NTLM Brute Force

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-04
Category
Analytics Alert Reference
Order
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

10 Minutes

Deduplication Period

1 Day

Required Data

  • Requires:
    • XDR Agent

Detection Modules

Identity Analytics

ATT&CK Tactic

Credential Access (TA0006)

ATT&CK Technique

Brute Force (T1110)

Severity

Informational

Description

  • This may indicate an NTLM brute force attack.

Attacker's Goals

The attacker attempts to gain access to the accounts.

Investigative actions

Verify any successful authentication by the user account referenced by the alert, as these can indicate the attacker managed to guess the credentials.

Variations

NTLM brute force on a sensitive user

Synopsis

ATT&CK Tactic

Credential Access (TA0006)

ATT&CK Technique

Brute Force (T1110)

Severity

Medium

Description

  • This may indicate an NTLM brute force attack.

Attacker's Goals

The attacker attempts to gain access to the accounts.

Investigative actions

Verify any successful authentication by the user account referenced by the alert, as these can indicate the attacker managed to guess the credentials.


High-frequency NTLM brute force attempts detected

Synopsis

ATT&CK Tactic

Credential Access (TA0006)

ATT&CK Technique

Brute Force (T1110)

Severity

Low

Description

  • This may indicate an NTLM brute force attack.

Attacker's Goals

The attacker attempts to gain access to the accounts.

Investigative actions

Verify any successful authentication by the user account referenced by the alert, as these can indicate the attacker managed to guess the credentials.