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Preview build: sign-in and grading run on the server. MFA is not enabled, and storage is in server memory so it does not survive a restart.

LearnDefend
Browser LabLD-SOC1-LAB-005Easy
Browser LabLD-SOC1-LAB-005Easy20 min

Password Spraying Against the Domain

Overnight, authentication failures across the domain rose from a typical 40 to just over 900. No single account was locked out, which is why nobody was paged. The morning shift has asked you to establish whether this was an attack and, if so, whether it succeeded.

What you will be able to do

  • Distinguish password spraying from a classic brute-force attempt
  • Determine whether any authentication succeeded
  • Identify the source and recommend a proportionate response
Windows SecurityLog AnalysisIncident TriageT1110.003Password SprayingT1069.002Domain Groups

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