alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Suspected Proxy Server List Retrieval (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/TheSpeedX/PROXY-List/blob/master/"; startswith; fast_pattern; content:".txt"; endswith; http.host; content:"github.com"; reference:url,github.com/TheSpeedX/PROXY-List/blob/master/http.txt; classtype:misc-activity; sid:2051003; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSEncrypt, created_at 2024_02_21, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_21; target:src_ip;)