ET EXPLOIT Apache Obfuscated log4j RCE Attempt (tcp ldap) (CVE-2021-44228)

Query · suricata

flow:established,to_server;
content:"|24 7b 24 7b|env|3a|NaN|3a|-j|7d|ndi|24 7b|env|3a|NaN|3a|"; nocase; fast_pattern;
content:"|24 7b|env|3a|NaN|3a|-l|7d|dap|24|";
Raw source ET EXPLOIT Apache Obfuscated log4j RCE Attempt (tcp ldap) (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 tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Apache Obfuscated log4j RCE Attempt (tcp ldap) (CVE-2021-44228)";
    flow:established,to_server;
    content:"|24 7b 24 7b|env|3a|NaN|3a|-j|7d|ndi|24 7b|env|3a|NaN|3a|"; nocase; fast_pattern;
    content:"|24 7b|env|3a|NaN|3a|-l|7d|dap|24|";
    reference:url,twitter.com/bad_packets/status/1471253695459332102;
    reference:cve,2021-44228;
    classtype:attempted-admin;
    sid:2034755; rev:1;
    metadata:attack_target Server, created_at 2021_12_17, cve CVE_2021_44228, deployment Perimeter, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_17, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;
)

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