This indicates an attack attempt to exploit an Information Disclosure vulnerability in Microsoft Windows.
This vulnerability is due to an error while the affected application handles a maliciously crafted SMB request. A remote attacker may be able to exploit this to access sensitive information, via a crafted request.
Microsoft Windows 7
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows 10
Microsoft Windows Server 2012
Microsoft Windows Server 2016
Microsoft Windows Server 2008
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the most recent upgrade or patch from the vendor.