alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE WooSIP Downloader CnC CreateFolderOnServer"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/process_ad.php?sDir="; nocase; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,1cd356ab1943f120b04ad21afd9dcdb3; classtype:command-and-control; sid:2025165; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_12_21, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_24;)