alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA408 Related Activity (GET)"; flow:established,to_server; http.request_line; content:"GET /?query=5 HTTP/1.1"; fast_pattern; http.header_names; content:"|0d 0a|Accept|0d 0a|Accept-Language|0d 0a|Accept-Encoding|0d 0a|"; startswith; content:!"Referer"; reference:url,twitter.com/AhnLab_SecuInfo/status/1460101266760089600; reference:md5,e521c68ac280c00b0e27cbd2fed4c9c4; classtype:trojan-activity; sid:2034511; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_18, deployment Perimeter, malware_family Kimsuky, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_18;)