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Hackers are now installing Ransomware using Hafnium Exchange Server exploit

March 12, 2021 by justin26

The original Hafnium server hacks were likely espionage-motivated, but now the predicted second wave driven clearly by criminal intent has started.

Microsoft has confirmed hackers are attacking unpatched Exchange servers and installing the Dearcry ransomware on some occasions.

The Dearcry ransomware then attempts to prevent Windows Update from running and installing a fix for the vulnerability. The next step is encrypting your files and then delivering a ransom note on your desktop.

While Microsoft has released a patch more than 10 days ago, Palo Alto Networks noted that 80,000 older servers are still unpatched.

“I’ve never seen security patch rates this high for any system, much less one as widely deployed as Microsoft Exchange,” said Matt Kraning, Chief Technology Officer, Cortex at Palo Alto Networks. “Still, we urge organizations running all versions of Exchange to assume they were compromised before they patched their systems, because we know attackers were exploiting these zero-day vulnerabilities in the wild for at least two months before Microsoft released the patches on March 2.”

via BleepingComputer

Related posts:

  1. Microsoft: ProxyShell bugs “might be exploited,” patch servers now!
  2. Microsoft Windows Security Updates September 2020 overview
  3. Microsoft Windows Security Updates February 2019 overview
  4. The Week in Ransomware – February 2nd 2018 – TOR Sites Stealing Ransom Payments & GandCrab
  5. Microsoft December 2020 Patch Tuesday fixes 58 vulnerabilities
  6. Turn On Built-in Ransomware Protection In Windows 10
  7. New ransomware is being used to target unpatched Microsoft Exchange servers
  8. Trend Micro Ransomware File Decryptor will decrypt files encrypted by Ransomware
  9. McAfee Ransomware Recover (Mr2) can help in decrypting files encrypted by Ransomware
  10. Microsoft Windows Security Updates November 2020 overview

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