Microsoft Warns Of E-mails With Attachments JavaScript

Microsoft has issued a warning to spam messages that contain a JavaScript file attached and try to infect your computer with malware, including Locky-ransomware. The JavaScript attachments are back wrapped in a rar or zip file, says Alden Pornasdoro Microsoft.

In addition to use JavaScript files cyber criminals also Office documents with malicious macros to spread ransomware. According to Microsoft can be rapidly infected a computer via a JavaScript file. "It is interesting to note that an Office attachment with malicious macros usually two or more clicks required to open the document. One click for the document, and another click to activate the macro. On the other hand, the JavaScript annex just one or two clicks to run, "Pornasdoro notes.

He adds that it is very unusual for people to send JavaScript files attached. Who receives such a file must therefore not open. Pornasdoro also advises organizations to enable AppLocker so dubious software can not be performed. In addition, administrators are advised to disable macros in Office programs.

Finland's F-Secure has advice given how the Windows Script Host can be disabled so that JavaScript files are no longer open.

E-mail Resumes And Internship Requests Infects Tills

Researchers have discovered a new variant of checkout malware that spreads via e-mail. The emails focus on companies and have different topics ranging from training requests and resumes, to ask if there are job vacancies. Attached is added to the e-mail a Word document. This document states that it is a secure document and the user macros must turn to see the content.

Once macros are enabled, the document will download the malware. This malware additional malware can be downloaded and installed. Through the malware that is first the attackers can determine what malware is then to be actively installed. It is then possible to install malware that targets POS systems that run on Windows. Several retail chains, especially in the US, using payment terminals that are connected to a Windows computer.

Once the computer is infected, the malware can intercept the data of credit cards and collect processed through the POS system. With the stolen payment card data can then be fraudulent. According to security firm FireEye shows that even attack cyber criminals engaged in random spam operations include cash and malware that can be used to infect some of their victims.