alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET ADWARE_PUP Win32/Atshz.A Checkin";
flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:"data.php?t=l&m=0"; fast_pattern; endswith;
http.user_agent;
content:"MSIE 5.01";
http.header_names;
content:!"Referer|0d 0a|";
reference:md5,e7b8bb0f99c7f6428dbac35c01fcdd9b;
classtype:pup-activity;
sid:2043008; rev:5;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_05_01, deployment Perimeter, confidence High, signature_severity Minor, updated_at 2022_12_27, former_sid 2830630;
)