alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kaiten User Agent"; flow:established,to_server; http.method; content:"GET"; http.user_agent; content:"HackZilla/"; nocase; fast_pattern; http.header_names; content:!"Referer"; reference:url,github.com/search?q=repo%3Aisdrupter%2Fziggystartux+hackzilla&type=code; classtype:trojan-activity; sid:2046861; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_07_19, deployment Perimeter, malware_family Kaiten, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_19;)