Enable or disable the option to Allow user to use printers. Select the option for the setting Allow write access to USB flash drives. In addition to the Disabled option and the option to allow write access to All USB flash drives , this setting provides a third option, Only IronKey Secure Flash Drives , which allows a user to write only to specialized, highly secured flash drives created by IronKey, Inc.
Enable or disable the option to Allow user to burn CDs. Enable or disable the option to Allow user to choose storage location. This specifies whether a user can choose the storage location for Protected Workspace files.
Enabled allows users to select a storage location. Disabled stores files in the Document and Settings directory. Select whether to Enable persistent storage. This specifies whether data is saved on the system after the protected workspace session is closed. Enabled allows users to save encrypted data from the protected workspace session on the local system after the session exits.
The files are automatically decrypted and available in the next protected workspace session. Disabled prevents users from storing protected workspace data in persistent storage.
Select whether to Password protect new storage. Specifies whether protected workspace requires a password to access data in persistent storage. Enabled requires the user to set a password to access persistent storage data. Disabled uses the default encryption and decryption, which is based on the server group name and storage device volume serial number.
Specify a Server group name. This specifies a group name for the server. This name is arbitrary, but limits the persistent storage to that group name. For example, if a user connects to Protected Workspace on a server with group name GroupA , and persistent storage is enabled, the user data is available when reconnecting to a protected workspace session with the group name GroupA.
However, if the user then connects to a server with persistent storage enabled and the server group name GroupB , persistent data from the GroupA protected workspace session is not available in the new session, and a new persistent storage is defined. If you want to allow protected workspace users to have write access to a specific server, click the Add new entry button and type the name of the server under Allow write access to these servers. To add more servers, repeat this step. To remove a server, click the X button next to the name of the server.
In this example, the administrator adds protected workspace to an access policy branch. The security policy is very strict, so the only option allowed is for a user to write to an IronKey USB flash drive, and a server called Quarantine. Persistent storage is not enabled. From the Allow user to temporarily switch from Protected Workspace list, select Disabled.
From the Allow user to use printers list, select Disabled. From the Allow user to burn CDs list, select Disabled. From the Allow user to choose storage location list, select Disabled. From the Enable persistent storage list, select Disabled. From the Password protect new storages list, select Enabled. Leave the Server group name list blank. Click Add new entry to add a server to which a user can write. In the box that appears, type Quarantine. Note that new entries are added above previously configured entries, by default.
Click Save to save the access policy. The Windows group policy action allows you to assign a Windows group policy, which changes security settings for the Windows client environment for the duration of the network access session. To use Windows group policy functionality, you must purchase a separate license for the feature. Windows group policy templates allow you to configure and assign group policies for Windows machines dynamically per user session in the access policy.
Using Windows group policy templates, you can make configuration changes to client systems that exist for the duration of a session. The system applies Windows group policy changes after the Windows group policy check is successful, and before resources are assigned. After the user terminates the session, all Windows group policy changes are rolled back, and the client system reverts to its previous state.
You can use predefined Windows group policy templates with Access Policy Manager. To define your own Windows group policy templates, you must purchase a license for the GPAnywhere product from Full Armor. Table 7. Microsoft Enterprise Client Policy for desktops and laptops. This is a moderate policy, balancing security and usability. Access Policy Manager settings for enabling the users firewall.
This policy is used to ensure that the users Microsoft firewall is configured and running. This policy is used for desktop and laptops to help prevent access to unauthorized information. Microsoft Common Usage high for desktops and laptops. This policy is used in managed environments and provides high restrictions on user access to devices, configuration, and applications. Microsoft Common Usage light for desktops and laptops. This policy is used in managed environments, and provides light restrictions on user access to devices, configuration, and applications.
Microsoft Specialized Security Limited Functionality for desktops and laptops. This is a more focused security policy, with greater restrictions on configuration access. Terminal Services for client terminal services. This policy is used in environments where the primary use is terminal services. Microsoft uses the EC and SSLF environment classifications as the basis for making recommendations on how to configure a variety of server, workstation, and laptop settings.
The EC Domain Template is applicable to most enterprise environments. It balances security with usability concerns.
The Group Policy settings suggested for users in EC Domain-classified environments focus on addressing the basics at a moderate level, so it is not intrusive to the user. Examples of settings that are applied as part of the EC Domain Template are:. Disabling automatic saving of passwords in Internet Explorer. Requiring that the user re-enter the password after a system suspend. In such an environment, some usability is sacrificed in order to further secure the systems.
Disabling user access to the IE Security settings. Disabling user access to system tools such as the registry editor. Microsoft common scenarios classify client machines into categories such as mobile, multi-user, app-station, task-station, or kiosk. These scenarios are intended to provide common starting scenarios for group policy management.
The highly- and lightly-managed templates are based on Microsoft Common Scenarios. To standardize the implementation of the scenarios, Microsoft defined the highly-managed and lightly-managed Group Policy settings as the base set of settings on top of which the scenarios would be implemented.
Both the lightly-managed and highly-managed policies are intended for use with devices that work in a centrally managed environment. As such, both templates restrict the options to which a user has access. The distinction between the two is a matter of degree. In the case of the lightly-managed template, the users retain some ability to customize their desktop environment.
Examples of settings that are applied as part of the lightly-managed template are:. Enabling user access only to the Desktop Control Panel applet. In the case of the highly-managed template, the user is given very little leeway to customize the desktop environment. Examples of settings that are applied as part of the highly-managed template are:. Understanding the terminal services task station template.
The terminal services task station template is specific to terminal server users. It prevents users from reverting back to the default security policy but more importantly, it controls which file types. While there are no restrictions on shortcuts. The firewall settings template enables a users firewall. If the Microsoft Windows Firewall is not enabled, group policy starts it.
The final three pre-configured templates help address certain regulatory requirements. They are all based on a basic security policy with their own nuances. Gramm-Leach-Bliley Act GLBA , also known as the Financial Services Modernization Act, enabled investment banks to merge with commercial banks and permitted insurance services to merge with securities companies. As part of this act, privacy policies are required to protect sensitive information from security threats. With GLBA, financial institutions must inform consumers, through a privacy notice, how the company collects, stores, shares, and safeguards the data.
Compliance with the GLBA is mandatory for any financial services company. Examples of settings that are applied as part of the GLBA template:. Digitally signing all communications, if available. Prohibiting the user from modifying any certificate settings.
Prohibiting access to the Advanced Settings menu in Network Connections. The Health Insurance Portability and Accountability Act HIPAA protects people with continued health insurance coverage if they lose or change jobs, and also establishes guidelines for the exchange of patient data, including electronic transmission. There are privacy rules for the use and disclosure of this patient information. Locking the workstation if the smartcard is removed.
Like GLBA and HIPAA, it establishes procedures for processing, storing, and transmitting sensitive data, and offers some protection against security vulnerabilities that may expose that information. Companies using PCI must also go through an outside audit to validate their compliance. There are 12 requirements within 6 major areas of concern: network security monitoring, network security testing, protecting cardholder data, vulnerability management, access control, and policy maintenance.
Examples of settings that are applied as part of the PCI template:. In addition to the preinstalled group policy templates explained above, you can add custom group policy templates, you can download templates installed on the Access Policy Manager, and you can view the configuration of installed templates.
To add a Windows group policy template to the Access Policy Manager. On the Main tab of the navigation pane, expand Access Policy. Hover your mouse pointer over Access Profiles , and click the Windows Group Policy link that appears.
The Windows Group Policy List screen opens. Click Create. The New Windows Group Policy screen opens. In the Name box, type a name for the group policy. In the Description box, type an optional description of the group policy. In the Configuration File box, click Browse to locate the file. Click Finished when the configuration is complete. Click the group policy template that you want to download. The template Properties screen opens. Next to Configuration File , click the Download link.
The web browser pops up a Save file dialog. Click the Save button to save the file. Next to Configuration Details , click the View link. The web browser pops up a save file dialog. Use the Windows group policy action to assure that clients who connect to network access have their computers configured to conform to the security policy required for the duration of the session.
The Windows group policy action popup screen opens. From the Windows group policy list, select the group policy to apply to client computers. For more information on group policy templates, see Understanding Windows group policy templates. In this example, the administrator adds the predefined Gramm-Leach-Bliley Act GLBA Windows group policy template to clients that connect through this branch on the access policy.
The Gramm-Leach-Bliley Act requires financial institutions to inform consumers, through a privacy notice, how the company collects, stores, shares, and safeguards the data. GLBA is mandatory for any financial services company. You can check a client system for the presence and condition of software using these access policy actions that perform software checks:.
When you configure properties for these endpoint security software checks, you can specify what you want to check from the presence of any software to particular vendors and versions. Not all software checks are available on all supported platforms.
The properties screen for a software check provides a Platform setting when multiple platforms are supported. About supported vendor and product ID lists in software checks. When you configure a software check, you can generally select from lists of supported vendors and products. Researchers have shared Sigma rules to help detect this. Microsoft has shared previous information regarding the Print Spooler service and explains that disabling it does carry the trade-off between security and the ability to perform print pruning.
While it is one option for a subpar band-aid fix, another option without disabling the service is restricting the access controls ACLs in the directory that the exploit uses to drop malicious DLLs. This method was brought to light by the team at TrueSec , and we, alongside the community, offer kudos and props for their efforts.
Changing the ACLs prevents rogue DLLs from being placed by the targeted print spooler service and still maintains the service functionality. Follow our live forensics thread in the comments of our Reddit thread. Check out Kevin Beaumont's solid explainer blog. Consider Lares' detection config if you're a Sysmon shop. Fellow researchers have also shared detection rules and techniques to have better visibility on attacks weaponizing PrintNightmare. We will continue to share if we see post-exploitation activity.
We're also keeping a close eye on the ability to craft directory traversing payload paths outside of the previously listed folders doesn't appear to bypass the ACL technique or Olaf Hartung's Defender for Endpoints KQL.
Other security researchers, including Mimikatz author Benjamin Delpy, are observing funky vulnerability behavior some fully patched servers are not vulnerable until promoted to a domain controller. Possible caching? The Huntress agent specifically monitors for hacker activity indicated by the presence of persistence and persistent footholds, like backdoors or implants.
PrintNightmare on its own does not create a persistent foothold , but with the impact of privilege escalation and code execution, it offers the ability for later post-exploitation and persistence. Our team has reviewed the source code for each and confirmed both successfully exploit Server and Server systems. For those technical folks who want to follow along, our team is diving into the exploit's behaviors to help us determine if any Huntress partners have been compromised.
Here's a filtered view of spoolsv. Finds the malicious DLL and executes it. From this quick analysis, we learned there's a handful of directories we can monitor for dropped payloads:.
Fellow security researcher Jake Williams has seen the same success and recommended the following PowerShell snippet:. Search related threads.
Remove From My Forums. Asked by:. Archived Forums. File Services and Storage. Sign in to vote. Hosts are R2 Hyper-V as well.
I have noticed the R2 file server, runs very slow, opening, saving etc. Any thoughts? Tuesday, February 28, PM. Here is a thread discussed before in hyper-v forum, you could take a look.
Wednesday, March 1, AM.
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