alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE VBS.ARS Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?os=windows"; nocase; fast_pattern; content:"&user="; distance:0; content:"&av="; distance:0; content:"&fw="; distance:0; content:"&hwid="; distance:0; content:"&x="; distance:0; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,twitter.com/B_H101/status/954984729329184768; classtype:command-and-control; sid:2025230; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_22, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_04_20;)