Analysis

  • max time kernel
    133s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    05-08-2024 04:23

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    4290449c878559b7cb44282906d40519

  • SHA1

    e5c1fd8659eab79d82ff98d71ec59712f175dbff

  • SHA256

    01b172d69a0ce6bdf3f29f89b58e18474d07d7c57f22ac4633fdb2cfa794cb6c

  • SHA512

    5001ed29fb746c1691bcd784b6ad88ae1a4e26fa614d62225330a1ae4fe5409be4637233ceb3e7615a4aee1977f3e82e94cf659f3f5f9c544db06e5d0c6e6efd

  • SSDEEP

    49152:NHobtR1o2PmNXo7WCr5Kg++OatXrYdLTHHB72eh2NT:NHmRvmNXo7WCr5Kg++OK

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:2468

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2468-0-0x000007FEF4F23000-0x000007FEF4F24000-memory.dmp

    Filesize

    4KB

  • memory/2468-1-0x00000000001F0000-0x0000000000514000-memory.dmp

    Filesize

    3.1MB

  • memory/2468-2-0x000007FEF4F20000-0x000007FEF590C000-memory.dmp

    Filesize

    9.9MB

  • memory/2468-3-0x000007FEF4F23000-0x000007FEF4F24000-memory.dmp

    Filesize

    4KB

  • memory/2468-4-0x000007FEF4F20000-0x000007FEF590C000-memory.dmp

    Filesize

    9.9MB