alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Rejetto HTTP File Sever Response"; flow:established,to_client; http.stat_code; content:"200"; http.server; content:"HFS"; startswith; http.cookie; content:"HFS_SID"; fast_pattern; startswith; reference:url,www.rejetto.com/hfs/; classtype:trojan-activity; sid:2045860; rev:1; metadata:affected_product HTTP_Server, attack_target Client_and_Server, created_at 2023_05_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_24; target:src_ip;)