sigmahighHunting

Use of Legacy Authentication Protocols

Alert on when legacy authentication has been used on an account

MITRE ATT&CK

privilege-escalationpersistencedefense-evasioninitial-accesscredential-access

Detection Query

selection:
  ActivityDetails: Sign-ins
  ClientApp:
    - Other client
    - IMAP
    - POP3
    - MAPI
    - SMTP
    - Exchange ActiveSync
    - Exchange Web Services
  Username: UPN
condition: selection

Author

Yochana Henderson, '@Yochana-H'

Created

2022-06-17

Data Sources

azuresigninlogs

Platforms

azure

References

https://learn.microsoft.com/en-gb/entra/architecture/security-operations-privileged-accounts

Tags

attack.privilege-escalationattack.persistenceattack.defense-evasionattack.initial-accessattack.credential-accessattack.t1078.004attack.t1110

Raw Content

title: Use of Legacy Authentication Protocols
id: 60f6535a-760f-42a9-be3f-c9a0a025906e
status: test
description: Alert on when legacy authentication has been used on an account
references:
    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-privileged-accounts
author: Yochana Henderson, '@Yochana-H'
date: 2022-06-17
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.defense-evasion
    - attack.initial-access
    - attack.credential-access
    - attack.t1078.004
    - attack.t1110
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        ActivityDetails: Sign-ins
        ClientApp:
            - Other client
            - IMAP
            - POP3
            - MAPI
            - SMTP
            - Exchange ActiveSync
            - Exchange Web Services
        Username: 'UPN'
    condition: selection
falsepositives:
    - User has been put in acception group so they can use legacy authentication
level: high