Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-11-2023 02:43

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    60e569fdc26a5ebd61c55b18db940fa9

  • SHA1

    c2ad1128f8c71f9df6fb74866666bb4f8d0ff3ee

  • SHA256

    2021bf97c6d6a200867c82fe27f31a4e01961e7efb8bd0fe4d857467f5ca3542

  • SHA512

    d42d660c76a5e7af6070c7b0953c9a882a05ba56607a07c770427b082c2147a32a23c0125b4857dad7859f04f4aba5c1b8f86c5baf1bfaeafa1dbdd3c757dadc

  • SSDEEP

    49152:mvbI22SsaNYfdPBldt698dBcjHORqwbRNLoGd9PTHHB72eh2NT:mvk22SsaNYfdPBldt6+dBcjHORqUN

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

rattata.ddns.net:4782

Mutex

d6708ec5-ed6f-420d-af48-db9ff459fc59

Attributes
  • encryption_key

    08EF2E54E0B00F8210FCC8BAF01B8C73CA04E630

  • 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:2452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2452-0-0x0000000000300000-0x0000000000624000-memory.dmp

    Filesize

    3.1MB

  • memory/2452-1-0x00007FF9CDAF0000-0x00007FF9CE5B1000-memory.dmp

    Filesize

    10.8MB

  • memory/2452-2-0x00000000026D0000-0x00000000026E0000-memory.dmp

    Filesize

    64KB

  • memory/2452-3-0x000000001BD20000-0x000000001BD70000-memory.dmp

    Filesize

    320KB

  • memory/2452-4-0x000000001BE30000-0x000000001BEE2000-memory.dmp

    Filesize

    712KB

  • memory/2452-5-0x00007FF9CDAF0000-0x00007FF9CE5B1000-memory.dmp

    Filesize

    10.8MB

  • memory/2452-6-0x00000000026D0000-0x00000000026E0000-memory.dmp

    Filesize

    64KB