Analysis

  • max time kernel
    38s
  • max time network
    34s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-12-2024 20:35

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    cdadc74f3cb613d84558ecaf3e28b573

  • SHA1

    d4a77a1ac3987a3f6ee042871ae17c7d9db6cd0b

  • SHA256

    7ceb557b1ecc941f5a2804c0f40899bdc2e7f7c820e05f7c4e0e89303c360037

  • SHA512

    a66e1657407423697fefc477fed384d20762da4b0280e490fb57426483403a30ad1d8feb0c1c760192cda6c889389b701d4ec90fda63dedf176c975918d916d1

  • SSDEEP

    49152:2vIt62XlaSFNWPjljiFa2RoUYIto5baoGdtm8+THHB72eh2NT:2vE62XlaSFNWPjljiFXRoUYIto5eU

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

138.0.54.91:4782

Mutex

63563c99-67f3-4d20-8c7f-230c3d970b36

Attributes
  • encryption_key

    E22572FBAE45F5F894074ED475A27E306499B335

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Microsoft Link

  • 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).

  • 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:4656

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/4656-0-0x00007FFDC4013000-0x00007FFDC4015000-memory.dmp

    Filesize

    8KB

  • memory/4656-1-0x0000000000940000-0x0000000000C64000-memory.dmp

    Filesize

    3.1MB

  • memory/4656-2-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

    Filesize

    10.8MB

  • memory/4656-3-0x000000001C360000-0x000000001C3B0000-memory.dmp

    Filesize

    320KB

  • memory/4656-4-0x000000001C470000-0x000000001C522000-memory.dmp

    Filesize

    712KB

  • memory/4656-5-0x00007FFDC4013000-0x00007FFDC4015000-memory.dmp

    Filesize

    8KB

  • memory/4656-6-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

    Filesize

    10.8MB