Wildfire spreads through well-crafted spam e-mails. A typical spam e-mail mentions that a transport company failed to deliver a package. In order to schedule a new delivery the receiver is asked to make a new appointment, for which a form has to be filled in, which has to be downloaded from the website of the transport company.
Three things stand out here. First, the attackers registered a Dutch domain name, something we do not see very often. Second, the e-mail is written in flawless Dutch. And thirdly, they actually put the address of the targeted company in the e-mail. This is something we do not see very often and makes it for the average user difficult to see that this is not a benign e-mail.