Analysis

  • max time kernel
    114s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08/03/2023, 08:11

General

  • Target

    ARC_KS9201027011CL.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\ARC_KS9201027011CL.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:912
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\092222.tmp"
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1252
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Users\Admin\AppData\Local\Temp\092222.tmp"
        3⤵
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1812
        • C:\Windows\system32\regsvr32.exe
          C:\Windows\system32\regsvr32.exe "C:\Windows\system32\NejuZpg\ZCXyyN.dll"
          4⤵
            PID:1080
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        2⤵
          PID:868

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\092222.tmp

              Filesize

              517.7MB

              MD5

              9b1e551cd585f8166cd937f2a0980f81

              SHA1

              15fd840efab66b5b385992882a57aa06eb84cb1d

              SHA256

              cfad0dcd5988f2f30d91b4c51bf68ff571ec988393934ecd7bcb876163f5ea66

              SHA512

              a1f633a81871cd972cb7f3d90cad12a536798e2239e8c5488409c8c2ab503187563e9a7779f48f665487536ba1cfbf0daa6bd52055ac87d7cb52bfd56588f430

            • C:\Users\Admin\AppData\Local\Temp\092227.zip

              Filesize

              853KB

              MD5

              fb9e96b0881ea74a860c2d22e9f80272

              SHA1

              c807383bc031f7e7ef247c3d6bda284a6163ba8d

              SHA256

              61e4713129e7466ba4986cbbc1cfe05464439f5a6c3a67590d3be59cc46b29cc

              SHA512

              ed7045dcc833f8318f4741061f4a7c2570cfe5ad93645670d508b9c428ffb838cb54de979690e2feb15d06ed3166c06730a52edfdf4831309513b6f8295b34d0

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

              Filesize

              20KB

              MD5

              08ad242c1a0431484fc1c96c341ab59e

              SHA1

              6c197c123cc1ccc752a44a182bb2baa32739790c

              SHA256

              c250435ffeb1b0138330db7aa527db56c6259102180106ae1bc86ab658ce1e90

              SHA512

              b4038c8729174b4688fabf0fa3a67bcf6c01ae6229e52b4b69df3888094885d2b24122b564edd27d18ea1d98f4ddb18f2a3bdaf6176ffa972be6dc4e0c15250d

            • \Users\Admin\AppData\Local\Temp\092222.tmp

              Filesize

              517.7MB

              MD5

              9b1e551cd585f8166cd937f2a0980f81

              SHA1

              15fd840efab66b5b385992882a57aa06eb84cb1d

              SHA256

              cfad0dcd5988f2f30d91b4c51bf68ff571ec988393934ecd7bcb876163f5ea66

              SHA512

              a1f633a81871cd972cb7f3d90cad12a536798e2239e8c5488409c8c2ab503187563e9a7779f48f665487536ba1cfbf0daa6bd52055ac87d7cb52bfd56588f430

            • \Users\Admin\AppData\Local\Temp\092222.tmp

              Filesize

              517.7MB

              MD5

              9b1e551cd585f8166cd937f2a0980f81

              SHA1

              15fd840efab66b5b385992882a57aa06eb84cb1d

              SHA256

              cfad0dcd5988f2f30d91b4c51bf68ff571ec988393934ecd7bcb876163f5ea66

              SHA512

              a1f633a81871cd972cb7f3d90cad12a536798e2239e8c5488409c8c2ab503187563e9a7779f48f665487536ba1cfbf0daa6bd52055ac87d7cb52bfd56588f430

            • memory/912-477-0x0000000000650000-0x0000000000750000-memory.dmp

              Filesize

              1024KB

            • memory/912-1077-0x0000000006240000-0x0000000006241000-memory.dmp

              Filesize

              4KB

            • memory/912-485-0x0000000000650000-0x0000000000750000-memory.dmp

              Filesize

              1024KB

            • memory/912-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

              Filesize

              64KB

            • memory/912-449-0x0000000000650000-0x0000000000750000-memory.dmp

              Filesize

              1024KB

            • memory/912-1265-0x0000000006240000-0x0000000006241000-memory.dmp

              Filesize

              4KB

            • memory/912-435-0x0000000000650000-0x0000000000750000-memory.dmp

              Filesize

              1024KB

            • memory/1080-1271-0x00000000004A0000-0x00000000004A1000-memory.dmp

              Filesize

              4KB

            • memory/1812-1264-0x0000000000330000-0x0000000000331000-memory.dmp

              Filesize

              4KB