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Change log for version 1.253.822.0 
This page shows you what's changed in the most recent definitions update for Microsoft antimalware and antispyware software.
The latest update is:
- 1.253.822.0
Select change log
The following tables list the new and updated definitions for the version you select here. You can choose from the 20 latest updates, and the most recent update is shown by default:
Definition available date: Oct 16,2017 04:12 PM UTC
New definitions
No new threats have been identified in this definition update.
Updated definitions
| Trojan:O97M/Madeba.A!det | severe |
| Trojan:Win32/Emotet.P | severe |
| TrojanDownloader:O97M/Donoff | severe |
