Analysis

  • max time kernel
    101s
  • max time network
    104s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    08-02-2023 17:29

General

  • Target

    B9CD7F34E5260B2002C3B3514C8756E4F211FA5A8CDAD2C107B90131996605E7.docx

  • Size

    10KB

  • MD5

    964435a9422be8e9212752151d6e2045

  • SHA1

    7bf1fa0295f31caca8f93b986e1980764695683b

  • SHA256

    b9cd7f34e5260b2002c3b3514c8756e4f211fa5a8cdad2c107b90131996605e7

  • SHA512

    86e8e259e4244210201502a0da6e7bacd730b9e92f21dc2ab07328a4148bcf9af383610aac0089e431558efe5e7dc32d3775aebdb6a9d509a35dab06f930a2ee

  • SSDEEP

    192:ScIMmtP5hG/b7XN+eOUeO+5+5F7Jar/YEChI3uN:SPXRE7XtOUe7wtar/YECO+

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 2 IoCs
  • Abuses OpenXML format to download file from external location 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 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\B9CD7F34E5260B2002C3B3514C8756E4F211FA5A8CDAD2C107B90131996605E7.docx"
    1⤵
    • Abuses OpenXML format to download file from external location
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1328
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:896
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Launches Equation Editor
      PID:1572

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Exploitation for Client Execution

    1
    T1203

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/896-61-0x0000000000000000-mapping.dmp
    • memory/896-62-0x000007FEFBD11000-0x000007FEFBD13000-memory.dmp
      Filesize

      8KB

    • memory/1328-54-0x0000000072801000-0x0000000072804000-memory.dmp
      Filesize

      12KB

    • memory/1328-55-0x0000000070281000-0x0000000070283000-memory.dmp
      Filesize

      8KB

    • memory/1328-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1328-57-0x000000007126D000-0x0000000071278000-memory.dmp
      Filesize

      44KB

    • memory/1328-58-0x0000000075351000-0x0000000075353000-memory.dmp
      Filesize

      8KB

    • memory/1328-59-0x000000007126D000-0x0000000071278000-memory.dmp
      Filesize

      44KB

    • memory/1328-63-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1328-64-0x000000007126D000-0x0000000071278000-memory.dmp
      Filesize

      44KB