alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Exploit kit attack activity likely hostile"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/oH"; fast_pattern; pcre:"/\/[a-z0-9]+\.[a-z0-9]{2,4}\/oH[a-z0-9]{60,}$/i"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; nocase; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan%3AWin32%2FHiloti.gen%21D; classtype:exploit-kit; sid:2011104; rev:11; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_02_13;)