4907 Security log · Policy Change medium severity low volume

Windows Event ID 4907 — Auditing settings on object were changed

The auditing (SACL) settings on an object were modified.

Why event 4907 matters

Removing SACLs from monitored objects blinds object-access auditing. Attackers may remove SACL from LSASS or SAM before accessing them.

How to detect it

Alert: SACL removed from sensitive objects (LSASS, SAM, NTDS.dit). Alert: changes outside business hours.

Log source
Security
Advanced Audit Policy — enable the 'Policy Change' subcategory (Success and/or Failure).
Fields to pivot on
SubjectUserNameTargetUserNameLogonTypeIpAddressWorkstationName

MITRE ATT&CK mapping

Tactic Technique
Defense Evasion Impair Defenses (T1562)

Detection queries

Starting points — adapt the log source, projected fields and thresholds for your environment.

Sentinel / Defender KQL
SecurityEvent
| where EventID == 4907   // Auditing settings on object were changed
| project TimeGenerated, Computer, SubjectUserName, TargetUserName, LogonType, IpAddress, WorkstationName
| sort by TimeGenerated desc
Splunk SPL
index=* sourcetype="WinEventLog:Security" EventCode=4907
| stats count earliest(_time) as first_seen latest(_time) as last_seen by ComputerName
| sort - count   `# Auditing settings on object were changed — add EventData fields: SubjectUserName, TargetUserName, LogonType, IpAddress`
Hunt event 4907 in Sentinel/Defender →
Build a KQL query for this event in the KQL Query Builder.
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Open the interactive Windows Event ID lookup.

Related Policy Change events

4698 A scheduled task was created 4699 A scheduled task was deleted 4700 A scheduled task was enabled 4701 A scheduled task was disabled 4702 A scheduled task was updated 4703 A token right was adjusted 4704 A user right was assigned 4705 A user right was removed 4706 A new trust was created to a domain 4707 A trust to a domain was removed 4713 Kerberos policy was changed 4714 Encrypted data recovery policy was changed

Frequently asked questions

What is Windows Event ID 4907?

Auditing settings on object were changed. The auditing (SACL) settings on an object were modified.

Which log records event 4907?

Event 4907 is written to the Security channel by Microsoft-Windows-Security-Auditing. Advanced Audit Policy — enable the 'Policy Change' subcategory (Success and/or Failure).

What MITRE ATT&CK techniques map to event 4907?

Event 4907 is associated with: Impair Defenses (T1562).

How do you detect activity around event 4907?

Alert: SACL removed from sensitive objects (LSASS, SAM, NTDS.dit). Alert: changes outside business hours.