93 lines
3.6 KiB
Plaintext
93 lines
3.6 KiB
Plaintext
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/**
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* This file is part of Rubanetra.
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* Copyright (C) 2013,2014 Stefan Swerk (stefan_rubanetra@swerk.priv.at)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import at.jku.fim.rubanetra.protocol.activity.*;
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import at.jku.fim.rubanetra.protocol.activity.tls.*;
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import at.jku.fim.rubanetra.protocol.activity.http.*;
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import at.jku.fim.rubanetra.protocol.activity.ip.*;
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import at.jku.fim.rubanetra.protocol.activity.icmp.*;
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import at.jku.fim.rubanetra.protocol.activity.dns.*;
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import java.util.SortedSet;
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import java.util.TreeSet;
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import org.xbill.DNS.Record;
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import java.net.InetSocketAddress;
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import java.util.List;
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import java.util.Set;
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import java.util.HashSet;
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// using the MVEL expression language, see http://mvel.codehaus.org/
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dialect "mvel"
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/**
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* A logger that may be used for logging custom messages
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*/
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global org.slf4j.Logger log;
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// forward declaration
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declare DroolsBaseActivity
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end
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/**
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* A DropboxTlsActivity contains a DNS query/reply, client/server address/port and the associated Tls-Activity
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*/
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declare DropboxTlsActivity extends DroolsBaseActivity
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@role( event )
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@author( Stefan Swerk )
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@timestamp( getStartTimestamp() )
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dnsQuestion : DnsActivity
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dnsAnswer : DnsActivity
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clientAddress : InetSocketAddress
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serverAddress : InetSocketAddress
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associatedTlsActivity : TlsActivity
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end
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/**
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* Due to the generally encrypted dropbox traffic a DnsActivity containing the rule looks for query to "*.dropbox.com"
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* first and gathers the relevant Ip-Addresses for which possible TlsActivitiy-objects will be probed against.
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*/
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rule "Dropbox TLS traffic based on previous DnsActivity"
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when
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$dnsQuery : DnsActivity(!isResponse(), !questionRecords.isEmpty(),
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$queryId : dnsMessageHeader.ID,$question : dnsMessage.question.name,
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$question.toString() matches ".*\\.dropbox.com\\.$")
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$dnsReply : DnsActivity(isResponse(),!answerRecords.isEmpty(),
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dnsMessageHeader.ID == $queryId,
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this after[0s,10s] $dnsQuery)
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$tls : TlsActivity(this after[0s,10s] $dnsReply)
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exists ( ARecord( $address : getAddress(),
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$address!.getHostAddress() == $tls.getServerHello().getSourceAddress().getHostAddress())
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from $dnsReply.getAnswerRecords()
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or AAAARecord( $address : getAddress(),
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$address!.getHostAddress() == $tls.getServerHello().getSourceAddress().getHostAddress())
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from $dnsReply.getAnswerRecords()
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)
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not ( exists DropboxTlsActivity($tls == associatedTlsActivity))
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then
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DropboxTlsActivity act = new DropboxTlsActivity();
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act.setClientAddress($tls.getClientHello().getSourceSocketAddress());
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act.setServerAddress($tls.getServerHello().getSourceSocketAddress());
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act.setDnsQuestion($dnsQuery);
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act.setDnsAnswer($dnsReply);
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act.setAssociatedTlsActivity($tls);
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act.replaceActivity($dnsQuery); act.replaceActivity($dnsReply); act.replaceActivity($tls);
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insert(act);
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end
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