Analysis

  • max time kernel
    129s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-08-2024 14:03

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    f6b32504c6e17ce7b4110d0fabeca301

  • SHA1

    4824b66bb1c6eec5507fb6953a09d43d16c86471

  • SHA256

    f774a57c36378499db334d0b68aa53fc0f79fa10ae651f79a0ef2f73fd6d88d7

  • SHA512

    fbb83968342ae645c5934c494c2c48b8e7bd8f22d923c0344909a26204e6b1f002977dcb84dd91de10da731dad026e009e961a8f144765e34904195ec0817c7e

  • SSDEEP

    49152:KvbI22SsaNYfdPBldt698dBcjHGrRJ6rbR3LoGdRTHHB72eh2NT:Kvk22SsaNYfdPBldt6+dBcjHGrRJ69

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

82.49.9.51:4782

Mutex

49e7b5a4-6fe4-4855-b68c-1fba7121a568

Attributes
  • encryption_key

    BF58CF0517AF2BD741F30FED0728FEC9DA104D6D

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs

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 FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/4016-0-0x00007FF99DE53000-0x00007FF99DE55000-memory.dmp

    Filesize

    8KB

  • memory/4016-1-0x0000000000960000-0x0000000000C84000-memory.dmp

    Filesize

    3.1MB

  • memory/4016-2-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

    Filesize

    10.8MB

  • memory/4016-3-0x000000001C370000-0x000000001C3C0000-memory.dmp

    Filesize

    320KB

  • memory/4016-4-0x000000001C480000-0x000000001C532000-memory.dmp

    Filesize

    712KB

  • memory/4016-5-0x00007FF99DE53000-0x00007FF99DE55000-memory.dmp

    Filesize

    8KB

  • memory/4016-6-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

    Filesize

    10.8MB