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;)