Analysis

  • user interaction
    yes
  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    25/10/2026, 14:03

General

  • Target
    $PLUGINSDIR/SysRestore.dll
  • Size 5KB
  • Sample261025-rc5yeahw8l
  • SHA256 c686b4df9b4db50fc1ddb7be4cd50d4b1d75894288f4dc50571b79937d7c0d7e
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
3/10

Malware Config

Signatures

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

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

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

  • System Time Discovery 1 TTPs 1 IoCs

    Adversary may gather the system time and/or time zone settings from a local or remote system.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\SysRestore.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2964
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\SysRestore.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:780
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 780 -s 600
        3⤵
        • Program crash
        PID:3684
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 780 -ip 780
    1⤵
      PID:3828
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:988
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=140.0.7339.81 --initial-client-data=0x11c,0x120,0x124,0xf8,0x128,0x7ffea248c728,0x7ffea248c734,0x7ffea248c740
        2⤵
          PID:3308
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-pre-read-main-dll --force-high-res-timeticks=disabled --gpu-preferences=SAAAAAAAAADgAAAIAAAAAAAAAAAAAGAAAQAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --metrics-shmem-handle=1756,i,4346001384404154534,1226061763624797533,262144 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=2024 /prefetch:2
          2⤵
            PID:3780
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=1604,i,3360236315932333204,602300572712264963,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=2288 /prefetch:3
            2⤵
            • System Time Discovery
            PID:1404
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=2416,i,8012440807386754126,3739951949048272763,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=2564 /prefetch:8
            2⤵
              PID:2200
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --metrics-shmem-handle=3224,i,8915074017813316181,5252588264074346072,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=3248 /prefetch:1
              2⤵
                PID:376
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --metrics-shmem-handle=3196,i,183908076824551354,16171648278624623977,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=3208 /prefetch:1
                2⤵
                  PID:4900
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --extension-process --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --metrics-shmem-handle=4388,i,15319893518650805844,9980795552845688113,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=4392 /prefetch:2
                  2⤵
                    PID:3668
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --metrics-shmem-handle=4804,i,4460893378753359287,2502306766071623918,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=4720 /prefetch:1
                    2⤵
                      PID:4224
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=5540,i,9167243033098491563,5698371697311837712,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=5344 /prefetch:8
                      2⤵
                        PID:2460
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --metrics-shmem-handle=5820,i,12641380189821203628,16802635432149768537,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=5888 /prefetch:1
                        2⤵
                          PID:2072
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --metrics-shmem-handle=5924,i,13227308381292042605,7889242560469006917,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=3972 /prefetch:1
                          2⤵
                            PID:4760
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --lang=en-US --service-sandbox-type=audio --force-high-res-timeticks=disabled --metrics-shmem-handle=6108,i,10825523532213846810,2241347987425364901,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=6064 /prefetch:8
                            2⤵
                              PID:3276
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=video_capture.mojom.VideoCaptureService --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=6120,i,5202383282805022120,12219382411105069386,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=6072 /prefetch:8
                              2⤵
                              • Modifies registry class
                              PID:1744
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5808,i,18334330813347763721,10666161608624262468,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=5832 /prefetch:8
                              2⤵
                                PID:2428
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=6008,i,14470436237412213783,1528674357385254415,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=3400 /prefetch:8
                                2⤵
                                  PID:3408
                                • C:\Program Files\Google\Chrome\Application\chrome.exe
                                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=3272,i,7881457383413725020,330907511450598926,524288 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=5876 /prefetch:8
                                  2⤵
                                    PID:4752
                                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=18 --metrics-shmem-handle=4416,i,16315727984948747876,15139518615480292661,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=4404 /prefetch:1
                                    2⤵
                                      PID:4028
                                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=19 --metrics-shmem-handle=244,i,5443802967870317380,5571278178364875109,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=3400 /prefetch:1
                                      2⤵
                                        PID:4140
                                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=20 --metrics-shmem-handle=3220,i,783712720543611031,3930373594230867292,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=6284 /prefetch:1
                                        2⤵
                                          PID:2080
                                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=21 --metrics-shmem-handle=3200,i,13082314281482628255,17430583138291830305,2097152 --field-trial-handle=2028,i,9187155673235820777,15292019931607613070,262144 --variations-seed-version=20260911-010032.103000-production --mojo-platform-channel-handle=3448 /prefetch:1
                                          2⤵
                                            PID:4204
                                        • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
                                          "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
                                          1⤵
                                            PID:4216
                                          • C:\Windows\system32\svchost.exe
                                            C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                                            1⤵
                                              PID:892

                                            Network

                                                  MITRE ATT&CK Enterprise v16

                                                  Replay Monitor

                                                  Loading Replay Monitor...

                                                  Downloads

                                                  6b620240-ca22-487c-a3ae-c1a2ed12ae9b.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\6b620240-ca22-487c-a3ae-c1a2ed12ae9b.tmp
                                                  • Size 130KB
                                                  • SHA256 4b3598894918bc30b89459a72df31e1161a3300a5bdaa5d0dbb53aa2a939e6af
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  7a86581e-80f9-48e8-9807-e784a13d7ca8.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\7a86581e-80f9-48e8-9807-e784a13d7ca8.tmp
                                                  • Size 270KB
                                                  • SHA256 5be3469c28275e6bb452b11f7e33d488b0b3663cf6ddc653c093f2a8d698c6e4
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  0c9baff7-905d-4a01-a2c2-0a5411321a49.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\0c9baff7-905d-4a01-a2c2-0a5411321a49.tmp
                                                  • Size 6B
                                                  • SHA256 4489f9e3e454748b3521eb214e0a5694d562cff3d9ff511cb456953c8f534c00
                                                  • MD5 SHA1 SHA512

                                                  0f284f82-b378-431d-b3c5-a6ee258c7c7c.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\0f284f82-b378-431d-b3c5-a6ee258c7c7c.tmp
                                                  • Size 17KB
                                                  • SHA256 d6ef7be1fdf322a98e133d0f16a9689d7b7e779ed80b3b246f7f0abd127671a4
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  45339973-9aed-4e21-bfcc-b946a2a9fbf8.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\45339973-9aed-4e21-bfcc-b946a2a9fbf8.tmp
                                                  • Size 414B
                                                  • SHA256 c1f41fc705a1ef73c1793820508ead4048d366ac0a8b3a04294380fd074385a0
                                                  • MD5 SHA1 SHA512 TLSH

                                                  temp-index

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\temp-index
                                                  • Size 984B
                                                  • SHA256 8e01cf3fdb000a05bbc0edb3cb44c668bfa2a5d55a87236e1cd94da1c0c221b0
                                                  • MD5 SHA1 SHA512 TLSH

                                                  7f91d2dc-9259-45cd-95e1-bb7c06d44a12.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\7f91d2dc-9259-45cd-95e1-bb7c06d44a12.tmp
                                                  • Size 6KB
                                                  • SHA256 51beaf217bd925ee5499dae174c82faa78882bbab89bedd18bab5eb7c8993100
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  a529b3ae-8ea0-40b6-9fff-ffdda2e00a79.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\a529b3ae-8ea0-40b6-9fff-ffdda2e00a79.tmp
                                                  • Size 2B
                                                  • SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
                                                  • MD5 SHA1 SHA512

                                                  temp-index

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Service Worker\ScriptCache\index-dir\temp-index
                                                  • Size 120B
                                                  • SHA256 d2645e0763020dc501cb0f65b7ad026d8f1cb024df10e60fd3f04214c54c9595
                                                  • MD5 SHA1 SHA512 TLSH

                                                  the-real-index

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Service Worker\ScriptCache\index-dir\the-real-index
                                                  • Size 96B
                                                  • SHA256 905d724a79f1eb0e0bf8e50a7001db74e51706d1ec3c333e9f4de390521f229f
                                                  • MD5 SHA1 SHA512 TLSH

                                                  temp-index

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Shared Dictionary\cache\index-dir\temp-index
                                                  • Size 96B
                                                  • SHA256 e3e5bbb213d609b371ecffa1389ad2e095b1f3db7229cb4f1121d49d61aa57fe
                                                  • MD5 SHA1 SHA512 TLSH

                                                  c9cf012f-daf6-411c-b662-9126511ccc69.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\c9cf012f-daf6-411c-b662-9126511ccc69.tmp
                                                  • Size 12KB
                                                  • SHA256 ce64395d5d134d798b9abfedaa029c8ea21bfd438af6dfb277dd2cd014710bce
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  cda8c001-34cc-4b9b-bfff-b6b25fc8dc24.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\cda8c001-34cc-4b9b-bfff-b6b25fc8dc24.tmp
                                                  • Size 13KB
                                                  • SHA256 455f6b8da087def1c3f2c43cd76815d52f9e373b905cd82790d1678d9e1bae65
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  ed0c0fb8-6e4c-4bf4-976a-4e0f699b98cd.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\ed0c0fb8-6e4c-4bf4-976a-4e0f699b98cd.tmp
                                                  • Size 13KB
                                                  • SHA256 3d855fde990ddb6142bef80e1b8209e3fa44ad7ec78e2ec7a6796bfcef566aed
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH

                                                  e8fe4d61-5dd4-4636-b0ef-5987ca47082f.tmp

                                                  • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\e8fe4d61-5dd4-4636-b0ef-5987ca47082f.tmp
                                                  • Size 269KB
                                                  • SHA256 735f6004cc3d796a0526b2fe6be4793a279ec702ecebfed820a6316cfd3ccaac
                                                  • MD5 SHA1 SHA512 SSDEEP TLSH