Analysis

  • max time kernel
    95s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-12-2024 17:49

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    1e95dbf3d51282ba1c6c455072db3853

  • SHA1

    62460f6c11bdf66f5180fd06cf50bb6cc1b342f4

  • SHA256

    ac67ed61a6bb0d7db50756f4dbacdb56ed90755f1d9e693d9e3650445b271474

  • SHA512

    965720b3bfaa906748d9fc75d6688fd438245a404724b07aa69282030167559007e0133bf2e5ede8476e15ea8c3d556ecf10d8658ee7d6ccc8d1d73f128232b1

  • SSDEEP

    49152:DvulL26AaNeWgPhlmVqvMQ7XSKCO/RJ6mbR3LoGdQTHHB72eh2NT:DveL26AaNeWgPhlmVqkQ7XSKCO/RJ6g

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

trey

C2

problems-estimation.gl.at.ply.gg:23158

Mutex

108c9f83-3a30-4ea4-82a6-924c2fb96505

Attributes
  • encryption_key

    3C4A7FEC35CCD9EF97E67742362289CDF4B0B0AE

  • install_name

    trey.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    trey

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • 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\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4648
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\trey\trey.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:3928
    • C:\Users\Admin\AppData\Roaming\trey\trey.exe
      "C:\Users\Admin\AppData\Roaming\trey\trey.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:4636
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\trey\trey.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4564

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\trey\trey.exe

    Filesize

    3.1MB

    MD5

    1e95dbf3d51282ba1c6c455072db3853

    SHA1

    62460f6c11bdf66f5180fd06cf50bb6cc1b342f4

    SHA256

    ac67ed61a6bb0d7db50756f4dbacdb56ed90755f1d9e693d9e3650445b271474

    SHA512

    965720b3bfaa906748d9fc75d6688fd438245a404724b07aa69282030167559007e0133bf2e5ede8476e15ea8c3d556ecf10d8658ee7d6ccc8d1d73f128232b1

  • memory/4636-9-0x00007FFF6B500000-0x00007FFF6BFC1000-memory.dmp

    Filesize

    10.8MB

  • memory/4636-11-0x00007FFF6B500000-0x00007FFF6BFC1000-memory.dmp

    Filesize

    10.8MB

  • memory/4636-12-0x000000001D970000-0x000000001D9C0000-memory.dmp

    Filesize

    320KB

  • memory/4636-13-0x000000001DA80000-0x000000001DB32000-memory.dmp

    Filesize

    712KB

  • memory/4636-14-0x00007FFF6B500000-0x00007FFF6BFC1000-memory.dmp

    Filesize

    10.8MB

  • memory/4648-0-0x00007FFF6B503000-0x00007FFF6B505000-memory.dmp

    Filesize

    8KB

  • memory/4648-1-0x0000000000C50000-0x0000000000F74000-memory.dmp

    Filesize

    3.1MB

  • memory/4648-2-0x00007FFF6B500000-0x00007FFF6BFC1000-memory.dmp

    Filesize

    10.8MB

  • memory/4648-10-0x00007FFF6B500000-0x00007FFF6BFC1000-memory.dmp

    Filesize

    10.8MB