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Analysis

  • max time kernel
    144s
  • max time network
    148s
  • platform
    windows10-1703_x64
  • resource
    win10-20230703-en
  • resource tags

    arch:x64arch:x86image:win10-20230703-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/07/2023, 19:47

General

  • Target

    bootdecoder.zip

  • Size

    341KB

  • MD5

    276944486fe92de4379efd9dcf667fa8

  • SHA1

    6df2b78653774f263d149d7d1f8803b7f95e2a4c

  • SHA256

    4092271557d4677645efabdac5c87df345de795f01e0e68a1da3c0a5d7fa11e5

  • SHA512

    037363567bca262240a3febe1015f70d6d288ca549ac55f79f183efda47da8a44e2ce2fc5e6dd0e1e5d4bd5b5fd101a96eca235103dd92bc9f6a00cc355f4b11

  • SSDEEP

    6144:PR9Dm7m3oue9XcS97D2km7aNti8OP0j8jlO:PR9gYtelRKuNtircj85O

Score
1/10

Malware Config

Signatures

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\bootdecoder.zip
    1⤵
      PID:4156
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\CompressResolve.ps1xml
      1⤵
      • Opens file in notepad (likely ransom note)
      PID:4312
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:732
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:492
        • C:\Users\Admin\Desktop\bootdecoder\lua.exe
          lua.exe extract.lua
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4728
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c ndisasm.exe extracted.bin -o extracted_asm.asm
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:3788
            • C:\Users\Admin\Desktop\bootdecoder\ndisasm.exe
              ndisasm.exe extracted.bin -o extracted_asm.asm
              4⤵
                PID:3884
          • C:\Users\Admin\Desktop\bootdecoder\lua.exe
            lua.exe extract.lua
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2100
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ndisasm.exe extracted.bin -o extracted_asm.asm
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:4712
              • C:\Users\Admin\Desktop\bootdecoder\ndisasm.exe
                ndisasm.exe extracted.bin -o extracted_asm.asm
                4⤵
                  PID:3928

          Network

          MITRE ATT&CK Matrix

          Replay Monitor

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          Downloads

          • C:\Users\Admin\Desktop\bootdecoder\extracted.bin

            Filesize

            512B

            MD5

            9c44c975675cf21b84fdfe4a6e1569ef

            SHA1

            665d545bffc0d951663c580d075ba257848a45ed

            SHA256

            8a798cdb3fe69f4563e592db8a6138f9c2bf77d2aabd745ab85fc95e79decbdd

            SHA512

            9d32fdffd2855383aec3da63bf93881b187af428e25a598fa95e096ce0f645346b7ab64bf063245a7f4f71803fe78ffbb8d6f110087391d076be683d7a50a5fe

          • memory/2100-127-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/2100-128-0x0000000065B80000-0x0000000065BCF000-memory.dmp

            Filesize

            316KB

          • memory/3884-121-0x00007FF772B70000-0x00007FF772C89000-memory.dmp

            Filesize

            1.1MB

          • memory/3928-126-0x00007FF772B70000-0x00007FF772C89000-memory.dmp

            Filesize

            1.1MB

          • memory/4728-122-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4728-123-0x0000000065B80000-0x0000000065BCF000-memory.dmp

            Filesize

            316KB