Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    31-07-2024 17:26

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    8b390eb4d2dc32a82c6b8047504fa532

  • SHA1

    5c6d6b99771b1301002a2a89e8567c8e5d8149d4

  • SHA256

    aeeedbe5a56241a34a9761b5517a8648cadee5d583b2fe77d7beb1f030b0c9c3

  • SHA512

    3586923bedc527240bcb6b23d5a55bd55922dc4a2d3a6f7b68bda00d34abb3d473c34ef161199e2515bb8e82536ffc666b91f35f96101395ab6620b20ab13a27

  • SSDEEP

    49152:pHobtR1o2PmNXo7WCr5sN4Rw8IgXrYdSBewTHHB72eh2NT:pHmRvmNXo7WCr5lw8tVB

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:2440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2440-0-0x000007FEF5E93000-0x000007FEF5E94000-memory.dmp

    Filesize

    4KB

  • memory/2440-1-0x00000000012D0000-0x00000000015F4000-memory.dmp

    Filesize

    3.1MB

  • memory/2440-2-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

    Filesize

    9.9MB

  • memory/2440-3-0x000007FEF5E93000-0x000007FEF5E94000-memory.dmp

    Filesize

    4KB

  • memory/2440-4-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

    Filesize

    9.9MB