Analysis

  • max time kernel
    1561s
  • max time network
    1566s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2023 09:45

General

  • Target

    3.exe

  • Size

    3.1MB

  • MD5

    fc4aeba6edc65fcf2bd47bf61c66ca4c

  • SHA1

    532f44164ccec22376d6e29f58f44934dfeadb5c

  • SHA256

    0a6e5f7ca85a281115b343cb8be21e969ab42efb02ff8cc138c7800291839c8d

  • SHA512

    3c72078fdacbe38418b4a8ffc34e895a69e8c7df5175f0207b56c5ae4f043b3571e05e6e38e5100b21af52e05e80dfee27ff1a44a687d8ae380efda7b11f43d1

  • SSDEEP

    49152:ev1t62XlaSFNWPjljiFa2RoUYIjjjYmzYaoGd4THHB72eh2NT:evH62XlaSFNWPjljiFXRoUYIjjj3

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

127.0.0.7:5555

Mutex

6f01cc79-8527-4436-a34a-473fcf92b46f

Attributes
  • encryption_key

    D52EA8296126E8DD7D221BC02E2826F1CAA96C78

  • 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
  • Creates scheduled task(s) 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\3.exe
    "C:\Users\Admin\AppData\Local\Temp\3.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2440
    • 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⤵
      • Creates scheduled task(s)
      PID:2204

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2440-0-0x0000000001050000-0x0000000001374000-memory.dmp

    Filesize

    3.1MB

  • memory/2440-1-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

    Filesize

    9.9MB

  • memory/2440-2-0x0000000000FD0000-0x0000000001050000-memory.dmp

    Filesize

    512KB

  • memory/2440-4-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

    Filesize

    9.9MB

  • memory/2440-5-0x0000000000FD0000-0x0000000001050000-memory.dmp

    Filesize

    512KB