Deprecated - Potential Password Spraying of Microsoft 365 User Accounts
editDeprecated - Potential Password Spraying of Microsoft 365 User Accounts
editIdentifies a high number (25) of failed Microsoft 365 user authentication attempts from a single IP address within 30 minutes, which could be indicative of a password spraying attack. An adversary may attempt a password spraying attack to obtain unauthorized access to user accounts.
Rule type: threshold
Rule indices:
- filebeat-*
- logs-o365*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-30m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Cloud
- Data Source: Microsoft 365
- Use Case: Identity and Access Audit
- Tactic: Credential Access
Version: 208
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
editThis rule has been deprecated in favor of Attempts to Brute Force a Microsoft 365 User Account
(26f68dba-ce29-497b-8e13-b4fde1db5a2d).
Rule query
editevent.dataset:o365.audit and event.provider:(Exchange or AzureActiveDirectory) and event.category:authentication and event.action:("UserLoginFailed" or "PasswordLogonInitialAuthUsingPassword")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: Brute Force
- ID: T1110
- Reference URL: https://attack.mitre.org/techniques/T1110/