alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Kimsuky Related Actvity (GET)"; flow:established,to_server; http.method; content:"GET"; http.request_line; content:".php?query=50 HTTP/1.1"; endswith; fast_pattern; http.header_names; content:"|0d 0a|UA-CPU|0d 0a|"; content:!"Referer|0d 0a|"; http.user_agent; content:!"Linux"; reference:md5,002fd493096214a9a44d82acb7f1ac30; reference:url,twitter.com/h2jazi/status/1658133904618934272; classtype:trojan-activity; sid:2045806; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_05_22, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03, reviewed_at 2024_03_11; target:src_ip;)