alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CloudAtlas APT Related Maldoc Activity M7 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?wp-content"; startswith; fast_pattern; content:".css?ver="; distance:0; content:"time="; distance:0; content:"/"; within:11; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; content:!"Referer"; reference:md5,b1995d8a9df9bd8ce23d38b0ab454580; reference:url,www.facct.ru/blog/cloud-atlas; classtype:trojan-activity; sid:2049798; 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;)