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5154(S): The Windows Filtering Platform has permitted an application or service to listen on a port for incoming connections.

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Event 5154 illustration

Subcategory: Audit Filtering Platform Connection

Event Description:

This event generates every time Windows Filtering Platform permits an application or service to listen on a port.

Note  For recommendations, see Security Monitoring Recommendations for this event.


Event XML:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
 <Provider Name="Microsoft-Windows-Security-Auditing" Guid="{54849625-5478-4994-A5BA-3E3B0328C30D}" /> 
 <EventID>5154</EventID> 
 <Version>0</Version> 
 <Level>0</Level> 
 <Task>12810</Task> 
 <Opcode>0</Opcode> 
 <Keywords>0x8020000000000000</Keywords> 
 <TimeCreated SystemTime="2015-09-22T02:04:25.757462900Z" /> 
 <EventRecordID>287929</EventRecordID> 
 <Correlation /> 
 <Execution ProcessID="4" ThreadID="3968" /> 
 <Channel>Security</Channel> 
 <Computer>DC01.contoso.local</Computer> 
 <Security /> 
 </System>
- <EventData>
 <Data Name="ProcessId">4152</Data> 
 <Data Name="Application">\\device\\harddiskvolume2\\documents\\listener.exe</Data> 
 <Data Name="SourceAddress">0.0.0.0</Data> 
 <Data Name="SourcePort">4444</Data> 
 <Data Name="Protocol">6</Data> 
 <Data Name="FilterRTID">0</Data> 
 <Data Name="LayerName">%%14609</Data> 
 <Data Name="LayerRTID">40</Data> 
 </EventData>
 </Event>

Required Server Roles: None.

Minimum OS Version: Windows Server 2008, Windows Vista.

Event Versions: 0.

Field Descriptions:

Application Information:

  • Process ID [Type = Pointer]: hexadecimal Process ID of the process that was permitted to listen on the port. Process ID (PID) is a number used by the operating system to uniquely identify an active process. To see the PID for a specific process you can, for example, use Task Manager (Details tab, PID column):

    Task manager illustration

    If you convert the hexadecimal value to decimal, you can compare it to the values in Task Manager.

    You can also correlate this process ID with a process ID in other events, for example, “4688: A new process has been created” Process Information\New Process ID.

  • Application Name [Type = UnicodeString]: full path and the name of the executable for the process.

    Logical disk is displayed in format \device\harddiskvolume#. You can get all local volume numbers by using diskpart utility. The command to get volume numbers using diskpart is “list volume”:

DiskPart illustration

Network Information:

  • Source Address [Type = UnicodeString]: local IP address on which application requested to listen on the port.

    • IPv4 Address

    • IPv6 Address

    • :: - all IP addresses in IPv6 format s

    • 0.0.0.0 - all IP addresses in IPv4 format

    • 127.0.0.1, ::1 - localhost

  • Source Port [Type = UnicodeString]: source TCP\UDP port number that was requested for listening by application.

  • Protocol [Type = UInt32]: protocol number. For example:

Filter Information:

  • Filter Run-Time ID [Type = UInt64]: unique filter ID that allows application to listen on the specific port. By default Windows firewall won't prevent a port from being listened by an application and if this application doesn’t match any filters you'll get value 0 in this field.

    To find a specific Windows Filtering Platform filter by ID, run the following command: netsh wfp show filters. As a result of this command, the filters.xml file will be generated. Open this file and find specific substring with required filter ID (<filterId>), for example:

Filters.xml file illustration

  • Layer Name [Type = UnicodeString]: Application Layer Enforcement layer name.

  • Layer Run-Time ID [Type = UInt64]: Windows Filtering Platform layer identifier. To find a specific Windows Filtering Platform layer ID, run the following command: netsh wfp show state. As a result of this command, the wfpstate.xml file will be generated. Open this file and find specific substring with required layer ID (<layerId>), for example:

Wfpstate xml illustration

Security Monitoring Recommendations

For 5154(S): The Windows Filtering Platform has permitted an application or service to listen on a port for incoming connections.

  • If you've an “allowlist” of applications that are associated with certain operating systems or server roles, and that are expected to listen on specific ports, monitor this event for “Application Name” and other relevant information.

  • If a certain application is allowed to listen only on specific port numbers, monitor this event for “Application Name” and “Network Information\Source Port.”

  • If a certain application is allowed to listen only on a specific IP address, monitor this event for “Application Name” and “Network Information\Source Address.”

  • If a certain application is allowed to use only TCP or UDP protocols, monitor this event for “Application Name” and the protocol number in “Network Information\Protocol.”

  • If you have a predefined application that should be used to perform the operation that was reported by this event, monitor events with “Application” not equal to your defined application.

  • You can monitor to see if “Application” isn't in a standard folder (for example, not in System32 or Program Files) or is in a restricted folder (for example, Temporary Internet Files).

  • If you have a pre-defined list of restricted substrings or words in application names (for example, “mimikatz” or “cain.exe”), check for these substrings in “Application.”

  • Typically this event has an informational purpose.