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Added protocol to the traceroute detection script.

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This commit is contained in:
Seth Hall 2013-04-26 12:24:46 -04:00
parent 48cbb31747
commit 04410237c2
1 changed files with 15 additions and 10 deletions
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25
scripts/policy/misc/detect-traceroute/main.bro
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@ -39,11 +39,13 @@ export {
## The log record for the traceroute log. ## The log record for the traceroute log.
type Info: record { type Info: record {
## Timestamp ## Timestamp
ts: time &log; ts: time &log;
## Address initiaing the traceroute. ## Address initiaing the traceroute.
src: addr &log; src: addr &log;
## Destination address of the traceroute. ## Destination address of the traceroute.
dst: addr &log; dst: addr &log;
## Protocol used for the traceroute.
proto: string &log;
}; };
global log_traceroute: event(rec: Traceroute::Info); global log_traceroute: event(rec: Traceroute::Info);
@ -69,14 +71,15 @@ event bro_init() &priority=5
$threshold=icmp_time_exceeded_threshold, $threshold=icmp_time_exceeded_threshold,
$threshold_crossed(key: SumStats::Key, result: SumStats::Result) = $threshold_crossed(key: SumStats::Key, result: SumStats::Result) =
{ {
local parts = split1(key$str, /-/); local parts = split_n(key$str, /-/, F, 2);
local src = to_addr(parts[1]); local src = to_addr(parts[1]);
local dst = to_addr(parts[2]); local dst = to_addr(parts[2]);
Log::write(LOG, [$ts=network_time(), $src=src, $dst=dst]); local proto = parts[3];
Log::write(LOG, [$ts=network_time(), $src=src, $dst=dst, $proto=proto]);
NOTICE([$note=Traceroute::Detected, NOTICE([$note=Traceroute::Detected,
$msg=fmt("%s seems to be running traceroute", src), $msg=fmt("%s seems to be running traceroute using %s", src, proto),
$src=src, $dst=dst, $src=src,
$identifier=cat(src)]); $identifier=cat(src,proto)]);
}]); }]);
} }
@ -84,10 +87,12 @@ event bro_init() &priority=5
event signature_match(state: signature_state, msg: string, data: string) event signature_match(state: signature_state, msg: string, data: string)
{ {
if ( state$sig_id == /traceroute-detector.*/ ) if ( state$sig_id == /traceroute-detector.*/ )
SumStats::observe("traceroute.low_ttl_packet", [$str=cat(state$conn$id$orig_h,"-",state$conn$id$resp_h)], [$num=1]); {
SumStats::observe("traceroute.low_ttl_packet", [$str=cat(state$conn$id$orig_h,"-",state$conn$id$resp_h,"-",get_port_transport_proto(state$conn$id$resp_p))], [$num=1]);
}
} }
event icmp_time_exceeded(c: connection, icmp: icmp_conn, code: count, context: icmp_context) event icmp_time_exceeded(c: connection, icmp: icmp_conn, code: count, context: icmp_context)
{ {
SumStats::observe("traceroute.time_exceeded", [$str=cat(context$id$orig_h,"-",context$id$resp_h)], [$str=cat(c$id$orig_h)]); SumStats::observe("traceroute.time_exceeded", [$str=cat(context$id$orig_h,"-",context$id$resp_h,"-",get_port_transport_proto(context$id$resp_p))], [$str=cat(c$id$orig_h)]);
} }