alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Possible Outdated Browser Landing Page M1"; flow:established,to_client; http.stat_code; content:"200"; file.data; content:"Your browser is"; nocase; fast_pattern; content:"work well in"; nocase; distance:0; content:"your browser to view this"; nocase; distance:0; reference:url,blog.group-ib.com/perswaysion; classtype:misc-activity; sid:2033996; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_21, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_22;)