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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-42531	DTAM153	SV-55259r4_rule		Medium

Description
When scanning for malware, excluding specific files will increase the risk of a malware-infected file going undetected. By configuring antivirus software without any exclusions, the scanner has a higher success rate at detecting and eradicating malware.

STIG	Date
McAfee VirusScan 8.8 Managed Client STIG	2017-04-05

Details

Check Text ( C-48849r6_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 Default Processes Policies. Under the Exclusions tab, locate the "What not to scan:" label. Ensure there are no exclusions listed. If exclusions are listed, verify they have been documented and approved by the ISSO/ISSM/DAA. Criteria: If there are no exclusions listed in the "What not to scan:" field, this is a not finding. If there are exclusions listed in the "What not to scan:" field, and the exclusions have been documented with, and approved by, the ISSO/ISSM/AO, this is not a finding. If there are exclusions listed in the "What not to scan:" field, and the exclusions have not been documented with, and approved by, the ISSO/ISSM/AO, 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\On Access Scanner\McShield\Configuration\Default Criteria: If the value NumExcludeItems is 0, this is not a finding. If NumExcludeItems is not 1 or greater, and exclusions have not been documented with and approved by the ISSO/ISSM/AO, this is a finding. If NumExcludeItems is 1 or greater, and exclusions have been approved by the ISSO/ISSM/AO, this is not a finding.

Check Text ( C-48849r6_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 Default Processes Policies. Under the Exclusions tab, locate the "What not to scan:" label. Ensure there are no exclusions listed. If exclusions are listed, verify they have been documented and approved by the ISSO/ISSM/DAA.

Criteria: If there are no exclusions listed in the "What not to scan:" field, this is a not finding.
If there are exclusions listed in the "What not to scan:" field, and the exclusions have been documented with, and approved by, the ISSO/ISSM/AO, this is not a finding.
If there are exclusions listed in the "What not to scan:" field, and the exclusions have not been documented with, and approved by, the ISSO/ISSM/AO, 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\On Access Scanner\McShield\Configuration\Default

Criteria: If the value NumExcludeItems is 0, this is not a finding.
If NumExcludeItems is not 1 or greater, and exclusions have not been documented with and approved by the ISSO/ISSM/AO, this is a finding.
If NumExcludeItems is 1 or greater, and exclusions have been approved by the ISSO/ISSM/AO, this is not a finding.

Fix Text (F-48113r2_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 Default Processes Policies. Under the Exclusions tab, locate the "What not to scan:" label. Remove any exclusions listed.

Fix Text (F-48113r2_fix)