Microsoft-Windows-Hyper-V-KMCL-Child

5 events across 1 channel

Event	Title	Channel
1	Fetching a packet from vmbus.	Analytic
2	Sending a packet to vmbus.	Analytic
3	Finish fetching packets from vmbus.	Analytic
4	Incoming packet quota is hit.	Analytic
5	DPC cycle limit is hit.	Analytic

Event ID 1: Fetching a packet from vmbus.

Provider: Microsoft-Windows-Hyper-V-KMCL-Child
Channel: Analytic
Task: Queueandpacketeventtracing.
Opcode: Fetchasinglepacketfromtheringbuffer.

Description

Fetching a packet from vmbus.

Message #

Fetching a packet from vmbus.

Fields #

Name	Description
`VmId` GUID
`InstanceId` GUID
`TransactionId` UInt64
`IsCompletionPacket` Boolean
`Channel` UInt16

Event ID 2: Sending a packet to vmbus.

Provider: Microsoft-Windows-Hyper-V-KMCL-Child
Channel: Analytic
Task: Queueandpacketeventtracing.
Opcode: Puttingapackettotheringbuffer.

Description

Sending a packet to vmbus.

Message #

Sending a packet to vmbus.

Fields #

Name	Description
`VmId` GUID
`InstanceId` GUID
`TransactionId` UInt64
`IsCompletionPacket` Boolean
`Channel` UInt16

Event ID 3: Finish fetching packets from vmbus.

Provider: Microsoft-Windows-Hyper-V-KMCL-Child
Channel: Analytic
Task: Queueandpacketeventtracing.
Opcode: Finishfetchingpacketsfromtheringbuffer.

Description

Finish fetching packets from vmbus.

Message #

Finish fetching packets from vmbus.

Fields #

Name	Description
`VmId` GUID
`InstanceId` GUID
`PacketFetched` UInt32
`MaximumFetchAllowed` UInt32
`Channel` UInt16

Event ID 4: Incoming packet quota is hit.

Provider: Microsoft-Windows-Hyper-V-KMCL-Child
Channel: Analytic
Task: Queueandpacketeventtracing.
Opcode: Nomorepacketscanbefetchedbecausethequotaismet.

Description

Incoming packet quota is hit.

Message #

Incoming packet quota is hit.

Fields #

Name	Description
`VmId` GUID
`InstanceId` GUID
`Channel` UInt16

Event ID 5: DPC cycle limit is hit.

Provider: Microsoft-Windows-Hyper-V-KMCL-Child
Channel: Analytic
Task: Queueandpacketeventtracing.
Opcode: DPCcyclelimitisexceeded.

Description

DPC cycle limit is hit.

Message #

DPC cycle limit is hit.

Fields #

Name	Description
`VmId` GUID
`InstanceId` GUID
`Channel` UInt16

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 16d90d71-caca-5cd9-a618-8210d93015f3

Defined in vmbkmcl.sys, the binary that emits these events.

Observed on:

WS2022-20348.4893 · schema read from the registered manifest · binary version 10.0.20348.4294 · captured 2026-06-02
Win11-26200.6584 · schema read from the registered manifest · binary version 10.0.26100.5074 · captured 2026-06-02

Downloads

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)

Microsoft-Windows-Hyper-V-KMCL-Child

Event ID 1: Fetching a packet from vmbus.

Description

Message #

Fields #

Event ID 2: Sending a packet to vmbus.

Description

Message #

Fields #

Event ID 3: Finish fetching packets from vmbus.

Description

Message #

Fields #

Event ID 4: Incoming packet quota is hit.

Description

Message #

Fields #

Event ID 5: DPC cycle limit is hit.

Description

Message #

Fields #

Provenance

Downloads

Credits

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