Analysis

  • max time kernel
    101s
  • max time network
    69s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    05-05-2021 18:03

General

  • Target

    a60f00b0_by_Libranalysis.doc

  • Size

    79KB

  • MD5

    a60f00b085daf1454fc229164be49862

  • SHA1

    71adf78e05ff5af07d9dd6154c1ea0695a013eb6

  • SHA256

    21905e3b19ea3c56637b8c5315cbe422c78d7d8fa48ff6358057b305e748cbfb

  • SHA512

    5194f26b1428ba7de66682bf9907c303024faed51797e8d6f4aefe0daf5b8a78727777930e00c1bed015477a4195f9d12cf84de320c7905596e99c17960394f8

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 16 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\a60f00b0_by_Libranalysis.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:864
    • C:\Windows\SysWOW64\explorer.exe
      explorer c:\users\public\sizeTitleVariable.hta
      2⤵
      • Process spawned unexpected child process
      PID:656
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1356
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1696
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Public\sizeTitleVariable.hta"
        2⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:2044
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\users\public\sizeTitleVariable.jpg,PluginInit
          3⤵
            PID:760

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        89839109321fbc3a3fe65e7ac7a2d04d

        SHA1

        70d35025dc06c3cfaae47b0ce3cd4883531afca2

        SHA256

        854714aa6bb0d8bd26a5c7ffbc3bcb394c828fdaa169711656e8349979e8b404

        SHA512

        2f6a6567b2743575b594f1f06382aed996b7d19aca0946a5828bdf294a6c4ed8e04703eba61344a4a99e0110ba2190d0ae2d1e06cc6eced79cbd565e0f0df740

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

        3efa9dc830295a772471085b19e3bf13

        SHA1

        a063fa883be9a54c2e932b32046ae53d75ad681f

        SHA256

        54b0991e22807185d413b9f2ea5fb67497fbfb204a542ab7c6dd2b3a30ab3425

        SHA512

        fe45f327630613bd4cfbd6a983f6288951e6b9d4315aa289f5c8d8ecf77d984b6c9f910ef6db9a46ac99a33c7628f97354c1d50a2ccc044b622c5b1edb2d0618

      • memory/656-66-0x000000006B4B1000-0x000000006B4B3000-memory.dmp
        Filesize

        8KB

      • memory/656-63-0x0000000000000000-mapping.dmp
      • memory/656-64-0x0000000075891000-0x0000000075893000-memory.dmp
        Filesize

        8KB

      • memory/760-72-0x0000000000000000-mapping.dmp
      • memory/864-65-0x0000000005DA0000-0x00000000069EA000-memory.dmp
        Filesize

        12.3MB

      • memory/864-60-0x00000000729A1000-0x00000000729A4000-memory.dmp
        Filesize

        12KB

      • memory/864-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/864-61-0x0000000070421000-0x0000000070423000-memory.dmp
        Filesize

        8KB

      • memory/864-75-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1356-70-0x0000000000000000-mapping.dmp
      • memory/1696-67-0x000007FEFBEA1000-0x000007FEFBEA3000-memory.dmp
        Filesize

        8KB

      • memory/2044-69-0x0000000000000000-mapping.dmp