Microsoft-Windows-Serial-ClassExtension

9 events across 1 channel

Event	Title	Channel	Sample
1000	The Serial WDF class extension has started.	Analytic	N
1001	The Serial WDF class extension failed to start (error Status).	Analytic	N
1002	Received request Request for IoControlCodeString.	Analytic	N
1003	Request Complete.	Analytic	N
1004	Transmitting request Request for Length byte(s).	Analytic	N
1005	Receiving request Request for Length byte(s).	Analytic	N
1006	Completed request Request for Length byte(s) with status Status.	Analytic	N
1007	Data.	Analytic	N
1008	EvtIoStop for request Request in queue Queue, invoke cancel.	Analytic	N

Event ID 1000: The Serial WDF class extension has started.

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Startupoftheserialclassextension

Description

The Serial WDF class extension has started. The control object name is ControlDeviceName.

Message #

The Serial WDF class extension has started.  The control object name is %1.

Fields #

Name	Description
`ControlDeviceName` UnicodeString
`Status` UInt32	NTSTATUS reference

Event ID 1001: The Serial WDF class extension failed to start (error Status).

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Startupoftheserialclassextension

Description

The Serial WDF class extension failed to start (error Status). The control object name is ControlDeviceName.

Message #

The Serial WDF class extension failed to start (error %2).  The control object name is %1.

Fields #

Name	Description
`ControlDeviceName` UnicodeString
`Status` UInt32	NTSTATUS reference

Event ID 1002: Received request Request for IoControlCodeString.

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: IOControlreceivedbytheserialclassextension
Opcode: Start

Description

Received request Request for IoControlCodeString.

Message #

Received request %1 for %2

Fields #

Name	Description
`Request` Pointer
`IoControlCodeString` UnicodeString

Event ID 1003: Request Complete.

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: IOControlreceivedbytheserialclassextension
Opcode: Stop

Description

Request Complete

Message #

%1 Complete

Fields #

Name	Description
`Request` Pointer
`IoControlCodeString` UnicodeString

Event ID 1004: Transmitting request Request for Length byte(s).

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Requestreceivedbytheserialclassextension
Opcode: Start

Description

Transmitting request Request for Length byte(s).

Message #

Transmitting request %1 for %2 byte(s)

Fields #

Name	Description
`Request` Pointer
`Length` UInt32

Event ID 1005: Receiving request Request for Length byte(s).

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Requestreceivedbytheserialclassextension
Opcode: Start

Description

Receiving request Request for Length byte(s).

Message #

Receiving request %1 for %2 byte(s)

Fields #

Name	Description
`Request` Pointer
`Length` UInt32

Event ID 1006: Completed request Request for Length byte(s) with status Status.

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Requestreceivedbytheserialclassextension
Opcode: Stop

Description

Completed request Request for Length byte(s) with status Status.

Message #

Completed request %1 for %2 byte(s) with status %3

Fields #

Name	Description
`Request` Pointer
`Length` UInt32
`Status` UInt32	NTSTATUS reference

Event ID 1007: Data.

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Requestreceivedbytheserialclassextension

Description

Data

Message #

%1

Fields #

Name	Description
`Data` UInt8

Event ID 1008: EvtIoStop for request Request in queue Queue, invoke cancel.

Provider: Microsoft-Windows-Serial-ClassExtension
Channel: Analytic
Task: Requestreceivedbytheserialclassextension

Description

EvtIoStop for request Request in queue Queue, invoke cancel.

Message #

EvtIoStop for request %1 in queue %2, invoke cancel

Fields #

Name	Description
`Request` Pointer
`Queue` Pointer

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 47bc9477-a8ba-452e-b951-4f2ed3593cf9

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

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.1, captured 2026-06-02
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.1150, captured 2026-06-02

`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)

Microsoft-Windows-Serial-ClassExtension

Event ID 1000: The Serial WDF class extension has started.

Description

Message #

Fields #

Event ID 1001: The Serial WDF class extension failed to start (error Status).

Description

Message #

Fields #

Event ID 1002: Received request Request for IoControlCodeString.

Description

Message #

Fields #

Event ID 1003: Request Complete.

Description

Message #

Fields #

Event ID 1004: Transmitting request Request for Length byte(s).

Description

Message #

Fields #

Event ID 1005: Receiving request Request for Length byte(s).

Description

Message #

Fields #

Event ID 1006: Completed request Request for Length byte(s) with status Status.

Description

Message #

Fields #

Event ID 1007: Data.

Description

Message #

Fields #

Event ID 1008: EvtIoStop for request Request in queue Queue, invoke cancel.

Description

Message #

Fields #

Provenance

Downloads