Modification of NTLM restrictions in the Registry

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

N/A (single event)

Deduplication Period

1 Day

Required Data

  • Requires:
    • XDR Agent
  • Requires:
    • eXtended Threat Hunting (XTH)

Detection Modules

ATT&CK Tactic

Credential Access (TA0006)

ATT&CK Technique

OS Credential Dumping (T1003)

Severity

Medium

Description

Allowing the transmission of NTLM could be part of an NTLM downgrade or an Internal Monologue attack.

Attacker's Goals

Downgrading to a lower NTLM version gives the attacker an easy way to retrieve NTLM hashes from a Windows machine.

Investigative actions

Check whether the executing process is benign, and if this was a desired behavior as part of its normal execution flow.