The campaign has exploited recently discovered flaws in Microsoft Exchange software, stealing email and infecting computer servers with tools that let attackers take control remotely,
“Everyone running these servers needs to act now to patch them. We are concerned that there are a large number of victims,” White House spokeswoman Jennifer Psaki said .
After Microsoft released patches for the vulnerabilities on Tuesday, attacks “dramatically stepped up” on servers not yet updated with security fixes, said Krebs, who cited unnamed sources familiar with the situation
In a blog post on Tuesday, Microsoft executive Tom Burt said the company had released updates to fix the security flaws, which apply to on-premises versions of the software rather than cloud-based versions, and urged customers to apply them
Please ensure your On site Exchange Servers are fully patched or call Cloud9 for help, advice and support.