Analysis

  • max time kernel
    129s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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 10 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:2368
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2912
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x4f8
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2720
    • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
      "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:816
    • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
      "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2416
    • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
      "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:480
    • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
      "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2240
    • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
      "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2392

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2368-0-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

      Filesize

      4KB

    • memory/2368-1-0x0000000000800000-0x0000000000B24000-memory.dmp

      Filesize

      3.1MB

    • memory/2368-2-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

      Filesize

      9.9MB

    • memory/2368-3-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

      Filesize

      4KB

    • memory/2368-4-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

      Filesize

      9.9MB