Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kimsuky Related CnC"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?WORD=com_"; fast_pattern; pcre:"/^[0-9A-F]{12,16}/R"; content:"&NOTE="; within:6; pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R"; reference:url,www.virusbulletin.com/uploads/pdf/conference_slides/2019/VB2019-Kim.pdf; reference:md5,19f24aec5c1017d162e78863cff316fa; classtype:command-and-control; sid:2029453; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_14, deployment Perimeter, malware_family Kimsuky, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_20;)