Security News > 2021 > May > Microsoft build tool abused to deliver password-stealing malware
Threat actors are abusing the Microsoft Build Engine to deploy remote access tools and information-stealing malware filelessly as part of an ongoing campaign.
This development tool can build apps on any Windows system if provided with an XML schema project file telling it how to automate the build process.
On computers where the attackers deployed the info stealer, the malware will scan for web browsers, messaging apps, and VPN and cryptocurrency software to steal user credentials.
Malware samples used in this campaign are either not detected or detected by a very low number of anti-malware engines according to VirusTotal.
The fileless malware further decreases the chances that the attack is spotted since no actual files are written on the victims' devices, with no physical traces of the payloads left on the infected devices' hard drives.
According to a WatchGuard Internet security report published at the end of March, fileless malware delivery has seen a massive increase between 2019 and 2020, skyrocketing by 888% based on a year worth of endpoint threat intelligence data collected by WatchGuard Panda products.