Hacks for sale: inside the Buer Loader malware-as-a-service

During our investigation of a Ryuk attack in September 2020, we found the Ryuk actors had used a relatively new method for gaining initial access: a malware dropper called Buer. The September attack was part of a low-volume spear phishing attack tracked by Sophos. Over the next month, it evolved into a much larger spam […]