alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP [eSentire] Win32/Adware.Adposhel.lgvk CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/inst?data="; nocase; http.user_agent; content:"Installer event sender/"; depth:23; fast_pattern; isdataat:!3,relative; http.header_names; content:!"Accept"; content:!"Referer"; reference:md5,e7c2c1b796dad6210165110b7e8cda7d; classtype:pup-activity; sid:2025645; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_07_10, deployment Perimeter, malware_family Adposhel, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_31;)