Active Directory: Kerberos Client

2 events across 1 channel

Event	Title	Channel	Sample
1	Kerberos Initialize Security Context Handler	ETW Trace	Y
2	Kerberos Initialize Security Context Handler	ETW Trace	Y

Event ID 1: Kerberos Initialize Security Context Handler

Provider: Active Directory: Kerberos Client
Channel: ETW Trace
Task: KerbInitSecurityContext
Opcode: Start
Source: Trace

Message #

Kerberos Initialize Security Context Handler

Example Event #

{
  "system": {
    "provider": "Active Directory: Kerberos Client",
    "guid": "{BBA3ADD2-C229-4CDB-AE2B-57EB6966B0C4}",
    "event_source_name": "",
    "event_id": 1,
    "version": 0,
    "level": 0,
    "task": 0,
    "opcode": 1,
    "keywords": "",
    "time_created": "2026-06-02T05:04:51.797+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 1132,
      "thread_id": 15272
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {},
  "message": "KerbInitSecurityContext"
}

Event ID 2: Kerberos Initialize Security Context Handler

Provider: Active Directory: Kerberos Client
Channel: ETW Trace
Also via: realtime ETW trace
Task: KerbInitSecurityContext
Opcode: End
Source: Trace

Message #

Kerberos Initialize Security Context Handler

Fields #

Name	Description
`Status` mof:UInt32	NTSTATUS reference
`CredSource` mof:String
`DomainName` mof:String
`UserName` mof:String
`Target` mof:String
`ExtError` mof:UInt32
`klininfo` mof:UInt32

Example Event #

{
  "system": {
    "provider": "Active Directory: Kerberos Client",
    "guid": "{BBA3ADD2-C229-4CDB-AE2B-57EB6966B0C4}",
    "event_source_name": "",
    "event_id": 2,
    "version": 0,
    "level": 0,
    "task": 0,
    "opcode": 2,
    "keywords": "",
    "time_created": "2026-06-02T05:04:51.798+00:00",
    "event_record_id": 0,
    "correlation": {},
    "execution": {
      "process_id": 1132,
      "thread_id": 15272
    },
    "channel": "ETW Trace",
    "computer": "JD-DC01-2022",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "CredSource": "0E0043006F006E007400650078007400",
    "DomainName": "18004C0055004400550053002E0044004F004D00410049004E00",
    "Status": 590610,
    "Target": "70006C006400610070002F004A0044002D0044004300300031002D0032003000320032002E006C0075006400750073002E0064006F006D00610069006E002F006C0075006400750073002E0064006F006D00610069006E0040004C0055004400550053002E0044004F004D00410049004E00",
    "UserName": "1A004A0044002D0044004300300031002D0032003000320032002400"
  },
  "message": "KerbInitSecurityContext"
}

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 {BBA3ADD2-C229-4CDB-AE2B-57EB6966B0C4}

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: MSKerbTrace
Win11-26200.6584, schema read from the WMI MOF class, captured 2026-06-02
MOF class: MSKerbTrace

`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)

Active Directory: Kerberos Client

Event ID 1: Kerberos Initialize Security Context Handler

Message #

Example Event #

Event ID 2: Kerberos Initialize Security Context Handler

Message #

Fields #

Example Event #

Provenance

Keyboard shortcuts

Search operators