Thread Pool

17 events across 1 channel

Event	Title	Channel
32	ThreadPool	ETW Trace
33	ThreadPool	ETW Trace
34	ThreadPool	ETW Trace
35	ThreadPool	ETW Trace
36	TPCBCancel	ETW Trace
37	TP_V2_PoolCreateClose	ETW Trace
38	TP_V2_PoolCreateClose	ETW Trace
39	TP_V2_ThreadSet	ETW Trace
40	TP_V2_ThreadSet	ETW Trace
41	TP_V2_WTNodeSwitch	ETW Trace
42	TP_V2_TimerSet	ETW Trace
43	TP_V2_TimerCancelled	ETW Trace
44	TP_V2_TimerSetNtTimer	ETW Trace
45	TP_V2_TimerExpirationGroup	ETW Trace
46	TP_V2_TimerExpirationGroup	ETW Trace
47	TP_V2_TimerExpirationGroup	ETW Trace
48	TP_V2_TimerExpiration	ETW Trace

Event ID 32: ThreadPool

Provider: Thread Pool
Channel: ETW Trace
Also via: realtime ETW trace
Task: ThreadPool
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`TaskId` mof:UInt32
`CallbackFunction` mof:UInt32
`CallbackContext` mof:UInt32
`SubProcessTag` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Thread Pool",
    "guid": "{C861D0E2-A2C1-4D36-9F9C-970BAB943A12}",
    "event_source_name": "",
    "event_id": 32,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 32,
    "keywords": "",
    "time_created": "2026-06-02T04:02:05.309+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 3756,
      "thread_id": 7996
    },
    "channel": "ETW Trace",
    "computer": "DESKTOP-FF3N5XK",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "CallbackContext": "0x1FEAC907ED0",
    "CallbackFunction": "0x7FFD14FA0A10",
    "PoolId": "0x1FEAC103280",
    "SubProcessTag": "0xFB",
    "TaskId": "0x1FEAC8ED898"
  },
  "message": "ThreadPool"
}

Event ID 33: ThreadPool

Provider: Thread Pool
Channel: ETW Trace
Also via: realtime ETW trace
Task: ThreadPool
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`TaskId` mof:UInt32
`CallbackFunction` mof:UInt32
`CallbackContext` mof:UInt32
`SubProcessTag` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Thread Pool",
    "guid": "{C861D0E2-A2C1-4D36-9F9C-970BAB943A12}",
    "event_source_name": "",
    "event_id": 33,
    "version": 3,
    "level": 0,
    "task": 0,
    "opcode": 33,
    "keywords": "",
    "time_created": "2026-06-02T04:02:05.309+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 3756,
      "thread_id": 10144
    },
    "channel": "ETW Trace",
    "computer": "DESKTOP-FF3N5XK",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "CallbackContext": "0x1FEAC907ED0",
    "CallbackFunction": "0x7FFD14FA0A10",
    "PoolId": "0x1FEAC103280",
    "SubProcessTag": "0xFB",
    "TaskId": "0x1FEAC8ED898"
  },
  "message": "ThreadPool"
}

Event ID 34: ThreadPool

Provider: Thread Pool
Channel: ETW Trace
Also via: realtime ETW trace
Task: ThreadPool
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`TaskId` mof:UInt32
`CallbackFunction` mof:UInt32
`CallbackContext` mof:UInt32
`SubProcessTag` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Thread Pool",
    "guid": "{C861D0E2-A2C1-4D36-9F9C-970BAB943A12}",
    "event_source_name": "",
    "event_id": 34,
    "version": 2,
    "level": 0,
    "task": 0,
    "opcode": 34,
    "keywords": "",
    "time_created": "2026-06-02T04:02:05.303+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 944,
      "thread_id": 11520
    },
    "channel": "ETW Trace",
    "computer": "DESKTOP-FF3N5XK",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "CallbackContext": "0x34",
    "CallbackFunction": "0x7FFD282E51D0",
    "PoolId": "0x21546103280",
    "SubProcessTag": "0x0",
    "TaskId": "0x21546103BF8"
  },
  "message": "ThreadPool"
}

Event ID 35: ThreadPool

Provider: Thread Pool
Channel: ETW Trace
Also via: realtime ETW trace
Task: ThreadPool
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`TaskId` mof:UInt32
`CallbackFunction` mof:UInt32
`CallbackContext` mof:UInt32
`SubProcessTag` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Thread Pool",
    "guid": "{C861D0E2-A2C1-4D36-9F9C-970BAB943A12}",
    "event_source_name": "",
    "event_id": 35,
    "version": 3,
    "level": 0,
    "task": 0,
    "opcode": 35,
    "keywords": "",
    "time_created": "2026-06-02T04:02:05.303+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 944,
      "thread_id": 11520
    },
    "channel": "ETW Trace",
    "computer": "DESKTOP-FF3N5XK",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "CallbackContext": "0x34",
    "CallbackFunction": "0x7FFD282E51D0",
    "PoolId": "0x21546103280",
    "SubProcessTag": "0x0",
    "TaskId": "0x21546103BF8"
  },
  "message": "ThreadPool"
}

Event ID 36: TPCBCancel

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`TaskId` mof:UInt32
`CallbackFunction` mof:UInt32
`CallbackContext` mof:UInt32
`SubProcessTag` mof:UInt32
`CancelCount` mof:UInt32

Event ID 37: TP_V2_PoolCreateClose

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32

Event ID 38: TP_V2_PoolCreateClose

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32

Event ID 39: TP_V2_ThreadSet

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`ThreadNum` mof:UInt32

Event ID 40: TP_V2_ThreadSet

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`ThreadNum` mof:UInt32

Event ID 41: TP_V2_WTNodeSwitch

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`PoolId` mof:UInt32
`CurrentNode` mof:UInt32
`NextNode` mof:UInt32
`CurrentGroup` mof:UInt16
`NextGroup` mof:UInt16
`CurrentWorkerCount` mof:UInt32
`NextWorkerCount` mof:UInt32

Event ID 42: TP_V2_TimerSet

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`DueTime` mof:UInt64
`SubQueue` mof:UInt32
`Timer` mof:UInt32
`Period` mof:UInt32
`WindowLength` mof:UInt32
`Absolute` mof:UInt32

Event ID 43: TP_V2_TimerCancelled

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`SubQueue` mof:UInt32
`Timer` mof:UInt32

Event ID 44: TP_V2_TimerSetNtTimer

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`DueTime` mof:UInt64
`SubQueue` mof:UInt32
`TolerableDelay` mof:UInt32

Event ID 45: TP_V2_TimerExpirationGroup

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`SubQueue` mof:UInt32

Event ID 46: TP_V2_TimerExpirationGroup

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`SubQueue` mof:UInt32

Event ID 47: TP_V2_TimerExpirationGroup

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`SubQueue` mof:UInt32

Event ID 48: TP_V2_TimerExpiration

Provider: Thread Pool
Channel: ETW Trace
Source: Trace

Fields #

Name	Description
`DueTime` mof:UInt64
`SubQueue` mof:UInt32
`Timer` mof:UInt32
`Period` mof:UInt32
`WindowLength` mof:UInt32

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 {C861D0E2-A2C1-4D36-9F9C-970BAB943A12}

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.
Win11-26200.6584 · 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: ThreadPool
Win11-26200.6584 · schema read from the WMI MOF class · captured 2026-06-02
MOF class: ThreadPool

Credits

Microsoft - authored the ETW manifests and PDBs the schema comes from
jdu2600 - the event-schema TSV format this catalog adopted
nasbench - the tool that dumps registered providers and manifests

`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:`)
`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)