alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT SNET EK Downloading Payload"; flow:established,to_server; http.uri; content:"get"; content:"?src="; fast_pattern; distance:0; content:"snet"; endswith; pcre:"/\?src=[a-z]+snet$/"; http.user_agent; content:" WinHttp.WinHttpRequest"; classtype:exploit-kit; sid:2016566; rev:5; metadata:created_at 2013_03_14, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_18;)