Chapter 15 Security Profiles : AntiVirus : Antivirus concepts : Windows file sharing (CIFS) : Configuring CIFS/SMB/SAMBA virus scanning
  
Configuring CIFS/SMB/SAMBA virus scanning
Use the following command to enable CIFS/SMB/SAMBA virus scanning in an antivirus profile:
config antivirus profile
edit <smb-profile>
config smb
set options scan
end
Then add this antivirus profile to a security policy that accepts the traffic to be virus scanned. In the security policy the service can be set to ANY, SAMBA, or SMB.
config firewall policy
edit 0
set service ANY
...
set utm-status enable
set av-profile <smb-profile>
end