Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    01-08-2024 08:51

General

  • Target

    429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe

  • Size

    3.1MB

  • MD5

    2a93b7369d5bff945e137add755297dc

  • SHA1

    a43b23f75685dd1033fcaf8a8611c0aeff7cb9c9

  • SHA256

    429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0

  • SHA512

    a3d0b5ce054f3765f4f074352aea11cad09689201b9759b0ef32f5e3063c3706bb9991ff8de63c172d43db97073f88f9259ef1cb6a1a25c194125c88e0b17a95

  • SSDEEP

    49152:WvXI22SsaNYfdPBldt698dBcjHPFWbCE2CxpmIHLoGOfpTHHB72eh2NT:WvY22SsaNYfdPBldt6+dBcjHtWbCi

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.8.195:4782

Mutex

f569b663-adac-40e8-9ba7-aa60b6838dad

Attributes
  • encryption_key

    EB173B446A47D9C5ABC3CE2B7C417F5FCEC32402

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • 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 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\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe
    "C:\Users\Admin\AppData\Local\Temp\429d98e4f83301b513eab17210d91579428ac61e976e0df744d155f7f27f46b0.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1892
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2736

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1892-0-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

    Filesize

    4KB

  • memory/1892-1-0x0000000000190000-0x00000000004B4000-memory.dmp

    Filesize

    3.1MB

  • memory/1892-2-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

    Filesize

    9.9MB

  • memory/1892-3-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

    Filesize

    4KB

  • memory/1892-4-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

    Filesize

    9.9MB