alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/WindowsDefender Bypass Download Request"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"/kill.bat"; bsize:9; fast_pattern; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/W"; http.connection; content:"Keep-Alive"; nocase; reference:md5,a59277f422139a3c2341eee166eda629; classtype:trojan-activity; sid:2035696; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_01, deployment Perimeter, deprecation_reason Age, malware_family Win32_WindowsDefender, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_02, reviewed_at 2024_12_02;)