alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Throwback Server Response (Incoming)"; flow:established,to_client; http.stat_code; content:"200"; file.data; content:"<title>404 Not Found</title>"; content:"<h1>Not Found</h1>"; distance:0; content:"<hidden stup1fy|20|"; distance:0; fast_pattern; reference:url,github.com/silentbreaksec/Throwback; classtype:trojan-activity; sid:2036591; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_05_12, deployment Perimeter, malware_family Throwback, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_12;)