alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible KONNI CnC Activity"; flow:established,to_server; http.method; content:"POST"; nocase; http.user_agent; bsize:4; content:"HTTP"; fast_pattern; http.host; content:!".realptt.com"; reference:url,us-cert.cisa.gov/ncas/alerts/aa20-227a; classtype:targeted-activity; sid:2030691; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_08_17, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)