Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250207-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250207-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-02-2025 07:56

General

  • Target

    $PLUGINSDIR/System.dll

  • Size

    11KB

  • MD5

    b8992e497d57001ddf100f9c397fcef5

  • SHA1

    e26ddf101a2ec5027975d2909306457c6f61cfbd

  • SHA256

    98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b

  • SHA512

    8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

  • SSDEEP

    192:PPtkumJX7zB22kGwfy0mtVgkCPOs81un:E702k5qpds8Qn

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 7 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Downloads MZ/PE file 1 IoCs
  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Executes dropped EXE 10 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Installs/modifies Browser Helper Object 2 TTPs 8 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies Internet Explorer settings 1 TTPs 26 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs
  • System policy modification 1 TTPs 4 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4660
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3936
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3936 -s 612
        3⤵
        • Program crash
        PID:3496
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3936 -ip 3936
    1⤵
      PID:3448
    • C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
      "C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI4IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5MjEiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE5ODA3NzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0NzIzODkzNDU2Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
      1⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      PID:2904
    • C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\MicrosoftEdge_X64_133.0.3065.59.exe
      "C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\MicrosoftEdge_X64_133.0.3065.59.exe" --msedge --verbose-logging --do-not-launch-msedge --system-level --channel=stable
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:3048
      • C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe
        "C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe" --install-archive="C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\MicrosoftEdge_X64_133.0.3065.59.exe" --msedge --verbose-logging --do-not-launch-msedge --system-level --channel=stable
        2⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Executes dropped EXE
        • Installs/modifies Browser Helper Object
        • Drops file in Program Files directory
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4516
        • C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe
          "C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Program Files\MsEdgeCrashpad" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=133.0.6943.60 "--annotation=exe=C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe" --annotation=plat=Win64 --annotation=prod=Edge --annotation=ver=133.0.3065.59 --initial-client-data=0x224,0x228,0x22c,0x200,0x230,0x7ff663446a68,0x7ff663446a74,0x7ff663446a80
          3⤵
          • Executes dropped EXE
          PID:436
        • C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe
          "C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe" --msedge --channel=stable --system-level --verbose-logging --create-shortcuts=2 --install-level=1
          3⤵
          • Executes dropped EXE
          • Drops file in System32 directory
          • Drops file in Program Files directory
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:4748
          • C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe
            "C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Program Files\MsEdgeCrashpad" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=133.0.6943.60 "--annotation=exe=C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe" --annotation=plat=Win64 --annotation=prod=Edge --annotation=ver=133.0.3065.59 --initial-client-data=0x224,0x228,0x22c,0x200,0x230,0x7ff663446a68,0x7ff663446a74,0x7ff663446a80
            4⤵
            • Executes dropped EXE
            • Drops file in Program Files directory
            PID:3672
        • C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --msedge --channel=stable --register-package-identity --verbose-logging --system-level
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1856
          • C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Program Files\MsEdgeCrashpad" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=133.0.6943.60 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --annotation=plat=Win64 --annotation=prod=Edge --annotation=ver=133.0.3065.59 --initial-client-data=0x224,0x228,0x22c,0x200,0x230,0x7ff70f2a6a68,0x7ff70f2a6a74,0x7ff70f2a6a80
            4⤵
            • Executes dropped EXE
            PID:3776
        • C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --msedge --channel=stable --remove-deprecated-packages --verbose-logging --system-level
          3⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious use of WriteProcessMemory
          PID:4168
          • C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Program Files\MsEdgeCrashpad" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=133.0.6943.60 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --annotation=plat=Win64 --annotation=prod=Edge --annotation=ver=133.0.3065.59 --initial-client-data=0x224,0x228,0x22c,0x200,0x230,0x7ff70f2a6a68,0x7ff70f2a6a74,0x7ff70f2a6a80
            4⤵
            • Executes dropped EXE
            PID:4524
        • C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --msedge --channel=stable --update-game-assist-package --verbose-logging --system-level
          3⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious use of WriteProcessMemory
          PID:4384
          • C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Program Files\MsEdgeCrashpad" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=133.0.6943.60 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\133.0.3065.59\Installer\setup.exe" --annotation=plat=Win64 --annotation=prod=Edge --annotation=ver=133.0.3065.59 --initial-client-data=0x224,0x228,0x22c,0x200,0x230,0x7ff70f2a6a68,0x7ff70f2a6a74,0x7ff70f2a6a80
            4⤵
            • Executes dropped EXE
            PID:4116
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k AppReadiness -p -s AppReadiness
      1⤵
        PID:3060
      • C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\LocalBridge.exe
        "C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\LocalBridge.exe" /InvokerPRAID: Microsoft.MicrosoftOfficeHub prelaunch
        1⤵
          PID:3820
        • C:\Windows\system32\wwahost.exe
          "C:\Windows\system32\wwahost.exe" -ServerName:Microsoft.MicrosoftOfficeHub.wwa
          1⤵
          • Modifies Internet Explorer settings
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4024

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{19FD6E4B-7D57-4E4D-94F6-EB032C7B5AF1}\EDGEMITMP_812B9.tmp\setup.exe

          Filesize

          6.8MB

          MD5

          1b3e9c59f9c7a134ec630ada1eb76a39

          SHA1

          a7e831d392e99f3d37847dcc561dd2e017065439

          SHA256

          ce78ccfb0c9cdb06ea61116bc57e50690650b6b5cf37c1aebfb30c19458ee4ae

          SHA512

          c0e50410dc92d80ff7bc854907774fc551564e078a8d38ca6421f15cea50282c25efac4f357b52b066c4371f9b8d4900fa8122dd80ab06ecbd851c6e049f7a3e

        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

          Filesize

          3.9MB

          MD5

          ad5f7dc7ca3e67dce70c0a89c04519e0

          SHA1

          a10b03234627ca8f3f8034cd5637cda1b8246d83

          SHA256

          663fe0f4e090583e6aa5204b9a80b7a76f677259066e56a7345aebc6bc3e7d31

          SHA512

          ad5490e9865caa454c47ec2e96364b9c566b553e64801da60c295acd570017747be1aff6f22ca6c20c6eee6f6d05a058af72569fd6e656f66e48010978c7fd51

        • C:\Program Files\msedge_installer.log

          Filesize

          72KB

          MD5

          3aae64a723d44ba0c1c5d3e10e45490e

          SHA1

          91a267b5192e938b2b095b2f9a781b127ca3afb1

          SHA256

          8f3d49b49bbe17118bf0eda1f4dad94542f11c890007dba9aa47337be5af98d0

          SHA512

          0bbbc3ae7188d99084c63322cf58a5e420ff28222490f7de31792a25af7047e04084d3f1a0756ef14062431b74ff49af459cf1b37deeff8ff3442b0afd3f085f

        • C:\Program Files\msedge_installer.log

          Filesize

          101KB

          MD5

          225e08e5b381f370ae457c57592d7d40

          SHA1

          b2d33aa05de448ec1e27f491f54e64581bc8d922

          SHA256

          4c9c8143414698f76382edfe31afcce688a56529e6cfc0e6c1a96812b6de21c9

          SHA512

          73325fd285761910495c0322c3ebb1d4b9bdcf5968f229c9740e4ad20db679d9f131c7b19d02f9851817e3b2bcb978e856c518809b20fbe5d8bcb4e211da8151

        • C:\Program Files\msedge_installer.log

          Filesize

          104KB

          MD5

          e8e332f6fdb0aa41c86e8c1043bbfe83

          SHA1

          e3972a4449764d9561ec91a40b584dead5e49314

          SHA256

          13257241a9a1d65fb04d93fe3f5193d395a9d762693f66cb70b9e512817db026

          SHA512

          33d8380505df0a7b0cdf29161a7254ef77c6a060d56937966490eb66d76964a46460b90b7c38cc0bada9fc519228003844396a9c7df9c36295b4ca1b908bc5fd

        • C:\Program Files\msedge_installer.log

          Filesize

          104KB

          MD5

          2a9d6229329fdad57e03bb9f7e39db61

          SHA1

          4c95cf3e5b2e34315ef34baa925adf7221622a87

          SHA256

          a2c21d47679d637d97346cdc4ef2cb4c0791209c6ab7a2962c054713d6cd503d

          SHA512

          7f6d54c2d70d8cff02d82d87eccbf6f20e00bdf8c6a3d0057bb9311d146351f865ac720e16714041bb267655b22f0ced6c416f4e9b55647129a8c6157f55e146

        • memory/3820-70-0x000001A9E1980000-0x000001A9E198E000-memory.dmp

          Filesize

          56KB

        • memory/3820-71-0x000001A9FBEA0000-0x000001A9FBEAA000-memory.dmp

          Filesize

          40KB

        • memory/3820-72-0x000001A9FBED0000-0x000001A9FBED8000-memory.dmp

          Filesize

          32KB

        • memory/3820-73-0x000001A9FD200000-0x000001A9FD449000-memory.dmp

          Filesize

          2.3MB