alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Zendran ELF IRCBot Server Banner"; dsize:>14; flow:established,from_server; content:"|3a|Hell.Network|0d 0a|"; depth:15; reference:url,blog.malwaremustdie.org/2014/05/threat-analysis-zendran-elf-ddos-scheme.html; reference:url,capsop.com/lightaidra-cc-investigation/; classtype:trojan-activity; sid:2018484; rev:2; metadata:created_at 2014_05_19, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)