Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    03/05/2024, 10:22

General

  • Target

    b113b57d6e1f23380163d91dcfa68a5a.rtf

  • Size

    76KB

  • MD5

    b113b57d6e1f23380163d91dcfa68a5a

  • SHA1

    9b265402cc74d42462bde2525c4adf19e3f62e05

  • SHA256

    33449ee833613e2c3257b9ff6260e6e9e2fccab33fc36740791eed87f5407ee2

  • SHA512

    f42456045cf68e2c218c05677950fd4d5bfa733d39a782a36b42791e447c83ae41ca981583993d6700d22ae37e4365985306a3ccbef03419a5a74d01d8184257

  • SSDEEP

    1536:73l85ZkdagHBEqrSOV/G+HU7EgnrR2XsabF7GQr3co:7G5ZsagHeqrrRrHQxrRMbbF7GQr3co

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 3 IoCs
  • Enumerates connected drives 3 TTPs 3 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 8 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\b113b57d6e1f23380163d91dcfa68a5a.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:2000
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2128
    • 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
      • Suspicious use of WriteProcessMemory
      PID:2568
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\imagesfishingboat.vbs"
        2⤵
        • Blocklisted process makes network request
        • Enumerates connected drives
        PID:1720

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      20KB

      MD5

      50dad639cd49383e4a193f464eeb8ecd

      SHA1

      c09d12b18ae75a7276ab42ebed9b70a88e05153b

      SHA256

      40aaa9452b4e2e98b42e3f70327720a66ceac64535356622bbc801db7c6a89f1

      SHA512

      3534af03fd5ccd8b28f800d8ffcc3aff248ea9bcc06863af49c92bfa40e9ed8e6eedbae1afcf1a7da25be56046039477190fb630854ef26a9da2c7053aee497e

    • C:\Users\Admin\AppData\Roaming\imagesfishingboat.vbs

      Filesize

      61KB

      MD5

      bf7046a9d40c33822cbf5dea1c9629ec

      SHA1

      926fd090a109ae2f8ecee33efbc11b4479e9b66e

      SHA256

      23e00997dbf16764a148038f7a04a7c4559a320c5707d0cdda68e93af9060f1a

      SHA512

      214bbe452c6722adb2ac28a1f1efa9f3c6e0f0b206f6fec50d0d62cb537cbb2cc551da6243b22a7211bcfdab14ac47526f6da2fe9a2f71226e604f28b10953e8

    • memory/2000-0-0x000000002FC61000-0x000000002FC62000-memory.dmp

      Filesize

      4KB

    • memory/2000-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2000-2-0x0000000071A0D000-0x0000000071A18000-memory.dmp

      Filesize

      44KB

    • memory/2000-33-0x0000000071A0D000-0x0000000071A18000-memory.dmp

      Filesize

      44KB

    • memory/2000-51-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB