Analysis

  • max time kernel
    131s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    31-07-2024 16:54

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    33794c237d2b1071e355cee7718a5864

  • SHA1

    39fedb8d39548676a94a63f66df838338f9952d4

  • SHA256

    63a6116026ded4e6c7061bbebb6ca2c1b58fdad9c65925328d4250eb3d061eaf

  • SHA512

    281b834986953e32bc5bcc93c0e9cdd2b9aba31ef1e5ef2c1cd6bdac3fd46bbbc9db2c83dc8471a26a88d77a3abe9b429861be0595a9100f01d0d7cabec70b00

  • SSDEEP

    49152:NHobtR1o2PmNXo7WCr5f/K0mvhhXrYdzkTHHB72eh2NT:NHmRvmNXo7WCr5f/K0mZR8

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

147.185.221.20:18563

147.185.221.20:9835

Mutex

c2e1b18a-ce93-436d-ad8b-21bf89015e19

Attributes
  • encryption_key

    9E968F05BD874BA1BE086FD1774A027473823F49

  • 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:3032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3032-0-0x000007FEF6193000-0x000007FEF6194000-memory.dmp

    Filesize

    4KB

  • memory/3032-1-0x00000000009E0000-0x0000000000D04000-memory.dmp

    Filesize

    3.1MB

  • memory/3032-2-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp

    Filesize

    9.9MB

  • memory/3032-3-0x000007FEF6193000-0x000007FEF6194000-memory.dmp

    Filesize

    4KB

  • memory/3032-4-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp

    Filesize

    9.9MB