alert tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Possible JNBridge Java Deserialization Attempt M1"; flow:established,to_server; content:"JNB"; startswith; pcre:"/^\d[012345]/R"; content:"runCommand"; fast_pattern; classtype:attempted-admin; sid:2033851; rev:1; metadata:attack_target Server, created_at 2021_08_31, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2021_08_31, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)