Analysis

  • max time kernel
    150s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20230220-ja
  • resource tags

    arch:x64arch:x86image:win7-20230220-jalocale:ja-jpos:windows7-x64systemwindows
  • submitted
    08/03/2023, 05:35

General

  • Target

    2023-03-08_0921.doc

  • Size

    543.3MB

  • MD5

    b13b243434b3d4b186026fa3d3fdba9a

  • SHA1

    c11e836318755c06db5a18c54892e3cccf279da8

  • SHA256

    3fd0964eb74075e3431e27920ccdb2d6edffa8b8c2dac307a20f183d72e0cbdd

  • SHA512

    12564274a8b44887b8cce27abb8e5778e07514beaf3bd11b70bf8f779f912f8a584c555c90c49727868978a07c97c408a699a1a812558fb109954e660f3129e5

  • SSDEEP

    6144:xPn4VZXbatu7MDogsDkHS50LdfcGcbz1f5M9KTFrMpSlMK3Ru+Q28:xP4PbNMkgg3Ru+x

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 FindShellTrayWindow 3 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\2023-03-08_0921.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\063711.tmp"
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2036
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Users\Admin\AppData\Local\Temp\063711.tmp"
        3⤵
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1256
        • C:\Windows\system32\regsvr32.exe
          C:\Windows\system32\regsvr32.exe "C:\Windows\system32\GAKNnpE\RKscJYcg.dll"
          4⤵
            PID:1640
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        2⤵
          PID:1620

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\063711.tmp

              Filesize

              512.7MB

              MD5

              16340a1a8a8e16942901cb79b5827c6c

              SHA1

              c8d280faf85d982ac20dc30262b5ff815b97f54f

              SHA256

              bfe0dde9bb9e21ee13fed780813883c0a543ec011ee7718793848514bee38a1e

              SHA512

              24df68a6aa4b1df97afd39c9eb247412963eb8294588791ac976e46029fb13f37fd2beded6824ab4d0450c0d94dac4cef59d92ecec41fc61d1399b6db01eefa7

            • C:\Users\Admin\AppData\Local\Temp\063714.zip

              Filesize

              848KB

              MD5

              48d4120b1b05af4a03542c5b281143aa

              SHA1

              131de646e85d0ac903225c2f2f4ee2c18e11ccd5

              SHA256

              091c267d3fc0974acfa3fa3ba04ceedcbef7336e399d22a2a9361cac08ba0b92

              SHA512

              c6ff64f32482c622191bac41c0ea5c429621bc79b39e6cb6de96d56f6d07daa9cf6c25ba4a260051b55e700c23b9e91aae6e3cf63975d122d40e692368bdddd4

            • \Users\Admin\AppData\Local\Temp\063711.tmp

              Filesize

              512.7MB

              MD5

              16340a1a8a8e16942901cb79b5827c6c

              SHA1

              c8d280faf85d982ac20dc30262b5ff815b97f54f

              SHA256

              bfe0dde9bb9e21ee13fed780813883c0a543ec011ee7718793848514bee38a1e

              SHA512

              24df68a6aa4b1df97afd39c9eb247412963eb8294588791ac976e46029fb13f37fd2beded6824ab4d0450c0d94dac4cef59d92ecec41fc61d1399b6db01eefa7

            • \Users\Admin\AppData\Local\Temp\063711.tmp

              Filesize

              512.7MB

              MD5

              16340a1a8a8e16942901cb79b5827c6c

              SHA1

              c8d280faf85d982ac20dc30262b5ff815b97f54f

              SHA256

              bfe0dde9bb9e21ee13fed780813883c0a543ec011ee7718793848514bee38a1e

              SHA512

              24df68a6aa4b1df97afd39c9eb247412963eb8294588791ac976e46029fb13f37fd2beded6824ab4d0450c0d94dac4cef59d92ecec41fc61d1399b6db01eefa7

            • memory/1256-1263-0x00000000002B0000-0x00000000002B1000-memory.dmp

              Filesize

              4KB

            • memory/1544-90-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-96-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-84-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-87-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-88-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-86-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-94-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-95-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-93-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-92-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-91-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

              Filesize

              64KB

            • memory/1544-89-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-85-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-97-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-98-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-121-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-163-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-175-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-205-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-79-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-1077-0x0000000006380000-0x0000000006381000-memory.dmp

              Filesize

              4KB

            • memory/1544-80-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-81-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-83-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-82-0x00000000003D0000-0x00000000004D0000-memory.dmp

              Filesize

              1024KB

            • memory/1544-1271-0x0000000006380000-0x0000000006381000-memory.dmp

              Filesize

              4KB

            • memory/1640-1270-0x0000000000470000-0x0000000000471000-memory.dmp

              Filesize

              4KB