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windows/security/threat-protection/device-control/control-usb-devices-using-intune.md
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@ -8,7 +8,7 @@ ms.pagetype: security
ms.localizationpriority: medium
ms.author: justinha
author: justinha
ms.date: 12/13/2018
ms.date: 12/14/2018
---
# How to control USB devices and other removable media using Windows Defender ATP
@ -22,7 +22,7 @@ Windows Defender ATP provides multiple monitoring and control features for USB p
- [Protect against threats](#protect-against-threats) introduced by removable storage devices by enabling:
- [Windows Defender Antivirus real-time protection (RTP)](https://docs.microsoft.com/windows/security/threat-protection/windows-defender-antivirus/configure-real-time-protection-windows-defender-antivirus) to scan removable storage for malware.
- [Exploit Guard Attack Surface Reduction (ASR) USB rule](https://docs.microsoft.com/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard) to block untrusted and unsigned processes that run from USB.
- [Direct Memory Access (DMA) protection settings](#protect-dma) to mitigate DMA attacks, including [Kernel DMA Protection for Thunderbolt](https://docs.microsoft.com/windows/security/information-protection/kernel-dma-protection-for-thunderbolt) and blocking DMA until a user signs in.
- [Direct Memory Access (DMA) protection settings](#protect-against-direct-memory-access--dma--attacks) to mitigate DMA attacks, including [Kernel DMA Protection for Thunderbolt](https://docs.microsoft.com/windows/security/information-protection/kernel-dma-protection-for-thunderbolt) and blocking DMA until a user signs in.
> [!NOTE]
> These threat reduction measures help prevent malware from coming into your environment. To protect enterprise data from leaving your environment, you can also configure data loss prevention measures. For example, on Windows 10 devices you can configure [BitLocker](https://docs.microsoft.com/windows/security/information-protection/bitlocker/bitlocker-overview) and [Windows Information Protection](https://docs.microsoft.com/windows/security/information-protection/windows-information-protection/create-wip-policy-using-intune-azure), which will encrypt company data even if it is stored on a personal device, or use the [Storage/RemovableDiskDenyWriteAccess CSP](https://docs.microsoft.com/windows/client-management/mdm/policy-csp-storage#storage-removablediskdenywriteaccess) to deny write access to removable disks.
@ -151,16 +151,19 @@ These settings require [enabling real-time protection](https://docs.microsoft.co
7. Click **Create** to save the profile.
### Protect against DMA attacks
### Protect against Direct Memory Access (DMA) attacks
DMA attacks can lead to disclosure of sensitive information residing on a PC, or even injection of malware that allows attackers to bypass the lock screen or control PCs remotely. The following settings help to protect against DMA attacks:
DMA attacks can lead to disclosure of sensitive information residing on a PC, or even injection of malware that allows attackers to bypass the lock screen or control PCs remotely. The following settings help to prevent DMA attacks:
1. Beginning with Windows 10 version 1803, Microsoft introduced [Kernel DMA Protection for Thunderbolt](https://docs.microsoft.com/windows/security/information-protection/kernel-dma-protection-for-thunderbolt) to provide native protection against DMA attacks via Thunderbolt ports. Kernel DMA Protection for Thunderbolt is built in to Windows 10 devices by equipment manufacturers and it can't be turned off.
1. Beginning with Windows 10 version 1803, Microsoft introduced [Kernel DMA Protection for Thunderbolt](https://docs.microsoft.com/windows/security/information-protection/kernel-dma-protection-for-thunderbolt) to provide native protection against DMA attacks via Thunderbolt ports. Kernel DMA Protection for Thunderbolt is enabled by system manufacturers and cannot be turned on or off by users.
You can add protection by configuring the [DMA Guard CSP](https://docs.microsoft.com/windows/client-management/mdm/policy-csp-dmaguard#dmaguard-deviceenumerationpolicy). This is an additional control for devices that don't support memory isolation such as DMA-remapping. These devices can be blocked, allowed, or allowed only after the user signs in. Devices that do support memory isolation can always connect.
Beginning with Windows 10 version 1809, you can adjust the level of Kernel DMA Protection by configuring the [DMA Guard CSP](https://docs.microsoft.com/windows/client-management/mdm/policy-csp-dmaguard#dmaguard-deviceenumerationpolicy). This is an additional control for devices that don't support device memory isolation (also known as DMA-remapping). These devices can be blocked, allowed, or allowed only after the user signs in (default). Devices that do support device memory isolation can always connect.
2. On Windows 10 systems that do not suppprt Kernel DMA Protection, you can:
- [Block DMA until a user signs in](https://docs.microsoft.com/windows/client-management/mdm/policy-csp-dataprotection#dataprotection-allowdirectmemoryaccess)
- [Block all connections via the Thunderbolt ports (including USB devices)](https://support.microsoft.com/help/2516445/blocking-the-sbp-2-driver-and-thunderbolt-controllers-to-reduce-1394-d)
2. On other Windows 10 devices, you can also block DMA until a user signs in. For more information, see the
[Allow Direct Memory Access CSP](https://docs.microsoft.com/windows/client-management/mdm/policy-csp-dataprotection#dataprotection-allowdirectmemoryaccess).
## Related topics