> For the complete documentation index, see [llms.txt](https://omar-4.gitbook.io/omar-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://omar-4.gitbook.io/omar-docs/ecir/event-codes/dcsync-activity-detection.md).

# DCSync Activity Detection

- [Event ID 4625](https://omar-4.gitbook.io/omar-docs/ecir/event-codes/dcsync-activity-detection/event-id-4625.md): Event ID 4625 helps in detecting failed logon attempts related to DCSync attacks, especially if invalid credentials are used during an attempt to replicate data from the domain controller.
- [Event ID 4662](https://omar-4.gitbook.io/omar-docs/ecir/event-codes/dcsync-activity-detection/event-id-4662.md): related to operations performed on Active Directory (AD) objects, especially within the context of Directory Services (DS) replication.


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