alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Silverfox Payload Retrieval Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:6; content:"/wz-12"; fast_pattern; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; reference:url,bbs.kanxue.com/thread-281533.htm; reference:md5,07b0577363ee95f35a86913dcbfa0904; classtype:trojan-activity; sid:2053279; rev:1; metadata:created_at 2024_06_06, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_06;)