The Enhanced Mitigation Experience Toolkit (EMET) Default Actions and Mitigations Settings must enable Deep Hooks.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63417	WN10-EM-000040	SV-77907r2_rule		Medium

Description
Attackers are constantly looking for vulnerabilities in systems and applications. The Enhanced Mitigation Experience Toolkit can enable several mechanisms, such as Data Execution Prevention (DEP), Address Space Layout Randomization (ASLR), and Structured Exception Handler Overwrite Protection (SEHOP) on the system and applications adding additional levels of protection. This setting enables the Deep Hooks mitigation on a system which protects lower level APIs that are used by critical top level APIs.

Description

Attackers are constantly looking for vulnerabilities in systems and applications. The Enhanced Mitigation Experience Toolkit can enable several mechanisms, such as Data Execution Prevention (DEP), Address Space Layout Randomization (ASLR), and Structured Exception Handler Overwrite Protection (SEHOP) on the system and applications adding additional levels of protection. This setting enables the Deep Hooks mitigation on a system which protects lower level APIs that are used by critical top level APIs.

STIG	Date
Windows 10 Security Technical Implementation Guide	2016-11-03

Details

Check Text ( C-64165r3_chk )
This is applicable to unclassified systems, for other systems this is NA. If EMET has not been installed and DEP and SEHOP are configured as required in V-68845 and V-68849, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\EMET\SysSettings\ Value Name: DeepHooks Value Type: REG_DWORD Value: 1

Check Text ( C-64165r3_chk )

This is applicable to unclassified systems, for other systems this is NA.

If EMET has not been installed and DEP and SEHOP are configured as required in V-68845 and V-68849, this is NA.

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\EMET\SysSettings\

Value Name: DeepHooks

Value Type: REG_DWORD
Value: 1

Fix Text (F-69345r1_fix)
This is applicable to unclassified systems, for other systems this is NA. Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> EMET >> "Default Actions and Mitigation Settings" to "Enabled" with "Enabled" selected for "Deep Hooks:". Note: The Enhanced Mitigation Experience Toolkit must be installed on the system and the administrative template files added to make this setting available.

Fix Text (F-69345r1_fix)

This is applicable to unclassified systems, for other systems this is NA.

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> EMET >> "Default Actions and Mitigation Settings" to "Enabled" with "Enabled" selected for "Deep Hooks:".

Note: The Enhanced Mitigation Experience Toolkit must be installed on the system and the administrative template files added to make this setting available.