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New-AppLockerPolicy

  • Reference
Module:
AppLocker

Creates a new AppLocker policy from a list of file information and other rule creation options.

Syntax

New-AppLockerPolicy
   [-FileInformation] <System.Collections.Generic.List`1[Microsoft.Security.ApplicationId.PolicyManagement.PolicyModel.FileInformation]>
   [-AllowWindows]
   [-RuleType <System.Collections.Generic.List`1[Microsoft.Security.ApplicationId.PolicyManagement.RuleType]>]
   [-RuleNamePrefix <String>]
   [-User <String>]
   [-Optimize]
   [-IgnoreMissingFileInformation]
   [-Xml]
   [-ServiceEnforcement <ServiceEnforcementMode>]
   [<CommonParameters>]
New-AppLockerPolicy
   [-AllowWindows]
   [-RuleType <System.Collections.Generic.List`1[Microsoft.Security.ApplicationId.PolicyManagement.RuleType]>]
   [-RuleNamePrefix <String>]
   [-User <String>]
   [-Optimize]
   [-IgnoreMissingFileInformation]
   [-Xml]
   [-ServiceEnforcement <ServiceEnforcementMode>]
   [<CommonParameters>]

Description

The New-AppLockerPolicy cmdlet uses a list of file information to automatically generate a list of rules for a given user or group. Rules can be generated based on publisher, hash, or path information.

Run the Get-AppLockerFileInformation cmdlet to create the list of file information.

By default, the output is an AppLockerPolicy object. If the Xml parameter is specified, the output will be the AppLocker policy as an XML-formatted string.

Examples

Example 1: Create an AppLocker policy with allow rules

C:\PS>Get-ChildItem C:\Windows\System32\*.exe | Get-AppLockerFileInformation | New-AppLockerPolicy -RuleType Publisher, Hash -User Everyone -RuleNamePrefix System32

                                Version RuleCollections                         RuleCollectionTypes 
                                ------- ---------------                         ------------------- 
                                      1 {Microsoft.Security.ApplicationId.Po... {Exe}

This example creates an AppLocker policy that contains allow rules for all of the executable files in C:\Windows\System32. The policy contains publisher rules for those files with publisher information and hash rules for those that do not. The rules are prefixed with System32: and the rules apply to the Everyone group.

Example 2: Create an AppLocker policy

C:\PS>Get-ChildItem C:\Windows\System32\*.exe | Get-AppLockerFileInformation | New-AppLockerPolicy -AllowWindows -RuleType Path -User Everyone -Optimize -XML
<AppLockerPolicy Version="1"><RuleCollection Type="Exe" EnforcementMode="NotConfigured"><FilePathRule Id="31B2F340-016D 
-11D2-945F-00C04FB984F9" Name="%SYSTEM32%\*" Description="" 10 UserOrGroupSid="S-1-5-21-3165297888-301567370-576410423- 
13" Action="cAllow"><Conditions><FilePathCondition Path="%SYSTEM32%\*" /></Conditions></FilePathRule></RuleCollection> 
</AppLockerPolicy>

This example creates an XML-formatted AppLocker policy for all of the executable files in C:\Windows\System32. The policy contains only path rules. The rules are applied to the Everyone group. The Optimize parameter indicates that similar rules are grouped together where possible. The AppLocker policy trusts all local Windows components.

Example 3: Create an AppLocker policy from audited events

C:\PS>Get-AppLockerFileInformation -EventLog -LogPath "Microsoft-Windows-AppLocker/EXE and DLL" -EventType Audited | New-AppLockerPolicy -RuleType Publisher,Hash -User domain\FinanceGroup -IgnoreMissingFileInformation | Set-AppLockerPolicy -LDAP "LDAP://DC13.TailspinToys.com/CN={31B2F340-016D-11D2-945F-00C04FB984F9},CN=Policies,CN=System,DC=WingTipToys,DC=com"

This example creates a new AppLocker policy from the audited events in the local Microsoft-Windows-AppLocker/EXE and DLL event log. All of the rules will be applied to the domain\FinanceGroup group. Publisher rules are created when the publisher information is available, and hash rules are created if the publisher information is not available. If only path information is available for a file, then the file is skipped because the IgnoreMissingFileInformation parameter is specified, and the file is included in the warning log. If the IgnoreMissingFileInformation parameter is not specified when file information is missing, then the cmdlet exits because it cannot create the specified rule type. After the new AppLocker policy is created, the AppLocker policy of the specified Group Policy Object (GPO) is set. The existing AppLocker policy in the specified GPO will be overwritten.

Parameters

-AllowWindows

Indicates that the AppLocker policy allows all local Windows components.

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-FileInformation

Specifies a file that can contain publisher, path, and hash information. Some information may be missing, such as publisher information for an unsigned file.

Type:List<T>[Microsoft.Security.ApplicationId.PolicyManagement.PolicyModel.FileInformation]
Position:0
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-IgnoreMissingFileInformation

Specifies that, if a rule cannot be created for a file because of missing file information, then evaluation of the remaining file information will continue and a warning log of the files skipped will be generated.

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-Optimize

Specifies that similar rules will be grouped together.

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-RuleNamePrefix

Specifies a name to add as the prefix for each rule that is created.

Type:String
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-RuleType

Specifies the type of rules to create from the file information. Publisher, path, or hash rules can be created from the file information. Multiple rule types may be specified. Therefore, that there are backup rule types if the necessary file information is not available.

For example, if Publisher, Hash is specified for this parameter, then the hash rules are applied when publisher information is not available.

Type:List<T>[Microsoft.Security.ApplicationId.PolicyManagement.RuleType]
Accepted values:Publisher, Path, Hash
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-ServiceEnforcement

Specifies whether the AppLocker policy for EXE and DLL rule collections applies to non-interactive processes. The acceptable values for this parameter are:

  • NotConfigured
  • Enabled
  • ServicesOnly
Type:ServiceEnforcementMode
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-User

Specifies the user or group to which the rules are applied. The acceptable values for this parameter are:

  • DNS user name (domain\username)
  • User Principal Name (username@domain.com)
  • SAM user name (username)
  • Security identifier (S-1-5-21-3165297888-301567370-576410423-1103)
Type:String
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-Xml

Specifies that the output of the AppLocker policy be as an XML-formatted string.

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

Inputs

Microsoft.Security.ApplicationId.PolicyManagement.PolicyModel.FileInformation

Outputs

Microsoft.Security.ApplicationId.PolicyManagement.PolicyModel.AppLockerPolicy

String