alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/Sogou.H Variant Request"; flow:established,to_server; http.request_line; content:"GET /appinfo?num="; startswith; fast_pattern; pcre:"/^\d+\sHTTP/1.1$/R"; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:22; http.user_agent; content:"HttpDownload"; bsize:12; reference:md5,29db559062d82a56c53c70c68dc160ec; classtype:pup-activity; sid:2031191; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_11_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_09;)