Analysis

  • max time kernel
    102s
  • max time network
    105s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    08-02-2023 17:28

General

  • Target

    C34455E406795B670CB0F912C7080806240B3BB30440C266B2F34D5EBCA887A6.docx

  • Size

    10KB

  • MD5

    0930a623ffc51bae160dc8a1fbea9676

  • SHA1

    8281985d1f5ad7755e63b6704880335e48da4630

  • SHA256

    c34455e406795b670cb0f912c7080806240b3bb30440c266b2f34d5ebca887a6

  • SHA512

    4c7833fe285e5962a00d34bf6d10ee4248591127872db48804de88d184d7fc4daf625afea5dd0ef17ff241bcc73473a280c12ab7dd169d315f78b5db616a3510

  • SSDEEP

    192:ScIMmtP5hG/b7XN+eO22O+5+5F7Jar/YEChI3gN:SPXRE7XtO227wtar/YECOQ

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 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\C34455E406795B670CB0F912C7080806240B3BB30440C266B2F34D5EBCA887A6.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:1632
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2004
    • 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:1312

    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/1632-54-0x0000000072CF1000-0x0000000072CF4000-memory.dmp
      Filesize

      12KB

    • memory/1632-55-0x0000000070771000-0x0000000070773000-memory.dmp
      Filesize

      8KB

    • memory/1632-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1632-57-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
      Filesize

      8KB

    • memory/1632-58-0x000000007175D000-0x0000000071768000-memory.dmp
      Filesize

      44KB

    • memory/1632-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1632-63-0x000000007175D000-0x0000000071768000-memory.dmp
      Filesize

      44KB

    • memory/2004-60-0x0000000000000000-mapping.dmp
    • memory/2004-61-0x000007FEFC201000-0x000007FEFC203000-memory.dmp
      Filesize

      8KB