alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED GCleaner CnC Checkin M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2f|dll|2e|php"; bsize:8; fast_pattern; http.header_names; content:"Accept|0d 0a|Accept-Language|0d 0a|Accept-Charset|0d 0a|Accept-Encoding|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a|Cache-Control|0d 0a|"; http.user_agent; content:"B"; bsize:1; reference:url,tria.ge/230130-trm29acf8w; classtype:trojan-activity; sid:2044033; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_01_31, deployment Perimeter, former_category MALWARE, malware_family GCleaner, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30, reviewed_at 2024_09_30;)