alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Windows executable base64 encoded"; flow:established,from_server; file_data; content:"TVqQA"; pcre:"/^[A-Za-z0-9]{3}(?:[A-Za-z0-9+/]{4}|\s){100}/Rs"; pcre:"/[^A-Za-z0-9+/]TVqQA/"; reference:md5,49aca228674651cba776be727bdb7e60; classtype:trojan-activity; sid:2018856; rev:12; metadata:created_at 2014_07_31, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_19;)