alert icmp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET WORM Allaple ICMP Sweep Ping Outbound"; icode:0; itype:8; content:"Babcdefghijklmnopqrstuvwabcdefghi"; threshold:type both, count 1, seconds 60, track by_src; reference:url,www.sophos.com/virusinfo/analyses/w32allapleb.html; reference:url,isc.sans.org/diary.html?storyid=2451; classtype:trojan-activity; sid:2003292; rev:7; metadata:created_at 2010_07_30, signature_severity Informational, updated_at 2019_07_26;)