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
    18-12-2024 02:30

General

  • Target

    4e217e2407d26687d8d2f12ad07d7013a5c0c236db79ab72b402e7fe18b0e987.exe

  • Size

    3.1MB

  • MD5

    cbad8ccc75f88cd7c6b5ab3ec70f2e2c

  • SHA1

    b38fe0e24043d3867de1beac829297650c8b1fda

  • SHA256

    4e217e2407d26687d8d2f12ad07d7013a5c0c236db79ab72b402e7fe18b0e987

  • SHA512

    0dec15040dc1b60892ac2330a593891bb5d0e4fdf77075fdacaac9034d53cafebaff4a362236f350ae93cd67ed4a45c1dea8d75b126fc205037780b23322224c

  • SSDEEP

    49152:KvQt62XlaSFNWPjljiFa2RoUYI1HRJ6bbR3LoGdt5ZTHHB72eh2NT:Kvc62XlaSFNWPjljiFXRoUYI1HRJ6tr

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

104.251.123.245:23600

Mutex

4119a2e0-4ae4-4843-8534-99af91a2475d

Attributes
  • encryption_key

    DF6316067206E09C1F85138FCEBD56F5D94BF6AE

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 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\4e217e2407d26687d8d2f12ad07d7013a5c0c236db79ab72b402e7fe18b0e987.exe
    "C:\Users\Admin\AppData\Local\Temp\4e217e2407d26687d8d2f12ad07d7013a5c0c236db79ab72b402e7fe18b0e987.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2228
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2228-0-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

    Filesize

    4KB

  • memory/2228-1-0x00000000000E0000-0x0000000000404000-memory.dmp

    Filesize

    3.1MB

  • memory/2228-2-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

    Filesize

    9.9MB

  • memory/2228-3-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

    Filesize

    4KB

  • memory/2228-4-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

    Filesize

    9.9MB