alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Injector.DKUN Variant Response"; flow:to_client,established; content:"|0d 0a|Server|3a|nginx"; fast_pattern; http.header; content:"Server|3a 20|"; http.response_line; content:"HTTP/1.1 200"; startswith; reference:md5,9fbc3f503f51bd523f802152fdf438df; classtype:trojan-activity; sid:2012707; rev:10; metadata:attack_target Client_Endpoint, created_at 2011_04_22, deployment Perimeter, malware_family Win32_Injector_DKUN, signature_severity Major, updated_at 2022_09_13;)