alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE APT-Q-37/Manling Flower Payload - CnC Checkin";
flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"|00 3a 00 5c 00 57 00 69 00 6e 00 64 00 6f 00 77 00 73 00 5c 00|"; fast_pattern;
content:"|74 00 78 00 74 00 7c 00 7c 00 0d|";
content:"|2d 2d 00|"; endswith;
reference:url,mp.weixin.qq.com/s/8j_rHA7gdMxY1_X8alj8Zg;
classtype:command-and-control;
sid:2036935; rev:1;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_09, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_09;
)