alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Backdoor.Daxin CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/index.php?htpmgcid="; startswith; fast_pattern; http.header_names; content:"Content-Type|0d 0a|Host|0d 0a|Content-Length|0d 0a|"; content:!"Referer"; reference:md5,fb7c61ef427f9b2fdff3574ee6b1819b; reference:url,symantec-enterprise-blogs.security.com/blogs/threat-intelligence/daxin-backdoor-espionage; classtype:command-and-control; sid:2035365; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_01, deployment Perimeter, malware_family Win32_Backdoor_Daxin, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_01, reviewed_at 2024_06_26;)