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597a4d6704
- policy/ renamed to scripts/ - By default BROPATH now contains: - scripts/ - scripts/policy - scripts/site - *Nearly* all tests pass. - All of scripts/base/ is loaded by main.cc - Can be disabled by setting $BRO_NO_BASE_SCRIPTS - Scripts in scripts/base/ don't use relative path loading to ease use of BRO_NO_BASE_SCRIPTS (to copy and paste that script). - The scripts in scripts/base/protocols/ only (or soon will only) do logging and state building. - The scripts in scripts/base/frameworks/ add functionality without causing any additional overhead. - All "detection" activity happens through scripts in scripts/policy/. - Communications framework modified temporarily to need an environment variable to actually enable (ENABLE_COMMUNICATION=1) - This is so the communications framework can be loaded as part of the base without causing trouble when it's not needed. - This will be removed once a resolution to ticket #540 is reached.
47 lines
1.2 KiB
Text
47 lines
1.2 KiB
Text
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module SMTP;
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export {
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redef enum Notice::Type += {
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Suspicious_Origination
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};
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## Places where it's suspicious for mail to originate from represented as
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## all-capital, two character country codes (e.x. US). It requires
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## libGeoIP support built in.
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const suspicious_origination_countries: set[string] = {} &redef;
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const suspicious_origination_networks: set[subnet] = {} &redef;
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}
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event log_smtp(rec: Info)
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{
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local ip: addr;
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local loc: geo_location;
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if ( rec?$x_originating_ip )
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{
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ip = rec$x_originating_ip;
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loc = lookup_location(ip);
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if ( loc$country_code in suspicious_origination_countries ||
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ip in suspicious_origination_networks )
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{
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NOTICE([$note=Suspicious_Origination,
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$msg=fmt("An email originated from %s (%s).", loc$country_code, ip),
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$id=rec$id]);
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}
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}
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if ( rec?$path )
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{
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ip = rec$path[|rec$path|-1];
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loc = lookup_location(ip);
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if ( loc$country_code in suspicious_origination_countries ||
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ip in suspicious_origination_networks )
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{
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NOTICE([$note=Suspicious_Origination,
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$msg=fmt("Based up Received headers, email originated from %s (%s).", loc$country_code, ip),
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$id=rec$id]);
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}
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}
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}
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