alert tcp $EXTERNAL_NET any -> $SMTP_SERVERS [25,587] (msg:"ET MALWARE .gadget Email Attachment - Possible Upatre"; flow:established,to_server; content:"Content-Type|3a| application/zip|3b|"; nocase; content:".gadget|22|"; distance:7; within:30; nocase; pcre:"/name=\x22[a-z0-9\-_\.\s]{0,25}\.gadget\x22/i"; reference:url,pastebin.com/5eNDazpL; classtype:trojan-activity; sid:2018490; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2014_05_21, malware_family Upatre, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Downloader, tag Upatre, updated_at 2019_07_26;)