Analysis

  • user interaction
    yes
  • max time kernel
    568s
  • max time network
    529s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    24/05/2026, 17:14

General

  • Target
    WeatherZeroService.exe
  • Size 3.2MB
  • Sample260524-vr1tsaft8x
  • SHA256 95f0e021c978ddd88e2218a7467579255a5ae9552af2508c4243a4adec52d2b8
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Drops file in System32 directory 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Checks processor information in registry 2 TTPs 28 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies registry class 1 IoCs
  • Modifies system certificate store 2 TTPs 9 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 18 IoCs
  • Suspicious use of WriteProcessMemory 50 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:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
    "C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:4892
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {c82192ee-6cb5-4bc0-9ef0-fb818773790a} -Embedding
    1⤵
      PID:1620
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:1252
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe"
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:852
        • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
          WeatherZeroService.exe install
          2⤵
          • System Location Discovery: System Language Discovery
          PID:4928
      • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
        "C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe"
        1⤵
        • System Location Discovery: System Language Discovery
        PID:1540
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe"
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:2256
        • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
          WeatherZeroService.exe start
          2⤵
          • System Location Discovery: System Language Discovery
          PID:4548
      • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
        "C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe"
        1⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1472
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe"
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:3220
        • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
          WeatherZeroService.exe
          2⤵
          • System Location Discovery: System Language Discovery
          PID:1976
        • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
          WeatherZeroService.exe s
          2⤵
          • System Location Discovery: System Language Discovery
          PID:4504
        • C:\Users\Admin\AppData\Local\Temp\WeatherZeroService.exe
          WeatherZeroService.exe start silent
          2⤵
          • System Location Discovery: System Language Discovery
          PID:2388
      • C:\Windows\system32\mmc.exe
        "C:\Windows\system32\mmc.exe" "C:\Windows\system32\services.msc"
        1⤵
        • Drops file in System32 directory
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:4384
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe"
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:4332
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe"
          2⤵
          • Checks processor information in registry
          • Modifies registry class
          • NTFS ADS
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4016
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 1972 -prefsLen 27098 -prefMapHandle 1976 -prefMapSize 270279 -ipcHandle 2064 -initialChannelId {6c3e382a-3a73-493b-8c8b-ae68c8b46605} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
            3⤵
              PID:2180
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2432 -prefsLen 27134 -prefMapHandle 2436 -prefMapSize 270279 -ipcHandle 2444 -initialChannelId {4aebb4d6-006b-4ad5-8ecd-0691834256ff} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
              3⤵
              • Checks processor information in registry
              PID:2312
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3744 -prefsLen 27274 -prefMapHandle 3748 -prefMapSize 270279 -jsInitHandle 3752 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3760 -initialChannelId {59f24290-c2cc-4d28-92a8-fe4e490c53bc} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
              3⤵
              • Checks processor information in registry
              PID:1760
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 3916 -prefsLen 27274 -prefMapHandle 3920 -prefMapSize 270279 -ipcHandle 3936 -initialChannelId {305014bc-29af-4b8e-b729-3f2441107944} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
              3⤵
                PID:2892
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 4456 -prefsLen 34773 -prefMapHandle 4460 -prefMapSize 270279 -jsInitHandle 4464 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 2604 -initialChannelId {5a1c754e-85cc-409b-8f2b-075b5386e9a5} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
                3⤵
                • Checks processor information in registry
                PID:732
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 5000 -prefsLen 34822 -prefMapHandle 4720 -prefMapSize 270279 -ipcHandle 2604 -initialChannelId {0e95c849-1eab-4eb4-8def-1af94b20d3e6} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
                3⤵
                • Checks processor information in registry
                PID:5400
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5152 -prefsLen 32952 -prefMapHandle 5156 -prefMapSize 270279 -jsInitHandle 5380 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5476 -initialChannelId {bb99c5e4-b6b0-4052-b926-246786415cfd} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
                3⤵
                • Checks processor information in registry
                PID:6056
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5644 -prefsLen 32952 -prefMapHandle 5648 -prefMapSize 270279 -jsInitHandle 5652 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5660 -initialChannelId {abc83acd-34f1-4578-863b-114038219305} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
                3⤵
                • Checks processor information in registry
                PID:6064
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5832 -prefsLen 32952 -prefMapHandle 5836 -prefMapSize 270279 -jsInitHandle 5840 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5848 -initialChannelId {1621eaaa-96be-450e-89d2-831264037479} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
                3⤵
                • Checks processor information in registry
                PID:6072
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 6444 -prefsLen 33071 -prefMapHandle 6448 -prefMapSize 270279 -jsInitHandle 6452 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 6460 -initialChannelId {93ed0983-10d1-48ec-8ea5-b31ae2a2544b} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 10 tab
                3⤵
                • Checks processor information in registry
                PID:5480
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 6592 -prefsLen 33071 -prefMapHandle 6332 -prefMapSize 270279 -jsInitHandle 6612 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 1668 -initialChannelId {1c9e08d4-d9a4-4ab2-ac97-015d5c00eb20} -parentPid 4016 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4016" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 11 tab
                3⤵
                • Checks processor information in registry
                PID:6008
          • C:\Users\Admin\Downloads\ProcessExplorer\procexp.exe
            "C:\Users\Admin\Downloads\ProcessExplorer\procexp.exe"
            1⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:5436
            • C:\Users\Admin\AppData\Local\Temp\procexp64.exe
              "C:\Users\Admin\Downloads\ProcessExplorer\procexp.exe"
              2⤵
              • Drops file in Drivers directory
              • Sets service image path in registry
              • Enumerates connected drives
              • Drops file in System32 directory
              • Executes dropped EXE
              • Checks processor information in registry
              • Modifies system certificate store
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious behavior: LoadsDriver
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              • Suspicious use of SetWindowsHookEx
              PID:5468

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                procexp64.exe

                • Path C:\Users\Admin\AppData\Local\Temp\procexp64.exe
                • Size 2.3MB
                • SHA256 8404b6cfad9d998b10d2df6073e1275b7744c0416982bdc5cb7ef5b74348333d
                • MD5 SHA1 SHA512 SSDEEP TLSH

                AlternateServices.bin

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\AlternateServices.bin
                • Size 10KB
                • SHA256 9859df0e7e6753522cafef7c729973aa7c2dd231a8a2b6a74b941d0cbcef7970
                • MD5 SHA1 SHA512 SSDEEP TLSH

                AlternateServices.bin

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\AlternateServices.bin
                • Size 12KB
                • SHA256 4c43906d43f9868334f4b3c3aba1da6bc0880d563e2219d5e4019efe06cd7740
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\db\data.safe.tmp
                • Size 7KB
                • SHA256 4e51a38d656c787efcb73ca291c254bfc559e9d9bf60c230e0a370b48c9ff652
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\db\data.safe.tmp
                • Size 6KB
                • SHA256 c83b72738854dae5746b6fc9eeabb77b8a8b586dccf897a516782ffbb7e96f85
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\db\data.safe.tmp
                • Size 7KB
                • SHA256 2b737cd25bd638dba50fdd7dffcd24d8bce78d0dfbe7eb73d911676dfec55ef0
                • MD5 SHA1 SHA512 SSDEEP TLSH

                events

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\events\events
                • Size 1KB
                • SHA256 b4f306235c236e1dce71fc456416f40ff1dde91c61da1bcd3af2424db2c60d84
                • MD5 SHA1 SHA512 TLSH

                2048636b-a288-40b4-82fb-2db7b95e9f72

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\pending_pings\2048636b-a288-40b4-82fb-2db7b95e9f72
                • Size 16KB
                • SHA256 590859f2fc19389f1d88b8a58943028e19f65fe546b903de3c582b974dbd2157
                • MD5 SHA1 SHA512 SSDEEP TLSH

                72d3207f-a761-4ebe-b658-d33f498bcadd

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\pending_pings\72d3207f-a761-4ebe-b658-d33f498bcadd
                • Size 235B
                • SHA256 1a419732aee3101c67f8979d8d139c8b79f52cb704a82c1086100cf643c1a909
                • MD5 SHA1 SHA512 TLSH

                7789c40b-ba65-4d5e-84fe-ee006171943c

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\pending_pings\7789c40b-ba65-4d5e-84fe-ee006171943c
                • Size 2KB
                • SHA256 c66fd3d41a8918e1c3fcef6d789bfd524ab0418de84f4aa660ba86a3b6d9cad5
                • MD5 SHA1 SHA512 TLSH

                882910f4-83ee-44f8-8109-fce85e0cd057

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\pending_pings\882910f4-83ee-44f8-8109-fce85e0cd057
                • Size 883B
                • SHA256 4d2bf06393454e3c16f467fbf0df9aea8883faa3795925c483f6ba5b51e623d8
                • MD5 SHA1 SHA512 TLSH

                8af796ff-d280-4ebd-a497-873c477408eb

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\pending_pings\8af796ff-d280-4ebd-a497-873c477408eb
                • Size 886B
                • SHA256 902cde58b5928959cfe3a8524ac5777d584efc4c721c71abd3d05d039a1fb53a
                • MD5 SHA1 SHA512 TLSH

                fca93ad4-aec1-4113-97fa-1166e1550d0e

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\datareporting\glean\pending_pings\fca93ad4-aec1-4113-97fa-1166e1550d0e
                • Size 235B
                • SHA256 d918ed6f869d5bbc2ece8e1e26318fc8979be5d61822412b521c3ab625b49adc
                • MD5 SHA1 SHA512 TLSH

                prefs-1.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\prefs-1.js
                • Size 6KB
                • SHA256 ed2fb1d1a1e0be2abe16851ba087ff6d7ac306903efa702a4f7e0250ecd04d32
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs-1.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\prefs-1.js
                • Size 7KB
                • SHA256 32e2f9dcdba40ccee24e8d1b84a080253dc689dcabab2bf9632708a2ff6ecde3
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\prefs.js
                • Size 6KB
                • SHA256 34c25272e974b43380e356134d2b07f22df059cda0746ee89e8c89ccf75c5ec3
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\prefs.js
                • Size 6KB
                • SHA256 26b47d81257b3e9901d8950b101a9450bb791b755eccaab15822bedea2c22456
                • MD5 SHA1 SHA512 SSDEEP TLSH

                sessionCheckpoints.json.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wvdcag27.default-release\sessionCheckpoints.json.tmp
                • Size 259B
                • SHA256 50a670fb78ff2712aae2c16d9499e01c15fddf24e229330d02a69b0527a38092
                • MD5 SHA1 SHA512 TLSH

                ProcessExplorer.shYw1ai9.zip.part

                • Path C:\Users\Admin\Downloads\ProcessExplorer.shYw1ai9.zip.part
                • Size 3.3MB
                • SHA256 47ff65944e87280a0d40e6eb7a6157f13f46d605df44ff794784b54d56795aa6
                • MD5 SHA1 SHA512 SSDEEP TLSH