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4648SecurityAuthenticationWARNLast updated:

Logon using explicit credentials (RunAs)

What it means

A user ran something as another account. A classic manual lateral-movement signal.

First steps

  1. 1Look at the pair: which user, and which account they switched to.
  2. 2Switching to an admin account from a normal workstation warrants investigation.

Related events

This reference is a starting point for investigation, not a replacement for your organisation's security policy.