Temporary Access Pass Added To An Account

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

Detects when a temporary access pass (TAP) is added to an account. TAPs added to priv accounts should be investigated

Known false positives

Administrator adding a legitimate temporary access pass

MITRE ATT&CK coverage

Tactic	Techniques
Initial Access	`T1078.004` Valid Accounts: Cloud Accounts
Persistence	`T1078.004` Valid Accounts: Cloud Accounts
Privilege Escalation	`T1078.004` Valid Accounts: Cloud Accounts
Stealth	`T1078.004` Valid Accounts: Cloud Accounts

Telemetry coverage

Platform	Record / event type
Azure	Admin registered security info

Rules detecting the same action

These rules filter on the same operation.

Rule body

title: Temporary Access Pass Added To An Account
id: fa84aaf5-8142-43cd-9ec2-78cfebf878ce
status: test
description: Detects when a temporary access pass (TAP) is added to an account. TAPs added to priv accounts should be investigated
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'
date: 2022-08-10
tags:
    - attack.privilege-escalation
    - attack.initial-access
    - attack.persistence
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Admin registered security info
        Status: Admin registered temporary access pass method for user
    condition: selection
falsepositives:
    - Administrator adding a legitimate temporary access pass
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    properties.message: Admin registered security info
    Status: Admin registered temporary access pass method for user

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Status`	eq	`Admin registered temporary access pass method for user`	`field:"Status" kind:eq value:"Admin registered temporary access pass method for user"`
`properties.message`	eq	`Admin registered security info`	`field:"properties.message" kind:eq value:"Admin registered security info"`