#Filemail as .exe
#Filemail as install

If you need to send large files to someone via email, consider using a service such as Dropbox or WeTransfer instead. You’ll find a good list of compressed file formats here. Unless you’re absolutely sure that someone has sent you a compressed file for a legitimate reason, don’t touch any attachment with a. The problem with compressed file types is that they disguise what’s actually in the package, such as dangerous. They will almost certainly contain malware.Ĭompressed files are one of the hardest types of malware to deal with, because there’s a good reason why someone might send you a compressed file via email - to reduce the size of the attachment. But, again, if you see them in an unsolicited email, or even from someone you know, give them a wide berth.

#Filemail as .exe

exe files over the internet when installing legitimate software. files - are one of the most common types of malware.

There’s no good reason anyone should send you an ISO file by email, so if you see this type of attachment, bin it immediately.Įxecutables - or.

Windows 10 can now ‘mount’ ISO files without any extra software, which has made this means of attack much more popular over the past couple of years. However, they can also be used to distribute malware. They’re often used to distribute operating systems, such as Windows. ISO files are generally used to create a copy of everything on a physical disc. Emails like this should be deleted straight away.

#Filemail as install

It will almost certainly include a dangerous payload that will try and install something nasty on your machine. r09 - a compressed file type commonly used by the WinRAR software. In this instance, the file extension was. Whatever you do, do not click on the attachment. However, if you hover the mouse over the attachment in most email software or webmail (such as Gmail) the full name of the file will be revealed, including the file extension at the end. The fraudsters often use long attachment filenames so that you can’t see the letters at the end, known as file extensions. However, it’s not the three letters at the start of a filename that you should be concerned with - it’s the three or four letters at the end, after the dot.