Windows Security Log Event ID 4933

Operating Systems Windows 2008 R2 and 7
Windows 2012 R2 and 8.1
Windows 2016 and 10
Windows Server 2019
Category
 • Subcategory		Directory Service
 • Directory Service Replication
Type Success
Corresponding events
in Windows 2003
and before		  
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4933: Synchronization of a replica of an Active Directory naming context has ended

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Directory Service replication has little to no security relevance.  I recommend disabling these 2 subcategories: 

  • Directory Service Replication
  • Detailed Directory Service Replication

Since DCSync and DCShadow have come out I've changed my mind about the above statement.  Check out this webinar AD Attack Deep Dive: Gaining Persistence using DCSync and DCShadow with Mimikatz

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Examples of 4933

Synchronization of a replica of an Active Directory naming context has ended.

Destination DRA: CN=NTDS Settings,CN=WIN-857ZZX6RQHL,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=acme-fr,DC=local
Source DRA: CN=NTDS Settings,CN=WIN-R9H529RIO4Y,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=acme-fr,DC=local
Naming Context: CN=Configuration,DC=acme-fr,DC=local
Options:  85
Session ID: 41
End USN: 12842
Status Code: 0

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Discussions on Event ID 4933
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