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:"/?query=5"; bsize:9; fast_pattern; http.header_names; content:"|0d 0a|Accept|0d 0a|Accept-Language|0d 0a|UA-CPU|0d 0a|Accept-Encoding|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:84; reference:md5,b567f7aac1574b2ba3a769702d2f6a1e; reference:md5,815c690bfc097b82a8f1d171cd00e775; reference:url,twitter.com/Timele9527/status/1407610627011403779; classtype:trojan-activity; sid:2033192; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_06_25, deployment Perimeter, malware_family Kimsuky, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_25;)