Microsoft-Windows-Kerberos-KdcProxy

26 events across 1 channel

Event	Title	Channel	Sample
1	Service stopped with a failure: error code ErrorCode.	Operational	N
2	Failed to initialize Group Policy: error code ErrorCode.	Operational	N
3	Failed to read Group Policy: error code ErrorCode.	Operational	N
4	Failed to start the HTTP service: error code ErrorCode.	Operational	N
5	Service failed to register UrlPrefix UrlPrefix: error code ErrorCode.	Operational	N
6	Service failed to start because system is not domain-joined: error code …	Operational	N
100	HttpReceiveHttpRequest API failed to receive an HTTP request from the network: …	Operational	N
101	Service failed to create a new IO object to service an HTTP request from the …	Operational	N
102	Failed to unpack PduType: error code ErrorCode.	Operational	N
103	Failed to locate a domain controller in domain TargetDomain with locator flags …	Operational	N
200	Retry (RetryNumber) connection to KDC in TargetDomain.	Operational	N
300	Service started	Operational	N
301	Service stopped	Operational	N
302	Initialized Group Policy successfully	Operational	N
303	Read Group Policy successfully	Operational	N
304	HTTP service started successfully	Operational	N
305	HTTP service stopped	Operational	N
306	Rediscover KDC for domain TargetDomain.	Operational	N
307	Hash table was expanded from (BeginNonEmptyBuckets/BeginTotalBuckets buckets, …	Operational	N
308	Hash table was contracted from (BeginNonEmptyBuckets/BeginTotalBuckets buckets, …	Operational	N
309	Rediscovered KDC KDCAddress(KDCName) for domain TargetDomain.	Operational	N
400	An HTTP request was received	Operational	N
401	Client certificate is required to establish an HTTP connection	Operational	N
402	Client certificate is not valid to establish an HTTP connection: trust status …	Operational	N
403	The account (Domain: DomainName, User: UserName) has NumerOfFailures password …	Operational	N
404	The account (Domain: DomainName, User: UserName) is rejected due to the usage of …	Operational	N

Event ID 1: Service stopped with a failure: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Service stopped with a failure: error code ErrorCode.

Message #

Service stopped with a failure: error code %1

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 2: Failed to initialize Group Policy: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Failed to initialize Group Policy: error code ErrorCode.

Message #

Failed to initialize Group Policy: error code %1

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 3: Failed to read Group Policy: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Failed to read Group Policy: error code ErrorCode.

Message #

Failed to read Group Policy: error code %1

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 4: Failed to start the HTTP service: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Failed to start the HTTP service: error code ErrorCode.

Message #

Failed to start the HTTP service: error code %1

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 5: Service failed to register UrlPrefix UrlPrefix: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Service failed to register UrlPrefix UrlPrefix: error code ErrorCode. Contact your administrator to make sure UrlPrefix is properly reserved.

Message #

Service failed to register UrlPrefix %1: error code %2. Contact your administrator to make sure %1 is properly reserved.

Fields #

Name	Description
`UrlPrefix` UnicodeString
`ErrorCode` UInt32

Event ID 6: Service failed to start because system is not domain-joined: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Service failed to start because system is not domain-joined: error code ErrorCode.

Message #

Service failed to start because system is not domain-joined: error code %1.

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 100: HttpReceiveHttpRequest API failed to receive an HTTP request from the network: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

HttpReceiveHttpRequest API failed to receive an HTTP request from the network: error code ErrorCode. This may indicate a failure where no future HTTP requests can be received by the service.

Message #

HttpReceiveHttpRequest API failed to receive an HTTP request from the network: error code %1. This may indicate a failure where no future HTTP requests can be received by the service.

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 101: Service failed to create a new IO object to service an HTTP request from the network: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

Service failed to create a new IO object to service an HTTP request from the network: error code ErrorCode. This may indicate a failure where no future HTTP requests can be received by the service.

Message #

Service failed to create a new IO object to service an HTTP request from the network: error code %1. This may indicate a failure where no future HTTP requests can be received by the service.

Fields #

Name	Description
`ErrorCode` UInt32

Event ID 102: Failed to unpack PduType: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

Failed to unpack PduType: error code ErrorCode.

Message #

Failed to unpack %1: error code %2

Fields #

Name	Description
`PduType` UnicodeString
`ErrorCode` UInt32

Event ID 103: Failed to locate a domain controller in domain TargetDomain with locator flags Flags: error code ErrorCode.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

Failed to locate a domain controller in domain TargetDomain with locator flags Flags: error code ErrorCode.

Message #

Failed to locate a domain controller in domain %1 with locator flags %2: error code %3.

Fields #

Name	Description
`TargetDomain` UnicodeString
`Flags` UInt32
`ErrorCode` UInt32

Event ID 200: Retry (RetryNumber) connection to KDC in TargetDomain.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Retry (RetryNumber) connection to KDC in TargetDomain.

Message #

Retry (%1) connection to KDC in %2

Fields #

Name	Description
`RetryNumber` UInt32
`TargetDomain` UnicodeString

Event ID 300: Service started

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE
Opcode: Start

Description

Service started.

Message #

Service started

Event ID 301: Service stopped

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE
Opcode: Stop

Description

Service stopped.

Message #

Service stopped

Event ID 302: Initialized Group Policy successfully

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Initialized Group Policy successfully.

Message #

Initialized Group Policy successfully

Event ID 303: Read Group Policy successfully

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Read Group Policy successfully.

Message #

Read Group Policy successfully

Event ID 304: HTTP service started successfully

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

HTTP service started successfully.

Message #

HTTP service started successfully

Event ID 305: HTTP service stopped

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

HTTP service stopped.

Message #

HTTP service stopped

Event ID 306: Rediscover KDC for domain TargetDomain.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Rediscover KDC for domain TargetDomain.

Message #

Rediscover KDC for domain %1

Fields #

Name	Description
`TargetDomain` UnicodeString

Event ID 307: Hash table was expanded from (BeginNonEmptyBuckets/BeginTotalBuckets buckets, BeginTotalEntries entries) to (NonEmptyBuckets/TotalBuckets buckets, TotalEntries entries) in TimeSpent milliseconds.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Hash table was expanded from (BeginNonEmptyBuckets/BeginTotalBuckets buckets, BeginTotalEntries entries) to (NonEmptyBuckets/TotalBuckets buckets, TotalEntries entries) in TimeSpent milliseconds.

Message #

Hash table was expanded from (%1/%2 buckets, %3 entries) to (%4/%5 buckets, %6 entries) in %7 milliseconds

Fields #

Name	Description
`BeginNonEmptyBuckets` UInt32
`BeginTotalBuckets` UInt32
`BeginTotalEntries` UInt32
`NonEmptyBuckets` UInt32
`TotalBuckets` UInt32
`TotalEntries` UInt32
`TimeSpent` UInt32

Event ID 308: Hash table was contracted from (BeginNonEmptyBuckets/BeginTotalBuckets buckets, BeginTotalEntries entries) to (NonEmptyBuckets/TotalBuckets buckets, TotalEntries entries) in TimeSpent milliseconds.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Hash table was contracted from (BeginNonEmptyBuckets/BeginTotalBuckets buckets, BeginTotalEntries entries) to (NonEmptyBuckets/TotalBuckets buckets, TotalEntries entries) in TimeSpent milliseconds.

Message #

Hash table was contracted from (%1/%2 buckets, %3 entries) to (%4/%5 buckets, %6 entries) in %7 milliseconds

Fields #

Name	Description
`BeginNonEmptyBuckets` UInt32
`BeginTotalBuckets` UInt32
`BeginTotalEntries` UInt32
`NonEmptyBuckets` UInt32
`TotalBuckets` UInt32
`TotalEntries` UInt32
`TimeSpent` UInt32

Event ID 309: Rediscovered KDC KDCAddress(KDCName) for domain TargetDomain.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_SERVICE

Description

Rediscovered KDC KDCAddress(KDCName) for domain TargetDomain.

Message #

Rediscovered KDC %3(%2) for domain %1

Fields #

Name	Description
`TargetDomain` UnicodeString
`KDCName` UnicodeString
`KDCAddress` UnicodeString

Event ID 400: An HTTP request was received

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

An HTTP request was received.

Message #

An HTTP request was received

Event ID 401: Client certificate is required to establish an HTTP connection

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

Client certificate is required to establish an HTTP connection.

Message #

Client certificate is required to establish an HTTP connection

Event ID 402: Client certificate is not valid to establish an HTTP connection: trust status TrustStatus.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

Client certificate is not valid to establish an HTTP connection: trust status TrustStatus.

Message #

Client certificate is not valid to establish an HTTP connection: trust status %1

Fields #

Name	Description
`TrustStatus` UInt32

Event ID 403: The account (Domain: DomainName, User: UserName) has NumerOfFailures password failures.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

The account (Domain: DomainName, User: UserName) has NumerOfFailures password failures. It is locked out for the next LockedOutPeriod seconds.

Message #

The account (Domain: %1, User: %2) has %3 password failures. It is locked out for the next %4 seconds

Fields #

Name	Description
`DomainName` UnicodeString
`UserName` UnicodeString
`NumerOfFailures` UInt32
`LockedOutPeriod` UInt32

Event ID 404: The account (Domain: DomainName, User: UserName) is rejected due to the usage of an unarmored Kerberos message.

Provider: Microsoft-Windows-Kerberos-KdcProxy
Channel: Operational
Task: TASK_HTTP

Description

The account (Domain: DomainName, User: UserName) is rejected due to the usage of an unarmored Kerberos message.

Message #

The account (Domain: %1, User: %2) is rejected due to the usage of an unarmored Kerberos message

Fields #

Name	Description
`DomainName` UnicodeString
`UserName` UnicodeString

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 d3f8787e-656f-4876-9ebd-6f5e3cb0a45b

Defined in kpssvc.dll, which carries the event manifest.

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.3807, captured 2026-06-02

Downloads

Microsoft-Windows-Kerberos-KdcProxy registered manifest XML (in the WS2022-20348.4893 manifest pack, 1.9 MB) manifest-xml

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`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)