alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP NBP Mac PUP User-Agent Observed"; flow:established,to_server; http.user_agent; content:"nbp|20 28|unknown|20|version|29 20|CFNetwork|2f|"; startswith; reference:url,macsecurity.net/view/592-nbp-will-damage-your-computer-mac-virus; classtype:trojan-activity; sid:2050542; rev:1; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2024_01_29, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_29;)