Malware threat feed from EMS

A FortiGate can pull malware threat feeds from FortiClient EMS, which in turn receives malware hashes detected by FortiClients. The malware hash can be used in an antivirus profile when AV scanning is enabled with block or monitor actions. This feature is supported in proxy and flow mode.

If an external malware blocklist and the FortiGuard outbreak prevention database are also enabled in the antivirus profile, the checking order is: AV local database, EMS threat feed, external malware blocklist, FortiGuard outbreak prevention database. If the EMS threat feed and external malware blocklist contain the same hash value, then the EMS infection will be reported if both of them are blocked.

To configure an EMS threat feed in an antivirus profile in the GUI:

1. Enable the EMS threat feed:
   1. Go to Security Fabric > Fabric Connectors and double-click the FortiClient EMS card.
   2. Enable EMS threat feed.
   3. Configure the other settings if needed (see Configuring FortiClient EMS for more details).
   4. Click OK.
2. Create the antivirus profile:
   1. Go to Security Profiles > AntiVirus and click Create New.
   2. In the Virus Outbreak Prevention section, enable Use EMS threat feed.
   3. Configure the other settings as needed.

      

   4. Click OK.

To configure an EMS threat feed in an antivirus profile in the CLI:

1. Enable the EMS threat feed:

   config endpoint-control fctems
       edit "WIN10-EMS"
           set fortinetone-cloud-authentication disable
           set server "192.168.20.10"
           set https-port 443
           set source-ip 0.0.0.0
           set pull-sysinfo enable
           set pull-vulnerabilities enable
           set pull-avatars enable
           set pull-tags enable
           set pull-malware-hash enable
           unset capabilities
           set call-timeout 30
           set websocket-override disable
       next
   end

2. Create the antivirus profile:

   config antivirus profile
       edit "av"
           config http
               set av-scan block
           end
           config ftp
               set av-scan block
           end
           config imap
               set av-scan block
           end
           config pop3
               set av-scan block
           end
           config smtp
               set av-scan block
           end
           config cifs
               set av-scan block
           end
           set external-blocklist-enable-all enable
           set ems-threat-feed enable
       next
   end

Sample log

# execute log filter category utm-virus
# execute log display

1: date=2021-03-19 time=16:06:46 eventtime=1616195207055607417 tz="-0700" logid="0208008217" type="utm" subtype="virus" eventtype="ems-threat-feed" level="notice" vd="vd1" policyid=1 msg="Detected by EMS threat feed." action="monitored" service="HTTPS" sessionid=1005 srcip=10.1.100.24 dstip=172.16.200.214 srcport=54674 dstport=443 srcintf="port2" srcintfrole="undefined" dstintf="port1" dstintfrole="undefined" proto=6 direction="incoming" filename="creditcardSSN.pdf" quarskip="Quarantine-disabled" virus="Email scan" dtype="File Hash" filehash="22466078c2d52dfd5ebbbd6c4207ddec6ac61aa82f960dc54cfbc83b8eb42ed1" filehashsrc="test" url="https://172.16.200.214/hash/creditcardSSN.pdf" profile="av" agent="curl/7.68.0" analyticssubmit="false" crscore=10 craction=2 crlevel="medium"

2: date=2021-03-19 time=16:06:13 eventtime=1616195173832494609 tz="-0700" logid="0208008216" type="utm" subtype="virus" eventtype="ems-threat-feed" level="warning" vd="vd1" policyid=1 msg="Blocked by EMS threat feed." action="blocked" service="HTTPS" sessionid=898 srcip=10.1.100.24 dstip=172.16.200.214 srcport=54672 dstport=443 srcintf="port2" srcintfrole="undefined" dstintf="port1" dstintfrole="undefined" proto=6 direction="incoming" filename="BouncingButton.pdf" quarskip="Quarantine-disabled" virus="Email scan" dtype="File Hash" filehash="a601431acd5004c37bf8fd02fccfdacbb54b27c8648d1d41ad14fa3eaf8651d3" filehashsrc="test" url="https://172.16.200.214/hash/BouncingButton.pdf" profile="av" agent="curl/7.68.0" analyticssubmit="false" crscore=10 craction=2 crlevel="medium"