Analysis

  • max time kernel
    865s
  • max time network
    870s
  • 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, 21:50

General

  • Target

    Client-built.exe

  • Size

    3.3MB

  • MD5

    7021b44ffa619a2a286dd9bd55d1e321

  • SHA1

    de69ec28f445e6c47b1d2f4440465f3ffc2df174

  • SHA256

    fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e

  • SHA512

    546909a07d8e229c0510c249c4b31c78d699a31130e9933ecc03cc2a1b4a7778bbcb872668aab8575050fe4b6c72715164f290a368dd6471e1c492393cf04f13

  • SSDEEP

    49152:G6LFXL5Z8hlPKxXavFTu9sHMI2jixTHHB72eh2NT1:G6p5Z8hlPKxXavFT+ssYc

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:6712

Mutex

d1acafd6-31e9-4a2f-a5a8-7043dfc62d60

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 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 3 IoCs
  • Suspicious use of SendNotifyMessage 3 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:4148
    • 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:4556
    • 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:2172
      • 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:3288

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

    7021b44ffa619a2a286dd9bd55d1e321

    SHA1

    de69ec28f445e6c47b1d2f4440465f3ffc2df174

    SHA256

    fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e

    SHA512

    546909a07d8e229c0510c249c4b31c78d699a31130e9933ecc03cc2a1b4a7778bbcb872668aab8575050fe4b6c72715164f290a368dd6471e1c492393cf04f13

  • memory/2172-10-0x00007FF8871F0000-0x00007FF887CB1000-memory.dmp

    Filesize

    10.8MB

  • memory/2172-11-0x00007FF8871F0000-0x00007FF887CB1000-memory.dmp

    Filesize

    10.8MB

  • memory/2172-12-0x000000001BDB0000-0x000000001BE00000-memory.dmp

    Filesize

    320KB

  • memory/2172-13-0x000000001BEC0000-0x000000001BF72000-memory.dmp

    Filesize

    712KB

  • memory/2172-14-0x00007FF8871F0000-0x00007FF887CB1000-memory.dmp

    Filesize

    10.8MB

  • memory/2172-17-0x000000001BE40000-0x000000001BE52000-memory.dmp

    Filesize

    72KB

  • memory/2172-18-0x000000001C6C0000-0x000000001C6FC000-memory.dmp

    Filesize

    240KB

  • memory/4148-0-0x00007FF8871F3000-0x00007FF8871F5000-memory.dmp

    Filesize

    8KB

  • memory/4148-1-0x0000000000330000-0x0000000000688000-memory.dmp

    Filesize

    3.3MB

  • memory/4148-2-0x00007FF8871F0000-0x00007FF887CB1000-memory.dmp

    Filesize

    10.8MB

  • memory/4148-9-0x00007FF8871F0000-0x00007FF887CB1000-memory.dmp

    Filesize

    10.8MB