alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Artro Downloader User-Agent Detected"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0 (Windows NT 6.1|3b 20|wget 3.0|3b 20|rv|3a|5.0) Gecko/20100101 Firefox/5.0"; startswith; fast_pattern; reference:url,www.securelist.com/en/analysis/204792172/The_Advertising_Botnet; classtype:pup-activity; sid:2013184; rev:10; metadata:created_at 2011_07_04, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)