Detectionmediumtest

Multifactor Authentication Interrupted

Identifies user login with multifactor authentication failures, which might be an indication an attacker has the password for the account but can't pass the MFA challenge.

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Launch

AlertIQCreated Sun Oct 10Updated Sun Dec 185496ff55-42ec-4369-81cb-00f417029e25cloud

Log Source

Azuresigninlogs

ProductAzure← raw: azure

Servicesigninlogs← raw: signinlogs

Detection Logic

detection:
    selection_50074:
        ResultType: 50074
        ResultDescription|contains: 'Strong Auth required'
    selection_500121:
        ResultType: 500121
        ResultDescription|contains: 'Authentication failed during strong authentication request'
    condition: 1 of selection_*

False Positives

Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References

Resolving title…

learn.microsoft.com

MITRE ATT&CK

Tactics

TA0004 · Privilege Escalation TA0003 · Persistence TA0005 · Defense Evasion TA0001 · Initial Access TA0006 · Credential Access

Techniques

T1110 · Brute Force T1621 · Multi-Factor Authentication Request Generation

Sub-techniques

T1078.004 · Cloud Accounts

Rule Metadata

Rule ID

5496ff55-42ec-4369-81cb-00f417029e25

Status

test

Level

medium

Type

Detection

Created

Sun Oct 10

Modified

Sun Dec 18

Author

AlertIQ

Path

rules/cloud/azure/signin_logs/azure_mfa_interrupted.yml

Raw Tags

attack.privilege-escalationattack.persistenceattack.defense-evasionattack.initial-accessattack.credential-accessattack.t1078.004attack.t1110attack.t1621

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