A malware called Emotet has network sniffing capability. It is known to be a banking malware which steals online banking credentials according to security researchers. It was first spotted by security vendors at Trend Micro. As per Trend Micro, through network sniffing it can capture the data sent over secured HTTPS connections. Hackers distributed Emotet malware through spam mails, containing a link to a website hosting the malware or a PDF document icon that is actually the malware. It is difficult for mail servers to filter the span emails containing this malware because messages actually originates from legitimate mail ids. It is better for users to pay more caution while dealing with mails which look suspicious or from unknown sources/email-ids.