ET EXPLOIT NextGen Mirth Connect <4.4.1 RCE Attempt (CVE-2023-43208)

alert http $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT NextGen Mirth Connect <4.4.1 RCE Attempt (CVE-2023-43208)";
    flow:established,to_server;
    urilen:10;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/users";
    http.content_type;
    content:"application/xml"; nocase;
    http.request_body;
    content:"|20 20 3c|string|3e|"; startswith;
    content:"|3c|iMethodName|3e|getMethod|3c 2f|iMethodName|3e|";
    content:"|3c|string|3e|getRuntime|3c 2f|string|3e|";
    content:"|3c|iMethodName|3e|invoke|3c 2f|iMethodName|3e 0d 0a|"; fast_pattern;
    reference:cve,2023-43208;
    reference:url,horizon3.ai/attack-research/attack-blogs/writeup-for-cve-2023-43208-nextgen-mirth-connect-pre-auth-rce/;
    classtype:attempted-admin;
    sid:2053410; rev:1;
    metadata:attack_target Server, created_at 2024_06_10, cve CVE_2023_43208, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2024_06_10, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)