alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Kimsuky Related Exfil"; flow:established,to_server; urilen:25; http.method; content:"POST"; http.uri; content:"/scriptPhpServer.php"; fast_pattern; isdataat:!1,relative; http.user_agent; content:"Mozilla|2f|4|2e|0|20|(compatible|3b 20|Win32|3b 20|WinHttp|2e|WinHttpRequest|2e|5)"; reference:url,www.virusbulletin.com/uploads/pdf/conference_slides/2019/VB2019-Kim.pdf; classtype:command-and-control; sid:2029451; rev:2; 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 Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_14;)