alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE linux.backdoor.wordpressexploit file upload test"; flow:established,to_server; http.uri; content:"/?action=um_fileupload&domain=test&name=test"; reference:url,vms.drweb.com/virus/?i=25604695; reference:url,vms.drweb.com/virus/?i=25604745; classtype:trojan-activity; sid:2043197; rev:1; metadata:affected_product Wordpress, affected_product Wordpress_Plugins, attack_target Client_Endpoint, created_at 2023_01_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_03;)