You have a stand-alone computer named Computer1 that runs Windows 7. Several users share
Computer1.
You need to prevent all users who are members of a group named Group1 from running Windows
Media Player. All other users must be allowed to run Windows Media Player.
You must achieve this goal by using the least amount of administrative effort.
What should you do?
A.
From Software Restriction Policies, create a path rule.
B.
From Software Restriction Policies, create a hash rule.
C.
From Application Control Policies, create the default rules.
D.
From Application Control Policies, create an executable rule.
Explanation:
Executable Rules
Executable rules apply to files that have .exe and .com file extensions. AppLocker policies are
primarily about executable files, and it is likely that the majority of the AppLocker policies that you
work with in your organizational environment will involve executable rules. The default executable
rules are path rules that allow everyone to execute all applications in the Program Files folder and
the Windows folder. The default rules also allow members of the administrators group to execute
applications in any location on the computer. It is necessary to use the default executable rules, or
rules that mirror their functionality, because Windows does not function properly unless certain
applications, covered by these default rules, are allowed to execute. When you create a rule, the
scope of the rule is set to Everyone, even though there is not a local group named Everyone. If you
choose to modify the rule, you can select a specific security group or user account.
NOT Default rules
Default rules are a set of rules that can be created automatically and which allow access to default
Windows and program files. Default rules are necessary because AppLocker has a built-in fallback
block rule that restricts the execution of any application that is not subject to an Allow rule. This
means that when you enable AppLocker, you cannot execute any application, script, or installer that
does not fall under an Allow rule. There are different default rules for each rule type. The default
rules for each rule type are general and can be tailored by administrators specifically for theirenvironments. For example, the default executable rules are path rules. Security-minded
administrators might replace the default rules with publisher or hash rules because these are more
secure.
NOT Path Rules
Path rules, allow you to specify a file, folder, or registry key as the target of a Software Restriction
Policy. The more specific a path rule is, the higher its precedence. For example, if you have a path
rule that sets the file C: \Program files\Application\App.exe to Unrestricted and one that sets the
folder C:\Program files\Application to Disallowed, the more specific rule takes precedence and the
application can execute. Wildcards can be used in path rules, so it is possible to have a path rule that
specifies C:\Program files\Application\*.exe. Wildcard rules are less specific than rules that use a
file’s full path. The drawback of path rules is that they rely on files and folders remaining in place.
For example, if you created a path rule to block the application C:\Apps\Filesharing.exe, an attacker
could execute the same application by moving it to another directory or renaming it something
other than Filesharing.exe. Path rules work only when the file and folder permissions of the
underlying operating system do not allow files to be moved and renamed.
NOT Hash Rules
Hash rules, work through the generation of a digital fingerprint that identifies a file based on its
binary characteristics. This means that a file that you create a hash rule for will be identifiable
regardless of the name assigned to it or the location from which you access it. Hash rules work on
any file and do not require the file to have a digital signature. The drawback of hash rules is that you
need to create them on a per-file basis. You cannot create hash rules automatically for Software
Restriction Policies; you must generate each rule manually. You must also modify hash rules each
time that you apply a software update to an application that is the subject of a hash rule. Software
updates modify the binary properties of the file, which means that the modified file does not match
the original digital fingerprint.