Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-12-2024 03:31

General

  • Target

    83fa36e3a01bf4ab3fc03e0a08782273e38e6a724cb1152179696494b44ab730.exe

  • Size

    3.1MB

  • MD5

    d228d9c94c9e9b9e94bcaab2f8711fa8

  • SHA1

    6b4800ef23217ff864ad59ee401c63535a35766a

  • SHA256

    83fa36e3a01bf4ab3fc03e0a08782273e38e6a724cb1152179696494b44ab730

  • SHA512

    6c74e6dae4f6bcc7604f13f5a7a694b719481c4e82b42092ccc99747f45975789f0b671a1425fa1156dc3ba14d26d21f0e00d3be939c9601c2a3b1e2d27131a4

  • SSDEEP

    49152:Svkt62XlaSFNWPjljiFa2RoUYI8jY+1J/woGdGAFTHHB72eh2NT:Sv462XlaSFNWPjljiFXRoUYI8jYF

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.43.241:4782

Mutex

0517af80-95f0-4a6d-a904-5b7ee8faa157

Attributes
  • encryption_key

    6095BF6D5D58D02597F98370DFD1CCEB782F1EDD

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svhost

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 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 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\83fa36e3a01bf4ab3fc03e0a08782273e38e6a724cb1152179696494b44ab730.exe
    "C:\Users\Admin\AppData\Local\Temp\83fa36e3a01bf4ab3fc03e0a08782273e38e6a724cb1152179696494b44ab730.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2576
    • 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 SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2264
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2884

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    d228d9c94c9e9b9e94bcaab2f8711fa8

    SHA1

    6b4800ef23217ff864ad59ee401c63535a35766a

    SHA256

    83fa36e3a01bf4ab3fc03e0a08782273e38e6a724cb1152179696494b44ab730

    SHA512

    6c74e6dae4f6bcc7604f13f5a7a694b719481c4e82b42092ccc99747f45975789f0b671a1425fa1156dc3ba14d26d21f0e00d3be939c9601c2a3b1e2d27131a4

  • memory/2264-9-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

    Filesize

    9.9MB

  • memory/2264-8-0x0000000000370000-0x0000000000694000-memory.dmp

    Filesize

    3.1MB

  • memory/2264-11-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

    Filesize

    9.9MB

  • memory/2264-12-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

    Filesize

    9.9MB

  • memory/2536-0-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp

    Filesize

    4KB

  • memory/2536-1-0x0000000000020000-0x0000000000344000-memory.dmp

    Filesize

    3.1MB

  • memory/2536-2-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

    Filesize

    9.9MB

  • memory/2536-10-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

    Filesize

    9.9MB