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Detection rules › Sigma

Privileged Account Creation

Status
test
Severity
medium
Log source
product azure, service auditlogs
Author
Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H', Tim Shelton
Source
github.com/SigmaHQ/sigma

Detects when a new admin is created.

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1078.004 Valid Accounts: Cloud Accounts
PersistenceT1078.004 Valid Accounts: Cloud Accounts
Privilege EscalationT1078.004 Valid Accounts: Cloud Accounts
StealthT1078.004 Valid Accounts: Cloud Accounts

Rule body yaml

title: Privileged Account Creation
id: f7b5b004-dece-46e4-a4a5-f6fd0e1c6947
status: test
description: Detects when a new admin is created.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts#changes-to-privileged-accounts
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H', Tim Shelton
date: 2022-08-11
modified: 2022-08-16
tags:
    - attack.initial-access
    - attack.persistence
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message|contains|all:
            - Add user
            - Add member to role
        Status: Success
    condition: selection
falsepositives:
    - A legitimate new admin account being created
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    properties.message|contains|all:
        - Add user
        - Add member to role
    Status: Success

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Statuseq
  • Success
properties.messagematch
  • Add member to role
  • Add user