alert udp $HOME_NET any -> $EXTERNAL_NET 1434 (msg:"GPL WORM Slammer Worm propagation attempt OUTBOUND"; content:"|04|"; depth:1; content:"|81 F1 03 01 04 9B 81 F1|"; content:"sock"; content:"send"; reference:bugtraq,5310; reference:bugtraq,5311; reference:cve,2002-0649; reference:nessus,11214; reference:url,vil.nai.com/vil/content/v_99992.htm; classtype:misc-attack; sid:2102004; rev:8; metadata:created_at 2010_09_23, cve CVE_2002_0649, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)