alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT SNET EK Activity Nov 27 2013"; flow:established,to_server; content:"?src="; content:"request|3a 20|microsoft_update|0d 0a|"; pcre:"/^[^\s]*?\s*?\/[^\r\n\s]*?\?src=/i"; classtype:exploit-kit; sid:2017786; rev:2; metadata:created_at 2013_11_28, confidence High, signature_severity Major, updated_at 2019_07_26;)