alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Possible Oracle Access Manager RCE Attempt (CVE-2021-35587)"; flow:established,to_server; http.request_line; content:"POST /oam/server/opensso/sessionservice HTTP/1.1"; fast_pattern; http.request_body; content:"svcid"; content:"|5b|CDATA"; content:"requester|3d|"; distance:0; nocase; reference:cve,2021-35587; classtype:attempted-admin; sid:2035429; rev:2; metadata:attack_target Server, created_at 2022_03_10, cve CVE_2021_35587, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2022_03_10, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)