alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CloudAtlas APT Related Maldoc Activity M2 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?php-"; startswith; fast_pattern; content:"wp-content"; within:15; pcre:"/^(?:(\/|_))plugins\//R"; content:".css"; pcre:"/^(?:(\/|\?))/R"; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; content:!"Referer"; reference:md5,965d5dc42ee1efdcbc52d061624526c7; reference:url,www.facct.ru/blog/cloud-atlas; classtype:trojan-activity; sid:2049797; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_12_20, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_20; target:src_ip;)