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2dbca1ccd9
IP addresses are often seen in the HTTP host field; this change checks if the value in the host field is a valid IP address and processes the Intel::seen event to check for an Intel::ADDR indicator.
53 lines
1.6 KiB
Text
53 lines
1.6 KiB
Text
@load base/frameworks/intel
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@load ./where-locations
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@load base/utils/addrs
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event http_header(c: connection, is_orig: bool, name: string, value: string)
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{
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if ( is_orig )
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{
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switch ( name )
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{
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case "HOST":
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if ( is_valid_ip(value) )
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Intel::seen([$host=to_addr(value),
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$conn=c,
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$where=HTTP::IN_HOST_HEADER]);
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else
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Intel::seen([$indicator=value,
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$indicator_type=Intel::DOMAIN,
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$conn=c,
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$where=HTTP::IN_HOST_HEADER]);
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break;
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case "REFERER":
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Intel::seen([$indicator=sub(value, /^.*:\/\//, ""),
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$indicator_type=Intel::URL,
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$conn=c,
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$where=HTTP::IN_REFERRER_HEADER]);
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break;
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case "X-FORWARDED-FOR":
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if ( is_valid_ip(value) )
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{
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local addrs = find_ip_addresses(value);
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for ( i in addrs )
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{
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Intel::seen([$host=to_addr(addrs[i]),
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$indicator_type=Intel::ADDR,
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$conn=c,
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$where=HTTP::IN_X_FORWARDED_FOR_HEADER]);
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}
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}
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break;
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case "USER-AGENT":
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Intel::seen([$indicator=value,
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$indicator_type=Intel::SOFTWARE,
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$conn=c,
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$where=HTTP::IN_USER_AGENT_HEADER]);
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break;
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}
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}
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}
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