Exchange anti-hacking tool from Microsoft

Hacking group Hafnium managed to breach hundreds of thousands of Exchange installations worldwide. An update is currently available to close them , but it may be too late.

However, Microsoft has also provided some tools to check Exchange installations for signs of breach.

Greece (GR) is also on the map of attacks published by Rapid7

It seems that after her attack από Ρώσους, αποκαλύφθηκε η επόμενη μεγάλη καταστροφή. Οι of the Chinese Hafnium team, exploited vulnerabilities in Exchange servers. The vulnerabilities were not closed with security updates until March 2, 2021.
The attackers 'goal was to gain control of the victims' emails and possibly access and infiltrate their network infrastructure through Active Directory licenses.

In one Publication security firm Rapid7 reports that there are at least 170.000 compromised Exchange servers. The article provides IP addresses that scan the Internet but also an analysis of how one might detect an infection. More information and analysis is provided at this Microsoft article, as well as in this US-CERT warning.

Microsoft has released a PowerShell script (Test-Hafnium) called Test-ProxyLogon.ps1 to help you identify vulnerabilities. The script and additional notes are on GitHub.

CERT Latvia also published one script on GitHub which can be used to check if an Exchange server contains a webshell.

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Written by giorgos

George still wonders what he's doing here ...

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