Modification of NTLM restrictions in the Registry

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent with eXtended Threat Hunting (XTH)
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	OS Credential Dumping (T1003)
Severity	Low

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.