alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User Agent (BlackSun)"; flow:to_server,established; http.user_agent; content:"BlackSun"; nocase; depth:8; reference:url,www.bitdefender.com/VIRUS-1000328-en--Trojan.Pws.Wow.NCY.html; classtype:trojan-activity; sid:2008983; rev:8; metadata:created_at 2010_07_30, confidence High, signature_severity Major, updated_at 2020_10_13;)