Microsoft-Windows-WER-Diag

5 events across 1 channel

Event	Title	Channel	Sample
1	Possible disk corruption detected for executable image CorruptedFilePath, …	Operational	N
2	Possible heap corruption detected (exception code Name).	Operational	Y
3	Possible crash in an unloaded dll detected.	Operational	N
4	Crash on launch is detected.	Operational	Y
5	CFG violation is detected.	Operational	Y

Event ID 1: Possible disk corruption detected for executable image CorruptedFilePath, causing application CrashedAppName to stop working with exception ExceptionCode, status code ExceptionStatusCode.

Provider: Microsoft-Windows-WER-Diag
Channel: Operational
Opcode: Info

Description

Possible disk corruption detected for executable image CorruptedFilePath, causing application CrashedAppName to stop working with exception ExceptionCode, status code ExceptionStatusCode. Initiating further diagnostics.

Message #

Possible disk corruption detected for executable image %1, causing application %2 to stop working with exception %3, status code %4. Initiating further diagnostics.

Fields #

Name	Description
`CorruptedFilePath` UnicodeString
`CrashedAppName` UnicodeString
`ExceptionCode` UInt32
`ExceptionStatusCode` UInt32

Event ID 2: Possible heap corruption detected (exception code Name).

Provider: Microsoft-Windows-WER-Diag
Channel: Operational
Level: Informational
Opcode: Info

Description

Possible heap corruption detected (exception code Name). Initiating further diagnostics.

Message #

Possible heap corruption detected (exception code %1). Initiating further diagnostics.

Fields #

Name	Description
`ExceptionCode` UInt32

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WER-Diag",
    "guid": "AD8AA069-A01B-40A0-BA40-948D1D8DEDC5",
    "event_source_name": "",
    "event_id": 2,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9224497936761618432,
    "time_created": "2026-03-09T01:01:32.206209+00:00",
    "event_record_id": 1,
    "correlation": {},
    "execution": {
      "process_id": 7856,
      "thread_id": 2516
    },
    "channel": "Microsoft-Windows-WER-Diag/Operational",
    "computer": "LAB-WIN11",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Name": "FTH_EXCEPTION_OF_INTEREST",
    "ExceptionCode": 3221225477
  },
  "message": ""
}

Event ID 3: Possible crash in an unloaded dll detected.

Provider: Microsoft-Windows-WER-Diag
Channel: Operational
Opcode: Info

Description

Possible crash in an unloaded dll detected. Initiating further diagnostics.

Message #

Possible crash in an unloaded dll detected. Initiating further diagnostics.

Fields #

Name	Description
`ProcessId` UInt32
`ModuleNameLength` UInt32
`ModuleName` UnicodeString

Event ID 4: Crash on launch is detected.

Provider: Microsoft-Windows-WER-Diag
Channel: Operational
Level: Informational
Opcode: Info

Description

Crash on launch is detected. Initiating further diagnostics.

Message #

Crash on launch is detected. Initiating further diagnostics.

Fields #

Name	Description
`ProcessId` UInt32
`ModuleName` UnicodeString
`StartTime` UInt64
`CrashTimeFromStart` UInt64

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WER-Diag",
    "guid": "AD8AA069-A01B-40A0-BA40-948D1D8DEDC5",
    "event_source_name": "",
    "event_id": 4,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9224497936761618432,
    "time_created": "2026-03-13T22:05:01.557312+00:00",
    "event_record_id": 2,
    "correlation": {},
    "execution": {
      "process_id": 7740,
      "thread_id": 1108
    },
    "channel": "Microsoft-Windows-WER-Diag/Operational",
    "computer": "LAB-WIN11.ludus.domain",
    "security": {
      "user_id": "S-1-5-21-1006758700-2167138679-1475694448-1105"
    }
  },
  "event_data": {
    "Name": "CRASH_ON_LAUNCH",
    "ProcessId": 8748,
    "ModuleName": "C:\\Windows\\System32\\Magnify.exe",
    "StartTime": 134179130996217430,
    "CrashTimeFromStart": 19353291
  },
  "message": ""
}

Event ID 5: CFG violation is detected.

Provider: Microsoft-Windows-WER-Diag
Channel: Operational
Level: Informational
Collection Priority: Recommended (JSCU-NL)
Opcode: Info

Description

CFG violation is detected.

Message #

CFG violation is detected.

Fields #

Name	Description
`AppPath` UnicodeString
`ProcessId` UInt32
`ProcessStartTime` FILETIME
`Is64Bit` Boolean
`CallReturnAddress` Pointer
`CallReturnModName` UnicodeString
`CallReturnModOffset` UInt32
`CallReturnInstructionBytesLength` UInt32
`CallReturnInstructionBytes` Binary
`CallReturnBaseAddress` Pointer
`CallReturnRegionSize` Pointer
`CallReturnState` UInt32
`CallReturnProtect` UInt32
`CallReturnType` UInt32
`TargetAddress` Pointer
`TargetModName` UnicodeString
`TargetModOffset` UInt32
`TargetInstructionBytesLength` UInt32
`TargetInstructionBytes` Binary
`TargetBaseAddress` Pointer
`TargetRegionSize` Pointer
`TargetState` UInt32
`TargetProtect` UInt32
`TargetType` UInt32

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WER-Diag",
    "event_id": 5,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "time_created": "2026-05-27T16:20:07.7628068+00:00",
    "computer": "DESKTOP-FF3N5XK.ludus.domain",
    "channel": "Microsoft-Windows-WER-Diag"
  },
  "event_data": {
    "ProcessStartTime": "2026-04-28T02:27:40.0821642Z",
    "TargetProtect": "0",
    "CallReturnType": "0",
    "TargetInstructionBytesLength": "0",
    "AppPath": "C:\\WINDOWS\\system32\\svchost.exe",
    "TargetAddress": "0x0",
    "Is64Bit": "true",
    "TargetBaseAddress": "0x0",
    "CallReturnRegionSize": "0x0",
    "CallReturnInstructionBytesLength": "0",
    "TargetRegionSize": "0x0",
    "CallReturnBaseAddress": "0x0",
    "TargetModOffset": "0",
    "CallReturnProtect": "0",
    "ProcessId": "5744",
    "TargetType": "0",
    "CallReturnModOffset": "0",
    "TargetState": "0",
    "CallReturnState": "0",
    "CallReturnAddress": "0x0"
  }
}

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 ad8aa069-a01b-40a0-ba40-948d1d8dedc5

Defined in werfault.exe, which carries the event manifest.

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.2849, captured 2026-06-02
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.5074, 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-WER-Diag

Event ID 1: Possible disk corruption detected for executable image CorruptedFilePath, causing application CrashedAppName to stop working with exception ExceptionCode, status code ExceptionStatusCode.

Description

Message #

Fields #

Event ID 2: Possible heap corruption detected (exception code Name).

Description

Message #

Fields #

Example Event #

Event ID 3: Possible crash in an unloaded dll detected.

Description

Message #

Fields #

Event ID 4: Crash on launch is detected.

Description

Message #

Fields #

Example Event #

Event ID 5: CFG violation is detected.

Description

Message #

Fields #

Example Event #

Provenance

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