alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Trojan.Agent.FSTT CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?company_id="; depth:25; fast_pattern; content:"&lua="; distance:0; http.user_agent; content:"Installed"; startswith; http.header_names; content:!"Referer"; reference:md5,f1c404760bfac3c952d0f10dfa21e659; classtype:trojan-activity; sid:2035098; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_04, deployment Perimeter, malware_family Win32_Trojan_Agent_FSTT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_14;)