Microsoft-Windows-Defrag

3 events across 1 channel

Event	Title	Channel	Sample
258	The storage optimizer successfully completed shrink on (C:)	Application	Y
262	The storage optimizer skipped slab consolidation on OS (C:) because: Slab size …	Application	Y
264	Event ID 264	Application	Y

Event ID 258: The storage optimizer successfully completed shrink on (C:)

Provider: Microsoft-Windows-Defrag
Channel: Application

Fields #

Name	Description
`Data_0`
`Data_1`
`Data`
`Binary`

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Defrag",
    "guid": "",
    "event_source_name": "",
    "event_id": 258,
    "version": 0,
    "level": 0,
    "task": 0,
    "opcode": 0,
    "keywords": 36028797018963968,
    "time_created": "2026-06-13T06:04:35.3053366+00:00",
    "event_record_id": 776,
    "correlation": {},
    "execution": {
      "process_id": 0,
      "thread_id": 0
    },
    "channel": "Application",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "Data_0": "retrim",
    "Data_1": "Windows 2022 (C:)"
  },
  "message": "The storage optimizer successfully completed retrim on Windows 2022 (C:)"
}

Event ID 262: The storage optimizer skipped slab consolidation on OS (C:) because: Slab size is too small.

Provider: Microsoft-Windows-Defrag
Channel: Application
Level: Informational

Fields #

Name	Description
`Data`
`Binary`

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Defrag",
    "guid": "",
    "event_source_name": "",
    "event_id": 262,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 36028797018963968,
    "time_created": "2026-01-28T03:03:30.594963+00:00",
    "event_record_id": 260,
    "correlation": {},
    "execution": {
      "process_id": 5876,
      "thread_id": 0
    },
    "channel": "Application",
    "computer": "JD-commando",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "Data": [
      "slab consolidation",
      "OS (C:)",
      "Slab size is too small. (0x8900002D)"
    ],
    "Binary": "LQAAiX8EAAARAgAAFAIAACI2uULZsb04GwcAAAAAAAAAAAAA"
  },
  "message": "The storage optimizer skipped slab consolidation on OS (C:) because: Slab size is too small. (0x8900002D)"
}

References #

Example event sourced from https://github.com/NextronSystems/evtx-baseline

Event ID 264

Provider: Microsoft-Windows-Defrag
Channel: Application
Level: Informational

Fields #

Name	Description
`Data_0`
`Data_1`
`Data_2`
`Binary`

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Defrag",
    "guid": "",
    "event_source_name": "",
    "event_id": 264,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 36028797018963968,
    "time_created": "2026-05-29T13:00:11.3544677+00:00",
    "event_record_id": 976,
    "correlation": {},
    "execution": {
      "process_id": 0,
      "thread_id": 0
    },
    "channel": "Application",
    "computer": "telemetry-DC-c.cell-c.ludus.domain",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "Data_0": "retrim",
    "Data_1": "Windows 2022 (C:)",
    "Data_2": "The user cancelled the operation. (0x89000006)"
  },
  "message": "The storage optimizer couldn't complete retrim on Windows 2022 (C:) because: The user cancelled the operation. (0x89000006)"
}

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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)

Microsoft-Windows-Defrag

Event ID 258: The storage optimizer successfully completed shrink on (C:)

Fields #

Example Event #

Event ID 262: The storage optimizer skipped slab consolidation on OS (C:) because: Slab size is too small.

Fields #

Example Event #

References #

Event ID 264

Fields #

Example Event #

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