New-AppLockerPolicy
New-AppLockerPolicy
Creates a new AppLocker policy from a list of file information and other rule creation options.
Syntax
Parameter Set: Default
New-AppLockerPolicy [-FileInformation] <List<FileInformation>> [-IgnoreMissingFileInformation] [-Optimize] [-RuleNamePrefix <String> ] [-RuleType <List<RuleType>> ] [-User <String> ] [-Xml] [ <CommonParameters>]
Detailed 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.
Parameters
-FileInformation<List<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.
Aliases |
none |
Required? |
true |
Position? |
1 |
Default Value |
none |
Accept Pipeline Input? |
true (ByValue, ByPropertyName) |
Accept Wildcard Characters? |
false |
-IgnoreMissingFileInformation
Specifies that, if a rule cannot be created for a file due to missing file information, then evaluation of the remaining file information will continue and a warning log of the files skipped will be generated.
Aliases |
none |
Required? |
false |
Position? |
named |
Default Value |
none |
Accept Pipeline Input? |
false |
Accept Wildcard Characters? |
false |
-Optimize
Specifies that similar rules will be grouped together.
Aliases |
none |
Required? |
false |
Position? |
named |
Default Value |
none |
Accept Pipeline Input? |
false |
Accept Wildcard Characters? |
false |
-RuleNamePrefix<String>
Specifies a name to add as the prefix for each rule that is created.
Aliases |
none |
Required? |
false |
Position? |
named |
Default Value |
none |
Accept Pipeline Input? |
false |
Accept Wildcard Characters? |
false |
-RuleType<List<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, so 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.
Aliases |
none |
Required? |
false |
Position? |
named |
Default Value |
Publisher, Hash |
Accept Pipeline Input? |
false |
Accept Wildcard Characters? |
false |
-User<String>
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)
Aliases |
none |
Required? |
false |
Position? |
named |
Default Value |
Everyone |
Accept Pipeline Input? |
false |
Accept Wildcard Characters? |
false |
-Xml
Specifies that the output of the AppLocker policy be as an XML-formatted string.
Aliases |
none |
Required? |
false |
Position? |
named |
Default Value |
none |
Accept Pipeline Input? |
false |
Accept Wildcard Characters? |
false |
<CommonParameters>
This cmdlet supports the common parameters: -Verbose, -Debug, -ErrorAction, -ErrorVariable, -OutBuffer, and -OutVariable. For more information, see about_CommonParameters (https://go.microsoft.com/fwlink/p/?LinkID=113216).
Inputs
The input type is the type of the objects that you can pipe to the cmdlet.
- Microsoft.Security.ApplicationId.PolicyManagement.PolicyModel.FileInformation
Outputs
The output type is the type of the objects that the cmdlet emits.
Microsoft.Security.ApplicationId.PolicyManagement.PolicyModel.AppLockerPolicy
AppLockerPolicy
System.String
Examples
EXAMPLE 1
This example creates an AppLocker policy containing 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.
C:\PS>Get-ChildItem C:\Windows\System32\*.exe | Get-AppLockerFileInformation | New-AppLockerPolicy -RuleType Publisher, Hash -User Everyone -RuleNamePrefix System32
EXAMPLE 2
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, and the Optimize parameter indicates that similar rules are grouped together where possible.
C:\PS>Get-ChildItem C:\Windows\System32\*.exe | Get-AppLockerFileInformation | New-AppLockerPolicy -RuleType Path -User Everyone -Optimize -XML
EXAMPLE 3
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.
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"