Analysis

  • max time kernel
    1034s
  • max time network
    1044s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    11-04-2024 22:50

General

  • Target

    RyansProject.exe

  • Size

    3.1MB

  • MD5

    20edba711349a03803c2f96bbbe18b39

  • SHA1

    675607f2c3510c35ea0784c1051e3a96c3b44416

  • SHA256

    8e3077a2601f2727d79389b445d9e90336a0055c0f5a7ce330cbd4006876f1f9

  • SHA512

    85130c87a19dc29bb6b6c26aea68f7173bf0df69c2a4b80e90bc2e14c19acdb1457f680e69d75c916fe7d546c470da5bb38b970843b33feda74847f5a675ee4e

  • SSDEEP

    49152:uvyI22SsaNYfdPBldt698dBcjHnk8wbR4LoGdfTHHB72eh2NT:uvf22SsaNYfdPBldt6+dBcjHnk83

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.226:4782

Mutex

aec627fa-aba4-45fa-a0fc-e456110a730a

Attributes
  • encryption_key

    7D414F9EC5601C94A757DDCDCF7C7A7809D8CFD0

  • 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 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\RyansProject.exe
    "C:\Users\Admin\AppData\Local\Temp\RyansProject.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2204
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:3032
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2948
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2668
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\New Text Document.txt
    1⤵
      PID:2348
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\New Text Document.txt
      1⤵
        PID:1080
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\New Text Document.txt
        1⤵
        • Suspicious use of FindShellTrayWindow
        PID:1532

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

        Filesize

        3.1MB

        MD5

        20edba711349a03803c2f96bbbe18b39

        SHA1

        675607f2c3510c35ea0784c1051e3a96c3b44416

        SHA256

        8e3077a2601f2727d79389b445d9e90336a0055c0f5a7ce330cbd4006876f1f9

        SHA512

        85130c87a19dc29bb6b6c26aea68f7173bf0df69c2a4b80e90bc2e14c19acdb1457f680e69d75c916fe7d546c470da5bb38b970843b33feda74847f5a675ee4e

      • memory/2204-1-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

        Filesize

        9.9MB

      • memory/2204-0-0x00000000000A0000-0x00000000003C4000-memory.dmp

        Filesize

        3.1MB

      • memory/2204-2-0x000000001AF70000-0x000000001AFF0000-memory.dmp

        Filesize

        512KB

      • memory/2204-9-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

        Filesize

        9.9MB

      • memory/2348-16-0x0000000000400000-0x0000000000401000-memory.dmp

        Filesize

        4KB

      • memory/2948-8-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

        Filesize

        9.9MB

      • memory/2948-10-0x0000000001320000-0x0000000001644000-memory.dmp

        Filesize

        3.1MB

      • memory/2948-11-0x0000000000BD0000-0x0000000000C50000-memory.dmp

        Filesize

        512KB

      • memory/2948-12-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

        Filesize

        9.9MB

      • memory/2948-13-0x0000000000BD0000-0x0000000000C50000-memory.dmp

        Filesize

        512KB