EventID 2004: Firewall Rule Added
This event indicates that a new firewall rule has been added to the Windows Firewall.
In recent builds of Windows 11, this event has been replaced by a new Event ID:
Analysis Value
Security IdentifierFile PathExecution AccountParent and Child InformationEvidence of ExecutionFirewall ActivityOperating System Availability
Windows 11
⚠️
Server 2019
✅
Windows 10
✅
Server 2016
✅
Windows 8
✅
Server 2012
✅
Windows 7
✅
Server 2008
✅
Windows Vista
✅
Server 2003
❌
Windows XP
❌
Artifact Location(s)
%SystemRoot%\System32\Winevt\Logs\Microsoft-Windows-Windows Firewall With Advanced Security%4Firewall.evtx
Artifact Interpretation
System/Security/UserID
Provides the Security Identifier (SID) of the account that added the new firewall rule.
EventData/ModifyingUser
Provides the Security Identifier (SID) of the account that added the new firewall rule.
EventData/ModifyingApplication
Provides the full image path of the process that added the new firewall rule.
System/Execution/ProcessID
Provides the Process ID of the application that created the new firewall rule.
System/Execution/ThreadID
Provides the Thread ID of the application that created the new firewall rule.
The presence of this event indicates that the system's firewall was modified by adding a new rule. This may be indicative of attacker activity. There are many legitimate processes such as svchost.exe
that will be observed modifying the Windows Firewall, so this event should be correlated with others to determine if the activity is legitimate or not.
The following additional fields are available in this event:
EventData/RuleId
A GUID for the new firewall rule
EventData/RuleName
The name for the firewall rule as it appears in the Windows Firewall
EventData/Direction
1 for inbound rules and 2 for outbound rules
EventData/Profiles
What profiles (Private/Domain/Public) this rule applies to.
EventData/Active
0 for disabled rules and 1 for enabled rules
EventData/Action
3 for allow and 2 for block
EventData/SecurityOptions
0 for none and 1 for require authentication
EventData/ApplicationPath
If the rule applies only to a specific application it will be listed here
EventData/ServiceName
If the rule applies only to a specific service it will be listed here
Example - Windows 10
On an example system, a new Windows Firewall rule was added from the command line, causing the following event to be logged:
-
<Event
xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Microsoft-Windows-Windows Firewall With Advanced Security" Guid="{d1bc9aff-2abf-4d71-9146-ecb2a986eb85}" />
<EventID>2004</EventID>
<Version>0</Version>
<Level>4</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000020000000000</Keywords>
<TimeCreated SystemTime="2023-05-04T17:01:45.8409961Z" />
<EventRecordID>6661</EventRecordID>
<Correlation />
<Execution ProcessID="2352" ThreadID="19044" />
<Channel>Microsoft-Windows-Windows Firewall With Advanced Security/Firewall</Channel>
<Computer>HLPC01</Computer>
<Security UserID="S-1-5-19" />
</System>
- <EventData>
<Data Name="RuleId">{8736B31E-8792-452E-8D2D-C45621F236AF}</Data>
<Data Name="RuleName">Open SSH Port 22</Data>
<Data Name="Origin">1</Data>
<Data Name="ApplicationPath" />
<Data Name="ServiceName" />
<Data Name="Direction">1</Data>
<Data Name="Protocol">6</Data>
<Data Name="LocalPorts">22</Data>
<Data Name="RemotePorts">*</Data>
<Data Name="Action">3</Data>
<Data Name="Profiles">2147483647</Data>
<Data Name="LocalAddresses">*</Data>
<Data Name="RemoteAddresses">*</Data>
<Data Name="RemoteMachineAuthorizationList" />
<Data Name="RemoteUserAuthorizationList" />
<Data Name="EmbeddedContext" />
<Data Name="Flags">1</Data>
<Data Name="Active">1</Data>
<Data Name="EdgeTraversal">0</Data>
<Data Name="LooseSourceMapped">0</Data>
<Data Name="SecurityOptions">0</Data>
<Data Name="ModifyingUser">S-1-5-21-3471133136-2963561160-3931775028-1001</Data>
<Data Name="ModifyingApplication">C:\Windows\System32\netsh.exe</Data>
<Data Name="SchemaVersion">542</Data>
<Data Name="RuleStatus">65536</Data>
<Data Name="LocalOnlyMapped">0</Data>
</EventData>
</Event>
This example was produced on Windows 10, Version 10.0.19044 Build 19044
The following command was executed to create the new firewall rule:
netsh advfirewall firewall add rule name="Open SSH Port 22" dir=in action=allow protocol=TCP localport=22 remoteip=any
Example - Windows 11
The same command, when executed on a Windows 11 system, results in the following event being logged:
-
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Microsoft-Windows-Windows Firewall With Advanced Security" Guid="{d1bc9aff-2abf-4d71-9146-ecb2a986eb85}" />
<EventID>2071</EventID>
<Version>0</Version>
<Level>4</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000020000000000</Keywords>
<TimeCreated SystemTime="2023-09-27T01:09:12.7137288Z" />
<EventRecordID>545</EventRecordID>
<Correlation />
<Execution ProcessID="2704" ThreadID="3624" />
<Channel>Microsoft-Windows-Windows Firewall With Advanced Security/Firewall</Channel>
<Computer>W11</Computer>
<Security UserID="S-1-5-19" />
</System>
- <EventData>
<Data Name="RuleId">{0D458E97-4EC5-4C5C-A5A4-F9F73E769168}</Data>
<Data Name="RuleName">Open SSH Port 22</Data>
<Data Name="Origin">1</Data>
<Data Name="ApplicationPath" />
<Data Name="ServiceName" />
<Data Name="Direction">1</Data>
<Data Name="Protocol">6</Data>
<Data Name="LocalPorts">22</Data>
<Data Name="RemotePorts">*</Data>
<Data Name="Action">3</Data>
<Data Name="Profiles">2147483647</Data>
<Data Name="LocalAddresses">*</Data>
<Data Name="RemoteAddresses">*</Data>
<Data Name="RemoteMachineAuthorizationList" />
<Data Name="RemoteUserAuthorizationList" />
<Data Name="EmbeddedContext" />
<Data Name="Flags">1</Data>
<Data Name="Active">1</Data>
<Data Name="EdgeTraversal">0</Data>
<Data Name="LooseSourceMapped">0</Data>
<Data Name="SecurityOptions">0</Data>
<Data Name="ModifyingUser">S-1-5-21-937911350-1118943250-2293061635-1001</Data>
<Data Name="ModifyingApplication">C:\Windows\System32\netsh.exe</Data>
<Data Name="SchemaVersion">544</Data>
<Data Name="RuleStatus">65536</Data>
<Data Name="LocalOnlyMapped">0</Data>
<Data Name="ErrorCode">0</Data>
</EventData>
</Event>
This example was produced on Windows 11, Version 10.0.22621 Build 22621
Last updated