Analysis

  • max time kernel
    72s
  • max time network
    72s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-08-2024 06:22

Errors

Reason
Machine shutdown

General

  • Target

    dwdwdw.exe

  • Size

    3.1MB

  • MD5

    2918c8a614e88697a74fa44db27518f0

  • SHA1

    e7f6f4cf9e8cb900e71633b628b3a3b54e90a179

  • SHA256

    ace4ac0da20b7e8b91205196f973a80e117bc4cede40ea445e851382567456a4

  • SHA512

    f452b243d7ed593e4d22481e02431773687f1c61783ecebf70bb8e80ce17332b9f1c1a4cb21760770dcbb0adef22ab6c4196089b50a2565ba2da4d962b22b8e3

  • SSDEEP

    49152:VHobtR1o2PmNXo7WCr5lkcXcIYXrYdyQTHHB72eh2NT:VHmRvmNXo7WCr5lkcXcI6/

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

147.185.221.18:42996

147.185.221.18:1770

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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies data under HKEY_USERS 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dwdwdw.exe
    "C:\Users\Admin\AppData\Local\Temp\dwdwdw.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Windows\System32\shutdown.exe
      "C:\Windows\System32\shutdown.exe" /r /t 0
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2052
  • C:\Windows\system32\LogonUI.exe
    "LogonUI.exe" /flags:0x4 /state0:0xa3946855 /state1:0x41c64e6d
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:2492

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2268-0-0x00007FFBC4853000-0x00007FFBC4855000-memory.dmp

    Filesize

    8KB

  • memory/2268-1-0x00000000003A0000-0x00000000006C4000-memory.dmp

    Filesize

    3.1MB

  • memory/2268-2-0x00007FFBC4850000-0x00007FFBC5311000-memory.dmp

    Filesize

    10.8MB

  • memory/2268-3-0x000000001BDB0000-0x000000001BE00000-memory.dmp

    Filesize

    320KB

  • memory/2268-4-0x000000001BEC0000-0x000000001BF72000-memory.dmp

    Filesize

    712KB

  • memory/2268-5-0x00007FFBC4853000-0x00007FFBC4855000-memory.dmp

    Filesize

    8KB

  • memory/2268-6-0x00007FFBC4850000-0x00007FFBC5311000-memory.dmp

    Filesize

    10.8MB

  • memory/2268-7-0x000000001BD80000-0x000000001BD92000-memory.dmp

    Filesize

    72KB

  • memory/2268-8-0x000000001BE40000-0x000000001BE7C000-memory.dmp

    Filesize

    240KB

  • memory/2268-9-0x00007FFBC4850000-0x00007FFBC5311000-memory.dmp

    Filesize

    10.8MB