Microsoft Shares Additional Mitigations for Exchange Server Vulnerabilities Under Attack
Posted March 6, 2021
- Microsoft on Friday released alternative mitigation measures for organizations who have not been able to immediately apply emergency out-of-band patches released earlier this week that address vulnerabilities being exploited to siphon e-mail data from corporate Microsoft Exchange servers.
- Microsoft also provided a nmap script to help customers discover vulnerable servers within their infrastructure.
- Analysts say that HAFNIUM, a state-sponsored hacking group operating out of China, has been on an an active hacking spree with a massive espionage campaign underway to siphon data from organizations globally.
- “This is the real deal. If your organization runs an OWA server exposed to the internet, assume compromise between 02/26-03/03,” Ex-CISA Chief Chris Krebs tweeted. “Check for 8 character aspx files in C:\inetpubwwwrootaspnet_clientsystem_web. If you get a hit on that search, you’re now in incident response mode.“
– Mike Lennon | March 6, 2021