alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SERVER SLIGHTPULSE WebShell Access Inbound M2"; flow:established,to_server; http.method; content:"POST"; http.header; content:"HTTP_X_KEY|3a 20|zzdibweoQxffnDEi2UKacJlEekplJ7uwrt|0d|"; fast_pattern; http.header_names; content:"|0d 0a|HTTP_X_CNT|0d 0a|"; content:"|0d 0a|HTTP_X_CMD|0d 0a|"; classtype:attempted-admin; sid:2033789; rev:2; metadata:created_at 2021_08_25, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_21;)