ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol TCP (CVE-2021-44228)

Query · suricata

flow:established,to_server;
content:"|24 7b|jndi|3a|"; nocase; fast_pattern;
content:"|3a 2f 2f|"; distance:0; within:20;
Raw source ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol TCP (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 tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol TCP (CVE-2021-44228)";
    flow:established,to_server;
    content:"|24 7b|jndi|3a|"; nocase; fast_pattern;
    content:"|3a 2f 2f|"; distance:0; within:20;
    reference:cve,2021-44228;
    classtype:misc-activity;
    sid:2034661; 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 2021_12_11;
)

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.