alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET EXPLOIT Joomla RCE M2 (Serialized PHP in UA)"; flow:established,to_server; http.user_agent; content:"O|3a|"; fast_pattern; pcre:"/^\d+\x3a[^\r\n]*?\{[^\r\n]*?\}/R"; reference:url,blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.html; classtype:web-application-attack; sid:2022263; rev:5; metadata:created_at 2015_12_15, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_11;)