alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Operation Tripoli Related CnC Checkin"; flow:established,to_server; http.user_agent; content:"30909D51946D672A48B1729580088C4F"; startswith; fast_pattern; endswith; reference:url,research.checkpoint.com/operation-tripoli/; classtype:command-and-control; sid:2027661; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_07_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)