Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OSX/OceanLotus.D Requesting Commands from CnC"; flow:established,to_server; threshold:type limit, count 1, seconds 30, track by_src; http.method; content:"GET"; http.uri; content:".css"; endswith; http.user_agent; content:"curl/"; http.cookie; content:"m_pixel_ratio="; fast_pattern; depth:14; pcre:"/^[a-f0-9]{32}\x3b$/R"; http.header_names; content:"Host|0d 0a|User-Agent|0d 0a|Accept|0d 0a|"; content:!"Referer"; content:!"Cache"; content:!"Accept-"; reference:md5,306d3ed0a7c899b5ef9d0e3c91f05193; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/new-macos-backdoor-linked-to-oceanlotus-found/; classtype:command-and-control; sid:2025465; rev:4; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2018_04_05, deployment Perimeter, malware_family OSX_OceanLotus_D, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_04;)