alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kimsuky Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/report.php?key="; startswith; fast_pattern; http.host; content:"kr2959.atwebpages.com"; http.header_names; content:!"Referer"; reference:md5,72d43ff8f9ee0819e96ed7fd7d9a551a; reference:url,mp.weixin.qq.com/s/og8mfnqoKZsHlOJdIDKYgQ; classtype:trojan-activity; sid:2033591; rev:1; 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 2021_07_28;)