Windows Event ID 5377 – Microsoft-Windows-Security-Auditing: Special Privileges Assigned to New Logon

Start by examining the event details to understand which privileges were assigned and to whom.

1. Open Event Viewer → Windows Logs → Security
2. Filter for Event ID 5377 using the filter option
3. Double-click the event to view detailed information
4. Note the following key fields:
   • Subject Security ID: The user receiving privileges
   • Privileges: List of special rights granted
   • Logon ID: Session identifier for correlation
5. Cross-reference the Logon ID with Event ID 4624 (successful logon) for complete context

Use PowerShell to efficiently query and analyze Event ID 5377 occurrences across your environment.

1. Open PowerShell as Administrator
2. Query recent Event ID 5377 entries:

   Get-WinEvent -FilterHashtable @{LogName='Security'; Id=5377} -MaxEvents 50 | Select-Object TimeCreated, Id, LevelDisplayName, Message

3. Filter by specific user or time range:

   $StartTime = (Get-Date).AddDays(-7)
   $Events = Get-WinEvent -FilterHashtable @{LogName='Security'; Id=5377; StartTime=$StartTime}
   $Events | Where-Object {$_.Message -like '*S-1-5-21*'} | Format-Table TimeCreated, Message -Wrap

4. Export results for analysis:

   Get-WinEvent -FilterHashtable @{LogName='Security'; Id=5377} -MaxEvents 100 | Export-Csv -Path "C:\Temp\Event5377_Analysis.csv" -NoTypeInformation

Correlate Event ID 5377 with related authentication events to build a complete security picture.

1. Identify the Logon ID from Event ID 5377
2. Search for corresponding logon events:

   $LogonID = "0x3e7"  # Replace with actual Logon ID from Event 5377
   $CorrelatedEvents = Get-WinEvent -FilterHashtable @{LogName='Security'; Id=4624,4625,4634} | Where-Object {$_.Message -like "*$LogonID*"}

3. Create a timeline of related events:

   $AllEvents = Get-WinEvent -FilterHashtable @{LogName='Security'; Id=4624,4634,5377} -MaxEvents 200
   $AllEvents | Sort-Object TimeCreated | Select-Object TimeCreated, Id, @{Name='EventType';Expression={switch($_.Id){4624{'Logon'};4634{'Logoff'};5377{'Privileges'}}}}

4. Review the sequence to identify normal vs. suspicious patterns
5. Document any unusual privilege assignments or timing anomalies

Examine patterns in privilege assignments to identify potential security concerns or policy violations.

1. Extract privilege information from events:

   $Events = Get-WinEvent -FilterHashtable @{LogName='Security'; Id=5377} -MaxEvents 500
   $PrivilegeData = $Events | ForEach-Object {
       $Message = $_.Message
       if ($Message -match 'Privileges:\s*(.+?)\n') {
           [PSCustomObject]@{
               Time = $_.TimeCreated
               Privileges = $matches[1].Trim()
               User = if ($Message -match 'Account Name:\s*(.+?)\n') { $matches[1].Trim() }
           }
       }
   }

2. Group by privilege type to identify most common assignments:

   $PrivilegeData | Group-Object Privileges | Sort-Object Count -Descending | Select-Object Name, Count

3. Check for unusual privilege combinations or high-risk privileges like SeDebugPrivilege
4. Review user accounts receiving multiple special privileges
5. Compare against established security baselines and policies

Implement comprehensive monitoring for Event ID 5377 to enhance security posture and compliance.

1. Verify audit policy configuration:

   auditpol /get /subcategory:"Special Logon"

2. Enable detailed privilege auditing if not already configured:

   auditpol /set /subcategory:"Special Logon" /success:enable /failure:enable

3. Configure Group Policy for consistent auditing across domain:
   • Navigate to Computer Configuration → Windows Settings → Security Settings → Advanced Audit Policy Configuration
   • Enable Audit Special Logon for Success and Failure
4. Set up automated monitoring with Windows Event Forwarding or SIEM integration
5. Create custom views in Event Viewer for quick access:

   <QueryList>
     <Query Id="0" Path="Security">
       <Select Path="Security">*[System[EventID=5377]]</Select>
     </Query>
   </QueryList>

6. Establish baseline patterns and alert thresholds for unusual activity