memory.dmp

      Filesize

      8KB

    • memory/4652-1-0x0000000000BA0000-0x0000000000EC4000-memory.dmp

      Filesize

      3.1MB

    • memory/4652-2-0x00007FF9B7680000-0x00007FF9B8141000-memory.dmp

      Filesize

      10.8MB

    • memory/4652-9-0x00007FF9B7680000-0x00007FF9B8141000-memory.dmp

      Filesize

      10.8MB

    • memory/5092-10-0x00007FF9B7680000-0x00007FF9B8141000-memory.dmp

      Filesize

      10.8MB

    • memory/5092-11-0x00007FF9B7680000-0x00007FF9B8141000-memory.dmp

      Filesize

      10.8MB

    • memory/5092-12-0x000000001C530000-0x000000001C580000-memory.dmp

      Filesize

      320KB

    • memory/5092-13-0x000000001C640000-0x000000001C6F2000-memory.dmp

      Filesize

      712KB

    • memory/5092-14-0x00007FF9B7680000-0x00007FF9B8141000-memory.dmp

      Filesize

      10.8MB