alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE GoldenSpy CnC Activity"; flow:established,to_server; http.request_line; content:"POST /data/receive "; depth:19; fast_pattern; http.request_body; content:"ectid="; depth:6; content:"&taxCode="; distance:0; http.host; content:!"i-xinnuo.com"; endswith; reference:md5,be1a7bbc42d5d6f3a3270201906a68d9; reference:url,www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/the-golden-tax-department-and-the-emergence-of-goldenspy-malware/; classtype:command-and-control; sid:2030394; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_25, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_02_17;)