Ransomware is targeting vulnerable Microsoft Exchange servers

The Microsoft Exchange attacks using the ProxyLogon vulnerability, and previously associated with the dropping of malicious web shells, are taking on a ransomware twist. Until now, the name of the game has been compromise and data exfiltration, with a bit of cryptomining on the side. To summarise...

URGENT — 4 Actively Exploited 0-Day Flaws Found in Microsoft Exchange

Microsoft has released emergency patches to address four previously undisclosed security flaws in Exchange Server that it says are being actively exploited by a new Chinese state-sponsored threat actor with the goal of perpetrating data theft. Describing the attacks as "limited and targeted,"...