Analytics BIOC
Informational
✕
Unusual weak authentication by user
A user account authenticated to a host via NTLMv1 or LM authentication for the first time in the past 30 days. This may be indicative of an NTLM downgrade attack A downgrade attack may force the client to authenticate with a weaker hash/protocol (such as NTLMv1 or even LM) instead of NTLMv2.
- Module:
- Identity Analytics
- Data source:
- XDR Agent
ATT&CK tactics: Lateral Movement (TA0008)
ATT&CK techniques: Use Alternate Authentication Material (T1550)
Attacker's goals:
The attacker attempts to gain access to the accounts.
Investigative actions:
Audit all login events with a weaker protocol and review any anomalous usage.
- Test period:
- N/A (single event)
- Deduplication:
- 1 Day