Analysis

  • max time kernel
    149s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    07-05-2021 13:26

General

  • Target

    files.05.21.doc

  • Size

    79KB

  • MD5

    1c61ab6f2bdf43b93bb5233f6ca6c5e4

  • SHA1

    8fc13c1610d5a040682cdd1d22e85f6ce2fda3d4

  • SHA256

    ccc7f7f06d6151aac48f2e5eb6162f58c49084c4d46c28d48222ebadff5b6e2d

  • SHA512

    67ca04cc899d14c9316147c3f4f7eff57f96a0420fca47ad78e233807832f750d3d5462c325f95b63a43ada15b308bc412cb0c0448fb725b7e30e1c8cee19885

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Blocklisted process makes network request 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 10 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 18 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • 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\files.05.21.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Windows\SysWOW64\explorer.exe
      explorer c:\users\public\captionProcedureQuery.hta
      2⤵
      • Process spawned unexpected child process
      PID:1996
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1876
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1492
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Public\captionProcedureQuery.hta"
        2⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1728
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\users\public\captionProcedureQuery.jpg,PluginInit
          3⤵
            PID:956

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Public\captionProcedureQuery.hta
        MD5

        71ed29a70f05e45519b3a2bbf68e3f9d

        SHA1

        3d29872afa6ee8282cf3843b96b1c29b4d7ed8c2

        SHA256

        82527e0e6eee06cd0ed2a34f63cb13ee2a6c3dd294cee2dcffdb527c23fa7164

        SHA512

        7e0e458275401fbb63f9bcbd114941ed191f2887559eedfdc99beb22f4244df9c14221b68d830168af4da20dd54432764dbec1e374cb7392f07712f4d6ed7953

      • \??\c:\users\public\captionProcedureQuery.jpg
        MD5

        7548e9382e6076dfe1dfdfdb5c1b9838

        SHA1

        5f3f4f581a43f251fcd213b69129fcb34f8c9380

        SHA256

        bea6a9854a027cba7464e72333f608eb5cb847539bfee175a0e48dfea9acce2c

        SHA512

        cd8a87c9b6e1c1b0ee29bc49d2ad27eec5d2b251a0e090d99f675495ac1298355d1471c7d916e95185a69cbacddd589e483877bf104baeb1a0b74191c229b8b1

      • memory/956-72-0x0000000000000000-mapping.dmp
      • memory/1492-66-0x000007FEFB7B1000-0x000007FEFB7B3000-memory.dmp
        Filesize

        8KB

      • memory/1728-69-0x0000000000000000-mapping.dmp
      • memory/1876-70-0x0000000000000000-mapping.dmp
      • memory/1948-67-0x0000000005F70000-0x0000000006BBA000-memory.dmp
        Filesize

        12.3MB

      • memory/1948-60-0x00000000722B1000-0x00000000722B4000-memory.dmp
        Filesize

        12KB

      • memory/1948-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1948-61-0x000000006FD31000-0x000000006FD33000-memory.dmp
        Filesize

        8KB

      • memory/1996-65-0x000000006ADC1000-0x000000006ADC3000-memory.dmp
        Filesize

        8KB

      • memory/1996-64-0x0000000075511000-0x0000000075513000-memory.dmp
        Filesize

        8KB

      • memory/1996-63-0x0000000000000000-mapping.dmp