Analysis

  • max time kernel
    115s
  • max time network
    84s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08/03/2023, 07:26

General

  • Target

    K-1 03.07.2023.doc

  • Size

    527.2MB

  • MD5

    fd37aece5d1c1538fdaab4b4fa1fa16a

  • SHA1

    101fbc6beec580efc3582c7f619c711e9fb6d385

  • SHA256

    d9988c6dcd1c169af8db5bc3c363f18f66501a63dd9fc1b671ad32f5de359472

  • SHA512

    99cc15b540873054513d9f3fb13b250b253ab77ca83c45b350af17d04572b76db67c5f176627aaa8741113bc26d6890a15bde794557065dc9c341a65a4c13fb0

  • SSDEEP

    3072:eoEW2aOtFjH0lP2IpjctfRcVVwEi/A8NVM1wIOCbX6bYLjWFJuvx7ueK6:ZE1aOtFa2I9c3aVw4zwxCbJ4Jup

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.

  • Loads dropped DLL 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 23 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\K-1 03.07.2023.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:2044
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\082725.tmp"
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:864
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Users\Admin\AppData\Local\Temp\082725.tmp"
        3⤵
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:668
        • C:\Windows\system32\regsvr32.exe
          C:\Windows\system32\regsvr32.exe "C:\Windows\system32\MtLSMBmimnyZ\kBBS.dll"
          4⤵
            PID:616
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        2⤵
          PID:1944

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\082725.tmp

              Filesize

              539.7MB

              MD5

              6b18404814f62ec23ea50e48d2f7bf01

              SHA1

              7456474458fab61c3bc0ee4cdfda64d93b104b23

              SHA256

              531a34e224ba7a7f7bda8f8fc0a2b6f14eafe30a166fa75bd648d34c710ff8b2

              SHA512

              e526620c9c66f59bbe7f2258d15b0a75f93befe29c7b4c2a82d7a112b7d5858f93e553c503efca5a192edb7727c2b726a7dd7c080c8c24dd87a8f7efdf3b6da1

            • C:\Users\Admin\AppData\Local\Temp\082731.zip

              Filesize

              875KB

              MD5

              d5d8525d2f7b2c9892d490cd029b3d01

              SHA1

              55452fe55ea736f0e1ffda3b5d3900183a88b337

              SHA256

              b15c399d192ca526d59bb7d1234f5e706753ae4cd428c3185c598add73117099

              SHA512

              777100c871b9c38ba4a2686af946b03b27f0bc62d834ce61fe2746d473f99844d246db26e76930ad0258942bb5578b14e849732d16d77d4932a3d6d62986e562

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

              Filesize

              20KB

              MD5

              fedb6637834f144c66eb8ae7da145c44

              SHA1

              eef56fb53197f4eb495d132d6f3c38f39107507a

              SHA256

              458a72c510d5f7e1557d23e988025c0d7ceed309758c7437823ad45f6605ca0b

              SHA512

              a8148f21c4fec81a0a89294bcf0994dc7d6305c7d85af8a0b22c4b1ad0be24cf355a91c2c85eff19968840aa9f7a64e41aad3ece4b41515245b5658a4c710fac

            • \Users\Admin\AppData\Local\Temp\082725.tmp

              Filesize

              539.7MB

              MD5

              6b18404814f62ec23ea50e48d2f7bf01

              SHA1

              7456474458fab61c3bc0ee4cdfda64d93b104b23

              SHA256

              531a34e224ba7a7f7bda8f8fc0a2b6f14eafe30a166fa75bd648d34c710ff8b2

              SHA512

              e526620c9c66f59bbe7f2258d15b0a75f93befe29c7b4c2a82d7a112b7d5858f93e553c503efca5a192edb7727c2b726a7dd7c080c8c24dd87a8f7efdf3b6da1

            • \Users\Admin\AppData\Local\Temp\082725.tmp

              Filesize

              539.7MB

              MD5

              6b18404814f62ec23ea50e48d2f7bf01

              SHA1

              7456474458fab61c3bc0ee4cdfda64d93b104b23

              SHA256

              531a34e224ba7a7f7bda8f8fc0a2b6f14eafe30a166fa75bd648d34c710ff8b2

              SHA512

              e526620c9c66f59bbe7f2258d15b0a75f93befe29c7b4c2a82d7a112b7d5858f93e553c503efca5a192edb7727c2b726a7dd7c080c8c24dd87a8f7efdf3b6da1

            • memory/616-849-0x0000000000130000-0x0000000000131000-memory.dmp

              Filesize

              4KB

            • memory/668-843-0x00000000003A0000-0x00000000003A1000-memory.dmp

              Filesize

              4KB

            • memory/2044-268-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-376-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-187-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-214-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-241-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

              Filesize

              64KB

            • memory/2044-295-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-322-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-349-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-160-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-378-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-403-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-133-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-106-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-83-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-82-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-81-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-80-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/2044-79-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB