Analysis

  • max time kernel
    128s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    18/08/2024, 21:22

General

  • Target

    Client-built.exe

  • Size

    3.3MB

  • MD5

    9eb8732b560208f0380c386771aba096

  • SHA1

    d2ae1ff6755e79f97485aea27912ed7710378b08

  • SHA256

    d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0

  • SHA512

    686b1968a19d6f81562df6efd659060ecc7d2eceb7b053d530e8bcba030db6e7b55cb7c6364d6dddc7ea9a46b5004cae3a78db5b432ed279ce2fa854fa400b8a

  • SSDEEP

    49152:B6LFXL5Z8hlPKxXavF01l+5I2jPTHHB72eh2NT1:B6p5Z8hlPKxXavFkl0M

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:6712

Mutex

9dcff5fc-a88b-409b-a00a-590c080de54a

Attributes
  • encryption_key

    5678253D7FFD68D83D55A584486F1015D2B1BC30

  • 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 3 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 9 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:3016
    • 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:2660
    • 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:2800
      • 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:2832

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    3.3MB

    MD5

    9eb8732b560208f0380c386771aba096

    SHA1

    d2ae1ff6755e79f97485aea27912ed7710378b08

    SHA256

    d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0

    SHA512

    686b1968a19d6f81562df6efd659060ecc7d2eceb7b053d530e8bcba030db6e7b55cb7c6364d6dddc7ea9a46b5004cae3a78db5b432ed279ce2fa854fa400b8a

  • memory/2800-10-0x0000000000350000-0x00000000006A8000-memory.dmp

    Filesize

    3.3MB

  • memory/2800-9-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp

    Filesize

    9.9MB

  • memory/2800-11-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp

    Filesize

    9.9MB

  • memory/2800-12-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp

    Filesize

    9.9MB

  • memory/3016-0-0x000007FEF4E23000-0x000007FEF4E24000-memory.dmp

    Filesize

    4KB

  • memory/3016-1-0x00000000013D0000-0x0000000001728000-memory.dmp

    Filesize

    3.3MB

  • memory/3016-2-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp

    Filesize

    9.9MB

  • memory/3016-8-0x000007FEF4E20000-0x000007FEF580C000-memory.dmp

    Filesize

    9.9MB