Analysis

  • max time kernel
    60s
  • max time network
    57s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    08/05/2024, 19:14

General

  • Target
    MEMZ.bat
  • Size 13KB
  • Sample240508-xxrt6sdd32
  • SHA256 dae968f47476ef79b122e771ccd0a2bacde2ac3535f68047239682fefa3dfe50
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Executes dropped EXE 7 IoCs
  • 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.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 26 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 43 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.

  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\MEMZ.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2156
    • C:\Windows\system32\cscript.exe
      cscript x.js
      2⤵
      • Suspicious use of FindShellTrayWindow
      PID:756
    • C:\Users\Admin\AppData\Roaming\MEMZ.exe
      "C:\Users\Admin\AppData\Roaming\MEMZ.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      • Suspicious use of WriteProcessMemory
      PID:2900
      • C:\Users\Admin\AppData\Roaming\MEMZ.exe
        "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:1352
      • C:\Users\Admin\AppData\Roaming\MEMZ.exe
        "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:2188
      • C:\Users\Admin\AppData\Roaming\MEMZ.exe
        "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:2208
      • C:\Users\Admin\AppData\Roaming\MEMZ.exe
        "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:536
      • C:\Users\Admin\AppData\Roaming\MEMZ.exe
        "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:764
      • C:\Users\Admin\AppData\Roaming\MEMZ.exe
        "C:\Users\Admin\AppData\Roaming\MEMZ.exe" /main
        3⤵
        • Executes dropped EXE
        • Writes to the Master Boot Record (MBR)
        • Suspicious use of WriteProcessMemory
        PID:1640
        • C:\Windows\SysWOW64\notepad.exe
          "C:\Windows\System32\notepad.exe" \note.txt
          4⤵
            PID:1836
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe" http://google.co.ck/search?q=dank+memz
            4⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:340
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:340 CREDAT:275457 /prefetch:2
              5⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:3048

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          CabC850.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\CabC850.tmp
          • Size 68KB
          • SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
          • MD5 SHA1 SHA512 SSDEEP

          x

          • Path C:\Users\Admin\AppData\Local\Temp\x
          • Size 3KB
          • SHA256 1e19bc83410e1ab92be87ce0cb1d745af7943376b06236dda755df25887e498f
          • MD5 SHA1 SHA512

          x

          • Path C:\Users\Admin\AppData\Local\Temp\x
          • Size 11KB
          • SHA256 3c8cea1a86f07b018e637a1ea2649d907573f78c7e4025ef7e514362d09ff6c0
          • MD5 SHA1 SHA512 SSDEEP

          x

          • Path C:\Users\Admin\AppData\Local\Temp\x
          • Size 4KB
          • SHA256 cc73e2990e99d47471ec12092ca56183604c3c0d0bf49b1d13260ef22a58dcd7
          • MD5 SHA1 SHA512 SSDEEP

          x.js

          • Path C:\Users\Admin\AppData\Local\Temp\x.js
          • Size 448B
          • SHA256 aa01b8864b43e92077a106ed3d4656a511f3ba1910fba40c78a32ee6a621d596
          • MD5 SHA1 SHA512

          z.zip

          • Path C:\Users\Admin\AppData\Local\Temp\z.zip
          • Size 8KB
          • SHA256 44c1857b1c4894b3dfbaccbe04905652e634283dcf6b06c25a74b17021e2a268
          • MD5 SHA1 SHA512 SSDEEP

          MEMZ.exe

          • Path C:\Users\Admin\AppData\Roaming\MEMZ.exe
          • Size 14KB
          • SHA256 a3d5715a81f2fbeb5f76c88c9c21eeee87142909716472f911ff6950c790c24d
          • MD5 SHA1 SHA512 SSDEEP

          note.txt

          • Path C:\note.txt
          • Size 218B
          • SHA256 8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270
          • MD5 SHA1 SHA512

          memory/756-167-0x0000000002570000-0x0000000002571000-memory.dmp