Event ID 4743 — A computer account was deleted.
Description
A computer account was deleted.
Message #
Fields #
| Name | Description |
|---|---|
Account_Name | [Target Computer] Account Name. |
Account_Domain | [Target Computer] Account Domain. |
Security_ID | [Target Computer] Security ID. |
Security_ID | [Subject] Security ID. |
Account_Name | [Subject] Account Name. |
Account_Domain | [Subject] Account Domain. |
Logon_ID | [Subject] Logon ID. |
Privileges | [Additional Information] Privileges. Privilege constants reference |
Example Event #
{
"system": {
"provider": "Microsoft-Windows-Security-Auditing",
"guid": "54849625-5478-4994-A5BA-3E3B0328C30D",
"event_source_name": "",
"event_id": 4743,
"version": 0,
"level": 0,
"task": 13825,
"opcode": 0,
"keywords": 9232379236109516800,
"time_created": "2020-07-12T19:36:44.227880Z",
"event_record_id": 16334944,
"correlation": {},
"execution": {
"process_id": 528,
"thread_id": 3156
},
"channel": "Security",
"computer": "rootdc1.offsec.lan",
"security": {
"user_id": ""
}
},
"event_data": {
"TargetUserName": "YOURPC$",
"TargetDomainName": "OFFSEC",
"TargetSid": "S-1-5-21-4230534742-2542757381-3142984815-1167",
"SubjectUserSid": "S-1-5-21-4230534742-2542757381-3142984815-1158",
"SubjectUserName": "lambda-user",
"SubjectDomainName": "OFFSEC",
"SubjectLogonId": "0x87e482b",
"PrivilegeList": "-"
}
}
Detection Patterns #
User Account
Security-Auditing Event ID 4720: A user account was created.ANDEvent ID 4722: A user account was enabled.ANDEvent ID 4723: An attempt was made to change an account's password.ANDEvent ID 4724: An attempt was made to reset an account's password.ANDEvent ID 4725: A user account was disabled.ANDEvent ID 4726: A user account was deleted.ANDEvent ID 4728: A member was added to a security-enabled global group.ANDEvent ID 4732: A member was added to a security-enabled local group.ANDEvent ID 4733: A member was removed from a security-enabled local group.ANDEvent ID 4738: A user account was changed.ANDEvent ID 4743: A computer account was deleted.ANDEvent ID 4780: The ACL was set on accounts which are members of administrators groups.
6 rules
Defense Evasion: Rogue Domain Controller
Security-Auditing Event ID 4741: A computer account was created.OREvent ID 4743: A computer account was deleted.
1 rule
References #
- Microsoft Learn https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4743
- Microsoft Learn Audit Policy https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/audit-computer-account-management
- Ultimate Windows Security https://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventid=4743
- Example event sourced from https://github.com/Yamato-Security/hayabusa-sample-evtx