alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/Adware.YoutubeDownloaderGuru.A Variant CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/php/update.php?m="; startswith; fast_pattern; content:"&s="; within:8; isdataat:!6,relative; http.user_agent; bsize:24; content:"Youtube Music Downloader"; http.header_names; bsize:37; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; reference:md5,638aad567ad2f0fc1a3e223eea6fa9a4; classtype:pup-activity; sid:2029545; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_27, deployment Perimeter, confidence High, signature_severity Minor, updated_at 2020_02_27;)