Analysis

  • max time kernel
    96s
  • max time network
    101s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/07/2024, 09:31

General

  • Target

    $SYSDIR/msvcrt.dll

  • Size

    280KB

  • MD5

    dc8b7481f2239317aac1d1ad5498030d

  • SHA1

    5ae6cd3efb3a4ffdeaec52099a96f1bade107978

  • SHA256

    0a38f3f641dda8f39d5a9e07cc2a09cca3d8e08f7d119d37a88bf1aa9602add3

  • SHA512

    0702402bcb4c23a63bd781c412c11fda7643f23bc3f744eda733fa66af8f82ea57f732bd18b54e3954f5b053a3af8a554d975e818009747441089cd6a3692344

  • SSDEEP

    6144:/zZ1SdxAjXExZf/6qxXkj8eWNB4ctFMgiFwNr7mcl2+LZdV:rZ1k2DExZqis8eg4GUzoL

Score
3/10

Malware Config

Signatures

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$SYSDIR\msvcrt.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4020
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$SYSDIR\msvcrt.dll,#1
      2⤵
        PID:2024
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2024 -s 600
          3⤵
          • Program crash
          PID:4060
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2024 -ip 2024
      1⤵
        PID:4744

      Network

      MITRE ATT&CK Matrix

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      Downloads