alert http $HTTP_SERVERS any -> $EXTERNAL_NET any (msg:"ET WEB_SERVER Generic Webshell Accessed on Internal Server"; flow:established,to_client; file.data; content:"<title>anaLTEAM"; nocase; fast_pattern; content:"name=|22|command|22 20|value=|22|Crotz|22|"; nocase; distance:0; content:"value=|22|Upload Bos"; nocase; distance:0; classtype:web-application-attack; sid:2030319; rev:2; metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_06_12, deployment Perimeter, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_12;)