alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT WebDAV Retrieving an .url"; flow:established,to_client; xbits:isset, ET.PROPFIND,track ip_dst; http.stat_code; content:"200"; http.content_type; bsize:22; content:"application/x-mswinurl"; file.data; content:"[InternetShortcut]"; content:"URL=file://"; distance:0; fast_pattern; classtype:misc-activity; sid:2049315; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_27, deployment Perimeter, deployment SSLDecrypt, confidence Low, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_27, reviewed_at 2024_10_14;)