Shell Script Analysis Support for Wildfire Inline ML

Update your existing Antivirus Security profile to enable the shell script analysis and classification engine.
Select an existing
Antivirus Profile
or
Add
a new one (
Objects > Security Profiles > Antivirus
).
Configure your Antivirus profile.
Select
WildFire Inline ML
and apply an
Action Setting
for the new WildFire inline ML model. This enforces WildFire inline ML Actions settings for each protocol on a per-model basis. In addition to the currently available classification engines,
Shell
should now be available. If this model is unavailable, verify that you have content release 8543 or later installed on the firewall.

enable (inherit per-protocol actions)
—WildFire inspects traffic according to your selections in the WildFire Inline ML Action column in the decoders section of the
Action
tab.
alert-only (override more strict actions to alert)
—WildFire inspects traffic according to your selections in the WildFire Inline ML Action column in the decoders section of the
Action
tab and overrides any action with a severity level higher than
alert
(
drop
,
reset-client
,
reset-server
,
reset-both
)
alert
, which allows traffic to pass while still generating and saving an alert in the threat logs.
disable (for all protocols)
—WildFire allows traffic to pass without any policy action.
Click
OK
to exit the Antivirus Profile configuration dialog and
Commit
your new settings.
(
Optional
) Add file exceptions to your Antivirus Security profile if you encounter false-positives. This is typically done for users who are not forwarding files to WildFire for analysis. You can add the file exception details directly to the exception list or by specifying a file from the threat logs.
If your firewall WildFire Analysis security profile is configured to forward shell scripts, false-positives are automatically corrected as they are received. If you continue to see ml-virus alerts for scripts that have been classified as benign by WildFire Analysis, please contact Palo Alto Networks Support.
Add file exceptions directly to the exceptions list.
Select
Objects > Security Profiles > Antivirus
.
Select an Antivirus profile for which you want to exclude specific files and then select
WildFire Inline ML
.
Add the hash, filename, and description of the file that you want to exclude from enforcement.

Click
OK
to save the Antivirus profile and then
Commit
your changes.
Add file exceptions from threat logs entries.
Select
Monitor > Logs > Threat
and filter the logs for the
ml-virus
threat type. Select a threat log for a file for which you wish to create a file exception.
Go to the
Detailed Log View
and scroll to
Details
and then
Create Exception
.
Add a
Description
and click
OK
to add the file exception.
You can find the new file exception in the
File Exceptions
list (
Objects
Security Profiles
Antivirus
WildFire Inline ML
.
(Optional)
See Configure WildFire Inline ML for information about testing your firewall’s connection to the inline ML cloud service and viewing related logs.