alert udp $EXTERNAL_NET any -> $HOME_NET 5060 (msg:"ET SCAN sipscan probe"; content:"sip|3a|thisisthecanary@"; content:"sip|3a|test@"; offset:30; depth:70; reference:url,www.hackingvoip.com/sec_tools.html; classtype:attempted-recon; sid:2008641; rev:4; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)