ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol (upper UDP Bypass) (CVE-2021-44228)

Query · suricata

content:"|24 7b|jndi|3a|"; nocase; fast_pattern;
content:"|24 7b|upper|3a|"; distance:0;
Raw source ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol (upper UDP Bypass) (CVE-2021-44228) · Suricata
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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 HUNTING Possible Apache log4j RCE Attempt - Any Protocol (upper UDP Bypass) (CVE-2021-44228)";
    content:"|24 7b|jndi|3a|"; nocase; fast_pattern;
    content:"|24 7b|upper|3a|"; distance:0;
    reference:cve,2021-44228;
    classtype:misc-activity;
    sid:2034664; rev:1;
    metadata:created_at 2021_12_11, cve CVE_2021_44228, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_16;
)

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