alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/Adware.Agent.NPP CnC Activity"; flow:established,to_server; http.request_line; bsize:27; content:"GET /show/push.txt HTTP/1.0"; fast_pattern; http.user_agent; bsize:20; content:"NSISDL/1.2 (Mozilla)"; reference:md5,0bec370f25d557e6dd64d2e9391f23f4; classtype:pup-activity; sid:2029350; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_04, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2020_02_04;)