alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Latrodectus Alive Request (GET)"; flow:established,to_server; flowbits:set,ET.Latrodectus.alive; flowbits:noalert; urilen:10; http.method; content:"GET"; http.uri; content:"/alive.php"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:trojan-activity; sid:2049231; rev:3; metadata:attack_target Client_Endpoint, created_at 2023_11_15, deployment Perimeter, malware_family Latrodectus, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_04_27, reviewed_at 2024_04_15; target:src_ip;)