Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29/03/2024, 21:36

General

  • Target

    4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe

  • Size

    3.1MB

  • MD5

    b05ef4b68b309f9aefa705d3c0ab50e1

  • SHA1

    ffbf50f019be8426868b616960713fa4f596905c

  • SHA256

    4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a

  • SHA512

    e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b

  • SSDEEP

    49152:2vPI22SsaNYfdPBldt698dBcjHKyRJ68bR3LoGdJJTHHB72eh2NT:2vA22SsaNYfdPBldt6+dBcjHKyRJ6GZ

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

1st

C2

94.156.8.44:4787

94.156.8.44:6606

Mutex

8c89b218-c255-48cb-be3d-4ac14fe780fa

Attributes
  • encryption_key

    4785083178D87EB2AD342D8849D0672AE29F1744

  • install_name

    softgui.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    softgui.svc

  • 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).

  • Creates scheduled task(s) 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 2 IoCs
  • Suspicious use of SendNotifyMessage 2 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\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
    "C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3028
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:1608
    • C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\softgui.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:4532
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3660

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    3.1MB

    MD5

    b05ef4b68b309f9aefa705d3c0ab50e1

    SHA1

    ffbf50f019be8426868b616960713fa4f596905c

    SHA256

    4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a

    SHA512

    e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b

  • memory/3028-0-0x0000000000550000-0x0000000000874000-memory.dmp

    Filesize

    3.1MB

  • memory/3028-1-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

    Filesize

    10.8MB

  • memory/3028-2-0x000000001B500000-0x000000001B510000-memory.dmp

    Filesize

    64KB

  • memory/3028-9-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

    Filesize

    10.8MB

  • memory/4532-11-0x0000000001930000-0x0000000001940000-memory.dmp

    Filesize

    64KB

  • memory/4532-10-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

    Filesize

    10.8MB

  • memory/4532-12-0x000000001CC40000-0x000000001CC90000-memory.dmp

    Filesize

    320KB

  • memory/4532-13-0x000000001CD50000-0x000000001CE02000-memory.dmp

    Filesize

    712KB

  • memory/4532-16-0x000000001CCE0000-0x000000001CCF2000-memory.dmp

    Filesize

    72KB

  • memory/4532-17-0x000000001D460000-0x000000001D49C000-memory.dmp

    Filesize

    240KB

  • memory/4532-18-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

    Filesize

    10.8MB

  • memory/4532-19-0x0000000001930000-0x0000000001940000-memory.dmp

    Filesize

    64KB