alert udp $EXTERNAL_NET any -> $HOME_NET 5060 (msg:"ET SCAN Voiper Fuzzing Scan"; content:"sip|3a|tester@"; content:"Via|3a| SIP/2.0"; offset:20; depth:60; threshold:type threshold, track by_dst, count 5, seconds 15; reference:url,sourceforge.net/projects/voiper; classtype:attempted-recon; sid:2008577; rev:3; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)