Analytics Informational
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NTLM Password Spray

A single host tried to perform an unusual amount of login attempts using NTLM in a short period of time. This may be indicative of a NTLM password spray attack.

Module:
Identity Analytics
Data source:
Palo Alto Networks Firewall traffic Logs, XDR Agent
ATT&CK tactics: Credential Access (TA0006)
ATT&CK techniques: Brute Force: Password Spraying (T1110.003)
Attacker's goals:

The attacker may attempt to guess user credential by password spray attack over multiple machines.

Investigative actions:

Verify any successful authentication made by one of the user accounts referenced by the alert, as these may indicate the attacker managed to guess the credentials.

Test period:
10 Minutes
Deduplication:
1 Day
1 variation:
  • NTLM password spray on a sensitive entity Low (parent: Informational)