alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET MALWARE Night Dragon Server Auth to Bot"; flow:established,from_server; dsize:29; content:"|00 00|password|00 00 00|"; offset:3; depth:13; reference:url,www.mcafee.com/us/resources/white-papers/wp-global-energy-cyberattacks-Night-dragon.pdf; classtype:trojan-activity; sid:2012309; rev:1; metadata:created_at 2011_02_11, signature_severity Major, updated_at 2019_07_26;)