In this section:
This page does not apply to SBC 1000/2000 Cloud link units featuring the Microsoft® Cloud Connector Edition application and Intel® Xeon® CPUs, because Microsoft defines alternative procedures to protect against malware.
Overview
Sonus recommends the deployment of an approved third party anti-malware solution to SBC 1000/2000 ASMs with SBA (Applications Solutions Modules running the Skype for Business/Lync 2013 Survivable Branch Appliance application) units as an added measure of security to inspect and “cleanse” devices of viruses and ransomware, such as the 2017 WannaCry https://en.wikipedia.org/wiki/WannaCry_ransomware_attack and Petya attacks.
Sonus approves the following Antivirus and Ransomware protection software for any SBC 1000 or SBC 2000 unit with an Applications Solutions Module shipped with a Microsoft® Skype for Business/Lync Survivable Branch Appliance (SBA) application.
- Sophos® Server Protection for Virtualization, Windows and Linux
- Sophos Endpoint Exploit Prevention
Note that these are Sophos marketing titles. Depending on the country and partner/reseller, the orderable product names may differ. For example, one partner website shows the product names as Sophos Server Protection for Windows, Linux and vShield.
Sophos antimalware software contains a Management Interface (Console+Server+Update Manager) that runs in a separate Windows Server and Antivirus (Agent) software that runs in the ASM/SBA.
Prerequisites
We recommend running the Management Interface and Antivirus separately to conserve CPU processing in ASM/SBA.
- Sonus requires a separate off-board server (distinct and separate from the SBC 1000/2000 ASM) to be the execution platform of the Sophos Management Interface. This deployment model provides the following benefits:
- A single management interface can manage multiple SBC 1000/2000s with the SBA.
- The Sophos Agent minimizes the extra processing load on the SBC 1000/2000's ASM.
The deployment of the Sophos management interface on the SBC 1000/2000 ASM is not supported
- Server is reachable to the ASM node, and ready to manage the antivirus installation.
- This document assumes installation on the ASM/SBA running on Windows Server 2008 R2 and Windows Server 2012 R2.
Installing the Approved Sophos Anti-Malware Solution to Protect SBC 1000/2000 With SBAs
You do not need to configure or modify the ASM in order to install Sophos.
Here are the key steps performed when installing:
| Task | Installation Instructions Covered in Sophos Deployment Guide | Installation Instructions unique to the Sonus SBAs
|
|---|---|---|
Download the Enterprise Console installer |  | |
Check the system requirements | | |
Create the accounts you need | | |
Prepare for installation | | |
Install the Enterprise Console | | |
Download security software | | |
Create computer groups | | |
Set up security policies | | |
Search for computers | | |
Prepare to protect computers | | |
| Protect computers | | |
Check the health of your network | | |
| Add Exclusions | | |
| Activate Exploit Prevention | | |
| Protect the ASM | |
Installation Instructions Unique to the Sonus SBAs
The following are the steps to protect the SBC Edge device with an SBA-targeted ASM:
- Activating Exploit Prevention.
Protecting the ASM.
Adding Exclusions (AntiVirus File/Folder Scan Exclusion List)
Create the antivirus and Host Intrusion Prevention System (HIPS) policy with the file and folder exclusions recommended by Microsoft SBA deployments.
On-Access Scan Settings
C:\windows\SoftwareDistribution\Datastore\
C:\windows\SoftwareDistribution\Datastore\Logs\
C:\Windows\security\database\*.edb
C:\Windows\security\database\*.sdb
C:\Windows\security\database\*.log
C:\Windows\security\database\*.chk
C:\Windows\security\database\*.jrs
C:\Windows\System32\LogFiles\
C:\Windows\Microsoft.NET\assembly\GAC_MSIL\
- C:\UX\PUBLIC\LOGS\
- C:\Program Files\Microsoft Lync Server 2010\
- C:\Program Files\Microsoft Lync Server 2013\
C:\Program Files\Skype for Business Server 2015\
C:\Program Files\Common Files\Microsoft Lync Server 2010\
C:\Program Files\Common Files\Microsoft Lync Server 2013\
C:\Program Files\Common Files\Skype for Business Server 2015\
C:\Program Files\Microsoft SQL Server\MSSQL11.LYNCLOCAL\MSSQL\Binn\SQLServr.exe
C:\Program Files\Microsoft SQL Server\MSSQL12.LYNCLOCAL\MSSQL\Binn\SQLServr.exe
C:\Program Files\Microsoft SQL Server\MSSQL11.RTCLOCAL\MSSQL\Binn\SQLServr.exe
C:\Program Files\Microsoft SQL Server\MSSQL12.RTCLOCAL\MSSQL\Binn\SQLServr.exe
ABServer.exe
- UXSBA.exe
ClsAgent.exe
LysSvc.exe
MediationServerSvc.exe
ReplicaReplicatorAgent.exe
ReplicationApp.exe
RtcHost.exe
RTCSrv.exe
Fabric.exe
FabricDCA.exe
FabricHost.exe
Note that the preceding list of items can be saved in a file using a third party simple text editor and imported into exclusions.
Activating Exploit Prevention
Enter the Exploit Prevention credentials and activate it by performing the following steps:
| Step | Action |
|---|---|
| 1 | Open the console and click View and then Update Managers. Select Update Managers 
|
| 2 | In the Update managers pane, click the appropriate computer name and then View/Edit Configuration.
Select View/Edit Configuration 
|
| 3 | Click Sources > Edit. When the Source Details dialog box opens, apply the credentials and then click OK.
Enter Your Credentials 
|
| 4 | In the Sophos Enterprise Console - Protect Computers Wizard, select Exploit Prevention, Sophos Clean and then click Next.
Select Features 
|
Protecting the ASM
| Step | Action |
|---|---|
| 1 | Create a group. |
| 2 | Add the ASM node into the group. Note: Make sure to choose the Exclusion policy for the group and select Exploit prevent only.
This will install the Agent software with Exploit Prevention and also apply the exclusions.
Discover With Active Directory 
Discover Computers 
|
| 3 | To verify the installation, log on to the ASM node by establishing a Remote Desktop Connection. |
| 4 | Find and open the installed Sophos program and then navigate to Configure antivirus > On-access scanning > Exclusion to verify the exclusions you added in Adding Exclusions (AntiVirus File/Folder Scan Exclusion List). |
| 5 | Confirm that the Exploit prevention is active on the Agent by viewing its listing on View Product Information. |
Sophos Anti-Malware Operation Modes
Differences Between Continuous and Full-Scan Operation
Continuous Operation:
- Sophos Anti-Malware runs in the background and continuously protects the ASM in real time.
- Sophos Anti-Malware contributes a negligible additional load on the CPU. The SBC ASM can be driven to maximum call capacities without regard to the Sophos software.
Full-Scan Operation
- Sophos Anti-Malware can perform a complete system scan ("full scan") and the period of the full scan should be initiated according to Sophos instructions
- When performing a full scan, Sophos Anti-Malware uses a significant proportion of RAM and CPU resources. Full scans should be scheduled for off-peak periods.
Overview
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