alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible GoBruteforcer Payload Retrieval Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/.x/"; pcre:"/^(?:64|32|arm)/R"; content:"/cache_init"; fast_pattern; endswith; reference:url,unit42.paloaltonetworks.com/gobruteforcer-golang-botnet/; classtype:trojan-activity; sid:2044632; rev:1; metadata:affected_product Linux, attack_target Linux_Unix, created_at 2023_03_15, deployment Perimeter, performance_impact Low, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_15;)