detection.wiki

Microsoft-Windows-Security-Auditing › Event 4740

Event ID 4740 — A user account was locked out.

Provider
Microsoft-Windows-Security-Auditing
Channel
Security
Audit Policy
Account Management → User Account Management
Collection Priority
Recommended (Palantir, others)
Opcode
Info

Description

A user account was locked out.

Message #

A user account was locked out.

Subject:
	Security ID: %4
	Account Name: %5
	Account Domain: %6
	Logon ID: %7

Account That Was Locked Out:
	Security ID: %3
	Account Name: %1

Additional Information:
	Caller Computer Name: %2

Fields #

NameDescription
TargetUserName UnicodeString[Account That Was Locked Out] Account Name
TargetDomainName UnicodeString[Additional Information] Caller Computer Name
TargetSid SID[Account That Was Locked Out] Security ID
SubjectUserSid SID[Subject] Security ID
SubjectUserName UnicodeString[Subject] Account Name
SubjectDomainName UnicodeString[Subject] Account Domain
SubjectLogonId HexInt64[Subject] Logon ID
Account_Name UnicodeString[Account That Was Locked Out] Account Name.
Caller_Computer_Name UnicodeString[Additional Information] Caller Computer Name.
Security_ID SID[Account That Was Locked Out] Security ID.
Account_Domain UnicodeString[Subject] Account Domain.
Logon_ID HexInt64[Subject] Logon ID.

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Security-Auditing",
    "guid": "54849625-5478-4994-A5BA-3E3B0328C30D",
    "event_source_name": "",
    "event_id": 4740,
    "version": 0,
    "level": 0,
    "task": 13824,
    "opcode": 0,
    "keywords": 9232379236109516800,
    "time_created": "2026-03-13T23:03:33.513406+00:00",
    "event_record_id": 16594636,
    "correlation": {},
    "execution": {
      "process_id": 936,
      "thread_id": 10928
    },
    "channel": "Security",
    "computer": "LAB-DC01.ludus.domain",
    "security": {
      "user_id": ""
    }
  },
  "event_data": {
    "TargetUserName": "KrbTestLockout",
    "TargetDomainName": "LAB-DC01",
    "TargetSid": "S-1-5-21-1006758700-2167138679-1475694448-1268",
    "SubjectUserSid": "S-1-5-18",
    "SubjectUserName": "LAB-DC01$",
    "SubjectDomainName": "ludus",
    "SubjectLogonId": "0x3e7"
  },
  "message": ""
}

Community Notes #

Pair with 4625 and related IPs during investigation. Review Caller_Computer_Name.

References #