ET EXPLOIT Apache log4j RCE Attempt - Nested upper (udp) (CVE-2021-44228)

Query · suricata

content:"|24 7b 24 7b|upper|3a 24 7b|upper|3a|jndi"; fast_pattern;
Raw source ET EXPLOIT Apache log4j RCE Attempt - Nested upper (udp) (CVE-2021-44228) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Apache log4j RCE Attempt - Nested upper (udp) (CVE-2021-44228)";
    content:"|24 7b 24 7b|upper|3a 24 7b|upper|3a|jndi"; fast_pattern;
    reference:cve,2021-44228;
    classtype:attempted-admin;
    sid:2034709; rev:1;
    metadata:attack_target Server, created_at 2021_12_14, cve CVE_2021_44228, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2021_12_14, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.