This indicates an attack attempt to exploit a Privilege Escalation vulnerability in Microsoft Windows.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted application file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted application file.
Windows Server 2012 (3168965)
Windows 10 for 32-bit Systems (3163912)
Windows 10 for x64-based Systems (3163912)
Windows 10 Version 1511 for 32-bit Systems (3172985)
Windows 10 Version 1511 for x64-based Systems (3172985)
Windows Server 2012 (Server Core installation) (3168965)
Privilege Escalation: Remote attackers can leverage their privileges on vulnerable systems.
Apply the most recent upgrade or patch from the vendor.