alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP APN/Ask Toolbar PUA/PUP User-Agent"; flow:established,to_server; http.user_agent; content:"TBNotifier"; depth:10; fast_pattern; endswith; classtype:pup-activity; sid:2025400; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_02_27, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;)