alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING [TW] Robin Banks HTTP GET Struct"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?token="; content:"&step="; distance:0; content:"&a_failed="; distance:1; within:10; fast_pattern; pcre:"/&a_failed=[01]$/"; threshold:type limit,count 1,seconds 30,track by_src; classtype:social-engineering; sid:2037866; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_07_29, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_29;)