alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CloudAtlas APT Related Maldoc Activity M3 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?php-"; startswith; fast_pattern; content:!"|2e|"; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,efd493e8ebcd66f9404338532519eb90; reference:md5,f611cb1a320a9d3b5df4b70b37b0fd73; reference:url,www.facct.ru/blog/cloud-atlas; classtype:trojan-activity; sid:2049733; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_12_19, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_27; target:src_ip;)