Computer hackers are returning to techniques that were widespread in the early days of cyber crime according to security firm Websense. It means that junk emails with apparently-legitimate attachments are again becoming a threat. The cybersecurity industry has reduced its focus on these methods of hacking in recent years as criminals had moved on to new techniques and that could mean that current defenses do not always pick them up. The attacks are particularly risky in workplaces as they can be made to appear to have come from colleagues and contain the type of attachments that are in common use. However opening one of the malicious files, which might look like a Word or Excel document, will trigger a code that connects the computer to a server which hides malware on the machine.
