alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious Terse HTTP Request to textbin"; flow:established,to_server; http.request_line; content:"GET /raw/"; startswith; http.host; content:"textbin.net"; bsize:11; fast_pattern; http.header_names; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22; classtype:bad-unknown; sid:2034461; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_15, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_15;)