alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Arechclient2 Backdoor/SecTopRAT Related Activity M2 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/wbinjget?q="; startswith; fast_pattern; pcre:"/^[0-9A-F]{32}$/R"; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Referer|0d 0a|"; reference:md5,a2c80aed8f6721a1e4bd66dded415eab; classtype:trojan-activity; sid:2052248; rev:1; metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2024_04_23, deployment Perimeter, malware_family Arechclient2, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_24; target:src_ip;)