Rule History

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|upper|3a|j"; nocase; fast_pattern; content:"n"; distance:0; within:12; content:"d"; distance:0; within:12; content:"i"; distance:0; within:12; reference:cve,2021-44228; classtype:attempted-admin; sid:2034811; rev:1; metadata:created_at 2021_12_20, cve CVE_2021_44228, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_20;)