[netsa-tools-discuss] analysis pipeline alerting issues with EVAL block

[asad]

Hello,

I have a very simple alerting requirement

"
when a destination ports matches ports which are considered as 'worm ports'
traffic is send to 5 different unique ips in 5 minutes time.

"

I know on traffic level i'm getting required data since using traffic logs
from the cisco asa (same device is also sending netflows) and it works as
expected. I'm suppose to see an ip address but on alert.log I see nothing.
Below is the logic.

Any help?



FILTER outgoing-flows
TYPENAME IN_LIST [in,int2int,out,outweb,outicmp]
SIP NOT_IN_LIST "/root/silkydata/DMZ.set"
SIP NOT_IN_LIST "/root/silkydata/voip.set"
SIP NOT_IN_LIST "/root/silkydata/rns.set"
END FILTER

FILTER non-local-to-remote
TYPENAME IN_LIST [in,int2int,out,outweb,outicmp]
SIP NOT_IN_LIST "/root/silkydata/DMZ.set"
SIP NOT_IN_LIST "/root/silkydata/voip.set"
SIP NOT_IN_LIST "/root/silkydata/rns.set"
DPORT IN_LIST [135, 136, 137, 138, 139, 444, 445, 995, 996, 997, 998, 999,
8998, 3127, 3128, 3129, 3130, 3131, 3132, 3133, 3134, 3135, 3136, 3137,
3138, 3139, 3140, 3141, 3142, 3143,3146, 3147, 31$
END FILTER


EVALUATION  Systems_using_many_different_protocols
FILTER  non-local-to-remote
FOREACH SIP
CHECK THRESHOLD
DISTINCT DIP > 25
TIME_WINDOW 3600 SECONDS
END CHECK
SEVERITY 7
ALERT JUST_NEW_THIS_TIME
ALERT ALWAYS
CLEAR NEVER
END EVALUATION
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