Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    26/05/2024, 07:13

General

  • Target

    4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe

  • Size

    5.9MB

  • MD5

    1c6d1e90ee7c7ce20fd3c8be4dcc24f2

  • SHA1

    2214ea98bb34bbbc5781f2150c36e9aa75534cab

  • SHA256

    4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c

  • SHA512

    e7b9f7559d4f291c16fcc10b2a3c882295324d4f166779db62ad6996885c1636c574ab7eca3a6b2d658f73257f36a6966f2134af1ab466d12732ee958b3075cd

  • SSDEEP

    98304:muBRQ2yBDa74Y15sPc9q/Un5TJ5yNivnAa/6D6J+oTpEBUQGA1Ypvm:j15TJMSBGjtGA18v

Score
7/10

Malware Config

Signatures

  • Loads dropped DLL 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe
    "C:\Users\Admin\AppData\Local\Temp\4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2936
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c taskkill /f /im "4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe" &start "" "4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe" &exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2712
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /f /im "4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe"
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2168
      • C:\Users\Admin\AppData\Local\Temp\4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe
        "4b65976bb96e78fd4f16ba4c1cdddc1f6c5202a53cba52abcd28f5fb4a30ac7c.exe"
        3⤵
        • Loads dropped DLL
        • Writes to the Master Boot Record (MBR)
        • Suspicious use of SetWindowsHookEx
        PID:2572

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\ExuiKrnln_Win32.lib

          Filesize

          1.6MB

          MD5

          031ad1ecd93701d39265771942ec716c

          SHA1

          cb3ef507bf0e848894fbb96a29bfc94a0c302152

          SHA256

          9a7fde2ea7883701bf858e0daef74d787a31c3cbd9f1171cec0a3a382ee9e6ba

          SHA512

          374dab32b6304834c7acd8b5e6701ece016bf57d3abdd416ef2b63f7cbda24c9e59f9dfc27b6823ac6256bbab38aace74334dec7d57f1ef6cb9b80c239003bae

        • memory/2572-15-0x0000000003990000-0x0000000003991000-memory.dmp

          Filesize

          4KB

        • memory/2572-18-0x0000000003990000-0x0000000003991000-memory.dmp

          Filesize

          4KB

        • memory/2572-21-0x0000000003990000-0x0000000003991000-memory.dmp

          Filesize

          4KB

        • memory/2572-20-0x00000000002C0000-0x00000000002C1000-memory.dmp

          Filesize

          4KB

        • memory/2572-16-0x0000000003990000-0x0000000003991000-memory.dmp

          Filesize

          4KB

        • memory/2572-17-0x0000000003990000-0x0000000003991000-memory.dmp

          Filesize

          4KB

        • memory/2572-11-0x00000000002C0000-0x00000000002C1000-memory.dmp

          Filesize

          4KB

        • memory/2572-14-0x00000000002C0000-0x00000000002C1000-memory.dmp

          Filesize

          4KB

        • memory/2572-13-0x00000000002C0000-0x00000000002C1000-memory.dmp

          Filesize

          4KB

        • memory/2572-10-0x00000000002C0000-0x00000000002C1000-memory.dmp

          Filesize

          4KB

        • memory/2572-12-0x00000000002C0000-0x00000000002C1000-memory.dmp

          Filesize

          4KB

        • memory/2572-19-0x0000000003990000-0x0000000003991000-memory.dmp

          Filesize

          4KB

        • memory/2936-3-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB

        • memory/2936-4-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB

        • memory/2936-5-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB

        • memory/2936-0-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB

        • memory/2936-1-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB

        • memory/2936-2-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB