McAfee VirusScan On-Access General Policies must be configured to not exclude any URL scripts from being scanned unless the URL exclusions have been documented with, and approved by, the ISSO/ISSM/DAA.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-42539	DTAM160	SV-55267r3_rule		Medium

Description
Many attackers use toolkits containing several different types of utilities and scripts that can be used to probe and attack hosts. Scripts are a common carrier of malware and none should be excluded from scanning. In the unlikely event that excluding scanning a script impacts the operational function and/or availability of a system, and reasonable mitigation efforts have been put into place, the exclusion may be put into place but must be documented with, and approved by, the ISSO/ISSM/DAA.

Description

Many attackers use toolkits containing several different types of utilities and scripts that can be used to probe and attack hosts. Scripts are a common carrier of malware and none should be excluded from scanning. In the unlikely event that excluding scanning a script impacts the operational function and/or availability of a system, and reasonable mitigation efforts have been put into place, the exclusion may be put into place but must be documented with, and approved by, the ISSO/ISSM/DAA.

STIG	Date
McAfee VirusScan 8.8 Managed Client STIG	2019-09-24

Details

Check Text ( C-48857r3_chk )
From the ePO server console System Tree, select the Systems tab, select the asset to be checked, select Actions, select Agent, and select Modify Policies on a Single System. From the product pull down list, select VirusScan Enterprise 8.8.0. Select from the Policy column the policy associated with the On-Access General Policies. Under the ScriptScan tab, locate the "ScriptScan exclusions:" label. Ensure there are no exclusions listed in the URL field. Criteria: If there are no exclusions listed in the URL field, this is a not finding. If there are exclusions listed in the URL field, and the exclusions have been documented with, and approved by, the ISSO/ISSM/DAA, this is not a finding. If there are exclusions listed in the URL field, and the exclusions have not been documented with, and approved by, the ISSO/ISSM/DAA, this is a finding. On the client machine, use the Windows Registry Editor to navigate to the following key: HKLM\Software\McAfee\ (32-bit) HKLM\Software\Wow6432Node\McAfee\ (64-bit) SystemCore\VSCore\Script Scanner Criteria: If the ExcludedURLs REG_MULTI_SZ has any entries, and the excluded URLs have not been documented with, and approved by, the ISSO/ISSM/DAA, this is a finding.

Check Text ( C-48857r3_chk )

From the ePO server console System Tree, select the Systems tab, select the asset to be checked, select Actions, select Agent, and select Modify Policies on a Single System. From the product pull down list, select VirusScan Enterprise 8.8.0. Select from the Policy column the policy associated with the On-Access General Policies. Under the ScriptScan tab, locate the "ScriptScan exclusions:" label. Ensure there are no exclusions listed in the URL field.

Criteria: If there are no exclusions listed in the URL field, this is a not finding.
If there are exclusions listed in the URL field, and the exclusions have been documented with, and approved by, the ISSO/ISSM/DAA, this is not a finding.
If there are exclusions listed in the URL field, and the exclusions have not been documented with, and approved by, the ISSO/ISSM/DAA, this is a finding.

On the client machine, use the Windows Registry Editor to navigate to the following key:
HKLM\Software\McAfee\ (32-bit)
HKLM\Software\Wow6432Node\McAfee\ (64-bit)
SystemCore\VSCore\Script Scanner

Criteria: If the ExcludedURLs REG_MULTI_SZ has any entries, and the excluded URLs have not been documented with, and approved by, the ISSO/ISSM/DAA, this is a finding.

Fix Text (F-48121r2_fix)
From the ePO server console System Tree, select the Systems tab, select the asset to be checked, select Actions, select Agent, and select Modify Policies on a Single System. From the product pull down list, select VirusScan Enterprise 8.8.0. Select from the Policy column the policy associated with the On-Access General Policies. Under the ScriptScan tab, locate the "ScriptScan exclusions" label. Remove any exclusions listed in the URL field.

Fix Text (F-48121r2_fix)