Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    10-12-2023 18:44

General

  • Target

    factura.rtf

  • Size

    11KB

  • MD5

    05c137d8e79ce59ed6e4b7cd78e5b8a2

  • SHA1

    3a41de3774b6a17a34a8bedf1a0881a3f08d492d

  • SHA256

    5a31c77293af2920d7020d5d0236691adcea2c57c2716658ce118a5cba9d4913

  • SHA512

    46551cb4556183b6d5e4fe20e1d2f916c9e50f109f1bec69cc3abce295d1be138c0dadc69ab7a510d4e29e59656b47b1d36a486c1e68d71c776271ff1ef58aa3

  • SSDEEP

    192:TMv9/nrxOgNIVk04Pre4VqPuc+17rf14g/gjXKSDxX8VxrdPJH:Yv9/rsok+Prz1dZKXDsjtJH

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 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 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\factura.rtf"
    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:2548
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1940
    • 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:1712

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

      Filesize

      20KB

      MD5

      3c6f9afaf57b275f783746e9017ec391

      SHA1

      9679a482733928555b9823d7d0c169145f016761

      SHA256

      fc1f80c15c0335ac59e5dff976f47639a2e22b84a9ccedea2d1afa40e8fb9062

      SHA512

      4fabbea892df3a9da03329e1155f2d76e83bddac57330a086330d1cc5a0ae984e6f0922df379749005dc2efbad27fdea6617b2b1a8fec03cd2ad99c4569a9509

    • memory/2548-0-0x000000002F4F1000-0x000000002F4F2000-memory.dmp

      Filesize

      4KB

    • memory/2548-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2548-2-0x000000007171D000-0x0000000071728000-memory.dmp

      Filesize

      44KB

    • memory/2548-11-0x000000007171D000-0x0000000071728000-memory.dmp

      Filesize

      44KB

    • memory/2548-29-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB