alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Genexis PLATINUM 4410 Command Injection Inbound (CVE-2021-29003)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/sys_config_valid.xgi?exeshell="; fast_pattern; pcre:"/^(?:\x3b|\x0a|\x26|\x60|\x7C|\x24)/R"; reference:cve,2021-29003; classtype:attempted-admin; sid:2033758; rev:1; metadata:attack_target Server, created_at 2021_08_22, cve CVE_2021_29003, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2021_08_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)