alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kimsuky Related Maldoc Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?who="; fast_pattern; content:"&secure="; distance:0; content:"&v="; distance:0; content:".exe|20|"; distance:0; http.user_agent; bsize:57; content:"Mozilla/4.0|20|(compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,mp.weixin.qq.com/s/og8mfnqoKZsHlOJdIDKYgQ; reference:md5,5b2355014f72dc2714dc5a5f04fe9519; classtype:trojan-activity; sid:2033595; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_07_28, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)