alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Gootkit Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/search.php?"; startswith; fast_pattern; pcre:"/^[1-z]{13}=[0-9]{16}$/R"; http.user_agent; content:"Mozilla/4.0|20 28|compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5|29|"; http.header_names; content:!"Referer"; reference:md5,82ddc740b8ff3aa4d818d1b421e0231e; classtype:trojan-activity; sid:2033022; rev:3; metadata:created_at 2021_05_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_17;)