alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CrownAdPro CnC Activity M3"; flow:established,to_server; urilen:13; http.method; content:"GET"; http.uri; content:"/ixptexts.php"; fast_pattern; http.header_names; content:"|0d 0a|Host|0d 0a|Accept|0d 0a 0d 0a|"; bsize:18; reference:url,twitter.com/ViriBack/status/1204883534764077057; reference:md5,514d11884ed88780710f5a84bbb523c7; classtype:command-and-control; sid:2029286; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_16, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_01_16;)