alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible PikaBot Java Loader CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; pcre:"/^\/[A-Za-z0-9]{4,6}\/\d{6}$/"; http.user_agent; content:"Java/"; startswith; fast_pattern; http.accept; content:"text|2f|html|2c 20|image|2f|gif|2c 20|image|2f|jpeg|2c 20 2a 3b 20|q|3d 2e|2|2c 20 2a 2f 2a 3b 20|q|3d 2e|2"; http.connection; content:"keep-alive"; reference:md5,b5daa41dcb91138f2066513aa12fb9f3; classtype:trojan-activity; sid:2050875; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, created_at 2024_02_14, deployment Perimeter, performance_impact Moderate, confidence Low, signature_severity Major, updated_at 2024_02_14; target:src_ip;)