On 9/28/2016 9:02 AM, Nicola Piazzi wrote:
Usually we receive spam having subjects like these examples in order
of time :
Subject From To
FedEx Shipment 702193383647 Notification
j...@company1.com s...@mycompany.it
FedEx Shipment 722566383641 Notification
a...@other.com a...@mycompany.it
FedEx Shipment 734563383644 Notification
i...@company1.com lo...@mycompany.it
A package for you jim b...@cocacola.com j...@mycompany.it
A package for you sue j...@buster.com s...@mycompany.it
These come from viruses that infect different pcs in the word that
send same spam
I want to write a plugin that test each email giving penality to these
mails
Detection routine
A mail arrive
Subject is : FedEx Shipment 702193383647 Notification
I search in maillog table for a regex that MATCH FedEx Shipment
702193383647 Notification ALSO IN FedEx Shipment 722566383641
Notification AND IN FedEx Shipment 734563383644 Notification
If it match I verify that FROM DOMAIN IS DIFFERENT
And then I verify that TO ADDRESS IS DIFFERENT
Now I need a regex sintax to put all extracted words of PHRASE FedEx
Shipment 734563383644 Notification and match if it found at least 3 of
4 words
Someone can help ?
I don't follow exactly what you are trying to do in the description
above, but for that problem, I would start with something like this:
header __FEDEX_ADDR From:addr /\@fedex\.com/
header __FEDEX_SUBJ Subject /FedEx Shipment/
meta FEDEX_SPAM __FEDEX_SUBJ && ! __FEDEX_ADDR
score FEDEX_SPAM 2.0
(Off the top of my head and completely untested. Adjust score as required.)
This will hit any email with "FedEx Shipment" in the subject that
doesn't come from fedex.com. Note that it will also hit on any
legitimate FedEx emails that have been forwarded. You could minimize
this by constraining the subject match to be at the beginning of the
line (/^Fedex Shipment/). This may or may not have an effect on spam
detection. You could also do a test for non-FedEx urls in the body
rather than looking at the sender.
You could use a simple subject line test for the "A package for you"
emails, unless you know of a valid delivery service that uses that phrase.
--
Bowie
