Researchers have discovered a sophisticated post-exploitation framework being deployed on Microsoft Exchange servers to assist threat actors with credential harvesting and local reconnaissance.
After Microsoft started blocking macros obtained from the internet by default, email attackers are exploring alternative techniques to distribute Emotet, Qakbot, IcedID and other payloads.
Microsoft researchers found a group of vulnerabilities dubbed Nimbuspwn in a Linux service named networkd-dispatcher that can lead to root privileges.
Microsoft has confirmed that the Lapsus$ group gained "limited" access after the group leaked Bing, Bing Maps and Cortana source code.
Microsoft is blocking macros by default for Office, which it hopes will make abuse by cybercriminals more difficult.