alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MacOS/UpdateAgent.A CnC Activity M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/service?uuid="; depth:20; fast_pattern; pcre:"/^\/[a-z0-9]{1,3}\/service\?uuid=[A-Z0-9]{8}\-[A-Z0-9]{4}\-[A-Z0-9]{4}\-[A-Z0-9]{4}\-[A-Z0-9]{12}$/U"; http.user_agent; content:"curl"; startswith; http.header_names; content:!"Referer"; reference:md5,5dc4e1b8610aacc5941ccf68f823f366; reference:url,microsoft.com/security/blog/2022/02/02/the-evolution-of-a-mac-trojan-updateagents-progression; classtype:trojan-activity; sid:2035086; rev:2; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2022_02_03, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_03, reviewed_at 2024_06_26;)