The hackers are at it again. Microsoft Corp. has issued an emergency security warning saying that hackers have found a way to booby-trap certain common Word files with the .rtf extension (RTF stands for rich text format), according to Business Insider. Microsoft is aware of the attack and is in the process of stopping the bug.
A booby-trapped file is the worst kind of attack and a hacker who manages to get you to open such a file can gain control of your computer. The best way to be sure your computer won’t get infected is not to open a document with the .rtf file extension until Microsoft gives the go-ahead.
Microsoft is recommending that you block all .rtf documents from your computer and they’ve released a free tool that will set that up for you. While .rtf files are not the default for Microsoft Word — the default is .docx or .doc — this is not a strange or unusual type of document.
A good rule of thumb: don’t open emails from people you don’t know and never download or click on the attachments and links in those emails. If you think you could be at risk, run a virus scan immediately and utilize Microsoft’s free .rtf blocking tool.
Original post can be viewed here.