alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/Atshz.A Checkin M2"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"updata.php?t=f&m="; fast_pattern; http.user_agent; content:"MSIE 5.01"; http.header_names; content:!"Referer|0d 0a|"; reference:md5,e7b8bb0f99c7f6428dbac35c01fcdd9b; classtype:pup-activity; sid:2043009; rev:4; 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 2830631;)