alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Possible vBulletin object injection vulnerability Attempt"; flow:established,to_server; http.uri; content:"/api/hook/decodeArguments"; nocase; content:"arguments="; nocase; content:"|7b|"; distance:0; content:"|3a|"; distance:0; content:"|3b|"; distance:0; content:"free_result"; nocase; distance:0; reference:url,blog.sucuri.net/2015/11/vbulletin-exploits-in-the-wild.html; classtype:attempted-admin; sid:2022039; rev:3; metadata:created_at 2015_11_05, confidence Medium, signature_severity Major, updated_at 2020_06_09;)