alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT SPL2 EK Post-Compromise Data Dump M1"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"QWRtaW5SaWdodHMy"; fast_pattern; pcre:"/(?:Byb2NMaXN0|Qcm9jTGlzd|UHJvY0xpc3)/"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:exploit-kit; sid:2020903; rev:4; metadata:created_at 2015_04_14, confidence High, signature_severity Major, updated_at 2024_04_27;)