alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Fake Windows Scam ScreenLocker"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/lock.php"; endswith; http.user_agent; bsize:7; content:"MyAgent"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,6443d8351f5ed62836003f103d8de20e; classtype:social-engineering; sid:2024417; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_06_20, deployment Perimeter, malware_family Screenlocker, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_04_29;)