McAfee VirusScan On-Access General Policies must be configured to block the connection when a file with a potentially unwanted program is detected in a shared folder.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-14621	DTAM093	SV-55221r1_rule		Medium

Description
Containment during a virus outbreak is crucial. Infected hosts may attempt to spread malware and will use every network path available to them when spreading that infection. By containing the system when a detection is found, the malware will be restricted to that one system. Likewise, if malware is detected in a shared folder, maintaining the connection between a system and the shared folder would allow the malware to spread. Placing temporary restrictions on network connectivity is an effective mitigation mechanism. These block connection settings will most often be used on a server housing shared folders and files and will block the connection from any network user on a remote computer who attempts to read from, or write to, a threatened file in the shared folder. In addition, it will block the connection from any user on a remote computer who attempts to write an unwanted program to the computer. The connection will be unblocked after the specified amount of time, re-allowing access to the other shared files and folders but will be re-blocked should those same file accesses be attempted.

Description

Containment during a virus outbreak is crucial. Infected hosts may attempt to spread malware and will use every network path available to them when spreading that infection. By containing the system when a detection is found, the malware will be restricted to that one system. Likewise, if malware is detected in a shared folder, maintaining the connection between a system and the shared folder would allow the malware to spread. Placing temporary restrictions on network connectivity is an effective mitigation mechanism. These block connection settings will most often be used on a server housing shared folders and files and will block the connection from any network user on a remote computer who attempts to read from, or write to, a threatened file in the shared folder. In addition, it will block the connection from any user on a remote computer who attempts to write an unwanted program to the computer. The connection will be unblocked after the specified amount of time, re-allowing access to the other shared files and folders but will be re-blocked should those same file accesses be attempted.

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

Details

Check Text ( C-48813r2_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 Blocking tab, locate the "Block" label. Ensure the "Block the connection when a file with a potentially unwanted program is detected in a shared folder" option is checked. Criteria: If the "Block the connection when a file with a potentially unwanted program is detected in a shared folder" option is selected, this is not 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\BehaviourBlocking Criteria: If the value of VSIDBlockOnNonVirus is 1, this is not a finding. If the value is 0, this is a finding.

Check Text ( C-48813r2_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 Blocking tab, locate the "Block" label. Ensure the "Block the connection when a file with a potentially unwanted program is detected in a shared folder" option is checked.

Criteria: If the "Block the connection when a file with a potentially unwanted program is detected in a shared folder" option is selected, this is not 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\BehaviourBlocking

Criteria: If the value of VSIDBlockOnNonVirus is 1, this is not a finding. If the value is 0, this is a finding.

Fix Text (F-48075r2_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 Blocking tab, locate the "Block" label. Select the "Block the connection when a file with a potentially unwanted program is detected in a shared folder" option. Select OK to Save.

Fix Text (F-48075r2_fix)