Fileless malware is a type of dangerous software that doesn't have any files and antivirus programs can't find it.
People often say that cybercriminals are always one step ahead of security. The case of fileless malware seems to back this up. In other words, it's a kind of malware that can hurt a computer without needing to install any files. Not only is this a common trick used by hackers, but it's also very hard to find.
Experts say this threat is a game-changer because regular antivirus programs can't easily find it. So what can be done about these attacks, and how can they be found? Experts say that it's not easy, but it's not impossible if you're careful.
As specialized media outlets have said, the most difficult part of this problem is that Fileless works directly in system memory. This means that it doesn't need to download and install harmful files, it doesn't leave any traces on the hard drive, and it doesn't install any programs that are visible. Instead, it uses tools that are already on the computer.
For instance, malicious code can be run with programs like PowerShell or even the operating system itself. What does this mean exactly? In short, it's a cybersecurity problem. Traditional antivirus programs are designed to detect suspicious files, but if there's no file, there's nothing to identify. In this way, an attack can go undetected.
This also leads to another undesirable outcome for users. Unlike most common malware, fileless malware is capable of operating for extended periods before detection. Experts confirm this unequivocally, acknowledging that, more often than not, by the time the threat is discovered, it has already caused significant damage to users.
And how does it work? Well, it's not much different from similar threats. It's capable of stealing sensitive data, potentially putting anyone at risk. Therefore, it's no surprise that this type of malware is frequently used to attack businesses. This allows cybercriminals to easily access the information of numerous customers or even the accounts of the targeted company itself.
At the solution level, Fileless requires a fundamental shift in thinking. Instead of searching for malicious files, the most common approach, it's essential to identify anomalous behaviors within systems. This allows for the detection of suspicious activity even in the absence of traditional malware. Of course, identifying the problem often takes longer, with all the associated difficulties.
However, experts emphasize that relying solely on traditional defense methods is insufficient these days. While certainly not unnecessary, it is equally important to anticipate danger, especially when it is subtle, as is the case now.