sec/portscan.sec
Stefan Schulze Frielinghaus d106b2f2cd - New upstream release
- SPEC file cleanup
- Init script cleanup
- Removed some examples because of licensing issues. Upstream has clarified
    and changed most of the license tags to GPLv2. Additionally, upstream
    will include the examples in the next release.
- Removed a provide statement since a period was in the name and no other
    package required that special name.
2009-10-03 07:35:41 +00:00

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################################################################
# Sample SEC ruleset for "PORTSCAN FROM ip1 TO ip2:port" events
#
# Copyright (C) 2003-2009 Risto Vaarandi
# This is free software. You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
################################################################
# process "PORTSCAN FROM ip1 TO ip2:port" events, and if a certain
# source host has scanned the same destination port on more than
# 10 distinct destination hosts during 60 seconds, raise an alarm
type=Single
ptype=RegExp
pattern=PORTSCAN FROM (\S+) TO \S+:(\d+)
context=!HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$2
continue=TakeNext
desc=Horizontal port sweep started from source $1 to target port $2
action=eval %o ( $portscans{"$1:$2"} = {} ); \
create HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$2 60 \
eval %o ( delete $portscans{"$1:$2"} )
type=Single
ptype=RegExp
pattern=PORTSCAN FROM (\S+) TO (\S+):(\d+)
context=HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$3
continue=TakeNext
desc=Scanned destination IP: $2
action=eval %o ( $portscans{"$1:$3"}->{$2} = 1 ); \
add HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$3 %t: %s;\
set HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$3 60 \
eval %o ( delete $portscans{"$1:$3"} )
type=Single
ptype=RegExp
pattern=PORTSCAN FROM (\S+) TO (\S+):(\d+)
context=HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$3 \
&& =( scalar(keys(%{$portscans{"$1:$3"}})) > 10 )
continue=DontCont
desc=$1 has scanned more than 10 destinations
action=report HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$3 \
mail -s 'Horizontal port sweep from $1 target port $3' root@example.com; \
delete HORIZONTAL_PORTSWEEP_FROM_SOURCE_IP_$1_TO_TARGET_PORT_$3; \
eval %o ( delete $portscans{"$1:$3"} )