Windows Notification Facility Provider

5 events across 1 channel

Event	Title	Channel	Sample
32	WNFSubUnsub	ETW Trace	Y
33	WNFSubUnsub	ETW Trace	Y
34	WNFCallback	ETW Trace	Y
35	WNFPublish	ETW Trace	Y
36	WNFNameSubRundown	ETW Trace	Y

Event ID 32: WNFSubUnsub

Provider: Windows Notification Facility Provider
Channel: ETW Trace
Also via: realtime ETW trace
Source: Trace

Fields #

Name	Description
`StateName` mof:UInt64
`Subscription` mof:UInt32
`NameSub` mof:UInt32
`Callback` mof:UInt32
`RefCount` mof:UInt32
`DeliveryFlags` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Windows Notification Facility Provider",
    "guid": "{42695762-EA50-497A-9068-5CBBB35E0B95}",
    "event_source_name": "",
    "event_id": 32,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 32,
    "keywords": "",
    "time_created": "2026-06-02T04:02:19.162+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 5388,
      "thread_id": 13968
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "Callback": "0x7FF9FAAD7D90",
    "DeliveryFlags": 17,
    "NameSub": "0x2088413B880",
    "RefCount": 1,
    "StateName": 541872588846794869,
    "Subscription": "0x2088413B7D0"
  },
  "message": ""
}

Event ID 33: WNFSubUnsub

Provider: Windows Notification Facility Provider
Channel: ETW Trace
Also via: realtime ETW trace
Source: Trace

Fields #

Name	Description
`StateName` mof:UInt64
`Subscription` mof:UInt32
`NameSub` mof:UInt32
`Callback` mof:UInt32
`RefCount` mof:UInt32
`DeliveryFlags` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Windows Notification Facility Provider",
    "guid": "{42695762-EA50-497A-9068-5CBBB35E0B95}",
    "event_source_name": "",
    "event_id": 33,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 33,
    "keywords": "",
    "time_created": "2026-06-02T04:02:19.172+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 1400,
      "thread_id": 11792
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "Callback": "0x7FF9FBB49DA0",
    "DeliveryFlags": 8,
    "NameSub": "0x20E5C6F43D0",
    "RefCount": 2,
    "StateName": 4739561890658924613,
    "Subscription": "0x20E5B668000"
  },
  "message": ""
}

Event ID 34: WNFCallback

Provider: Windows Notification Facility Provider
Channel: ETW Trace
Also via: realtime ETW trace
Source: Trace

Fields #

Name	Description
`StateName` mof:UInt64
`Subscription` mof:UInt32
`NameSub` mof:UInt32
`Callback` mof:UInt32
`ChangeStamp` mof:UInt32
`DeliveryFlags` mof:UInt32
`Return` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Windows Notification Facility Provider",
    "guid": "{42695762-EA50-497A-9068-5CBBB35E0B95}",
    "event_source_name": "",
    "event_id": 34,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 34,
    "keywords": "",
    "time_created": "2026-06-02T04:02:19.172+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 1120,
      "thread_id": 13620
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "Callback": "0x7FF9F8CA9BD0",
    "ChangeStamp": 16,
    "DeliveryFlags": 1,
    "NameSub": "0x19E9CC7C270",
    "Return": 0,
    "StateName": 4739561890658924613,
    "Subscription": "0x19E9CC84180"
  },
  "message": ""
}

Event ID 35: WNFPublish

Provider: Windows Notification Facility Provider
Channel: ETW Trace
Also via: realtime ETW trace
Source: Trace

Fields #

Name	Description
`StateName` mof:UInt64
`DataLength` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Windows Notification Facility Provider",
    "guid": "{42695762-EA50-497A-9068-5CBBB35E0B95}",
    "event_source_name": "",
    "event_id": 35,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 35,
    "keywords": "",
    "time_created": "2026-06-02T04:02:19.171+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 1400,
      "thread_id": 10676
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "DataLength": 244,
    "StateName": 4739561890658924613
  },
  "message": ""
}

Event ID 36: WNFNameSubRundown

Provider: Windows Notification Facility Provider
Channel: ETW Trace
Also via: realtime ETW trace
Source: Trace

Fields #

Name	Description
`StateName` mof:UInt64
`NameSub` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Windows Notification Facility Provider",
    "guid": "{42695762-EA50-497A-9068-5CBBB35E0B95}",
    "event_source_name": "",
    "event_id": 36,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 36,
    "keywords": "",
    "time_created": "2026-06-02T04:02:19.172+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 1400,
      "thread_id": 3940
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "NameSub": "0x20E5C6F43D0",
    "StateName": 4739561890658924613
  },
  "message": ""
}

Provenance

Where this provider's schema came from, and which Windows build it was observed on. Windows can change a provider's event schema between builds, so use this to judge whether it matches the build you collect from.

ETW provider GUID {42695762-EA50-497A-9068-5CBBB35E0B95}

Observed on:

WS2025-26100.0, schema read from the WMI MOF class, captured 2026-02-26
Taken from Windows installation media (build 26100.1), not a patched system, so the exact update level is unknown.
WS2022-20348.4893, sample captured from a live trace, captured 2026-06-02
WS2022-20348.4893, schema read from the WMI MOF class, captured 2026-06-02
MOF class: WnfProvider
Win11-26200.6584, schema read from the WMI MOF class, captured 2026-06-02
MOF class: WnfProvider

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

Windows Notification Facility Provider

Event ID 32: WNFSubUnsub

Fields #

Example Event #

Event ID 33: WNFSubUnsub

Fields #

Example Event #

Event ID 34: WNFCallback

Fields #

Example Event #

Event ID 35: WNFPublish

Fields #

Example Event #

Event ID 36: WNFNameSubRundown

Fields #

Example Event #

Provenance

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