Analysis

  • max time kernel
    122s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:05

General

  • Target

    Documentation-3638860794.doc

  • Size

    1000KB

  • MD5

    603bebc04d98f9a62b4201c6d46f9ba6

  • SHA1

    345fb60733a9cb98d9ec051ec3d33abf721477fc

  • SHA256

    6655026d703e9efb9805807cb20b7d8284ff91979f5b746c32a965ca1a268ca4

  • SHA512

    917699e9f97a13a18c7a531a1b136816ae95f647d7e41fa6b56f81ac8ff63e6de877c5672977fcbd5d2705e4a17f317c105c0d3a3d7d7b5aaff64930e6ef6aa2

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 2 IoCs

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

  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 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\Documentation-3638860794.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:916
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2032
      • C:\Windows\SysWOW64\notepad.exe
        "C:\Windows\System32\notepad.exe" "C:\Users\Admin\AppData\Roaming\to_show_but.txt"
        2⤵
        • Process spawned unexpected child process
        • Opens file in notepad (likely ransom note)
        PID:1920
      • C:\Windows\SysWOW64\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe"
        2⤵
        • Process spawned unexpected child process
        • Suspicious use of AdjustPrivilegeToken
        PID:832

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\to_show_but.txt
      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Roaming\to_show_but.txt
      Filesize

      7KB

      MD5

      20ea1ae158670c229a4de5b14a27b1fe

      SHA1

      b71dded5e1da5ae5fac20caf86058cf50a34d903

      SHA256

      59f9673b4397499e180674a90cc75417ecd83fe2f4b37f4c60c5cf88ea7b6595

      SHA512

      bd233c43541a2c91ee80c30e4edfe5c07e518b2fd4cb751ee172abdc77c045b6c949fd6216f9c7130246857b8f4ed30a0b0aa890fd1b71ef28666ab4650a0b33

    • memory/832-73-0x0000000000000000-mapping.dmp
    • memory/916-61-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-64-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-75-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/916-57-0x000000007159D000-0x00000000715A8000-memory.dmp
      Filesize

      44KB

    • memory/916-62-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/916-63-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-58-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
      Filesize

      8KB

    • memory/916-66-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-65-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-67-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-68-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/916-54-0x0000000072B31000-0x0000000072B34000-memory.dmp
      Filesize

      12KB

    • memory/916-55-0x00000000705B1000-0x00000000705B3000-memory.dmp
      Filesize

      8KB

    • memory/916-72-0x000000000078B000-0x00000000007AC000-memory.dmp
      Filesize

      132KB

    • memory/1920-69-0x0000000000000000-mapping.dmp
    • memory/2032-60-0x000007FEFC041000-0x000007FEFC043000-memory.dmp
      Filesize

      8KB

    • memory/2032-59-0x0000000000000000-mapping.dmp