alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Platinum APT - Titanium Payload CnC Checkin (x86)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"confirm.gif?f=1"; endswith; fast_pattern; reference:url,securelist.com/titanium-the-platinum-group-strikes-again/94961/; classtype:command-and-control; sid:2028957; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_11_11, deployment Perimeter, malware_family Titanium, performance_impact Low, confidence High, signature_severity Major, tag PLATINUM, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_11_11;)