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Detection rules › Sigma

Account Created And Deleted Within A Close Time Frame

Status
test
Severity
high
Log source
product azure, service auditlogs
Author
Mark Morowczynski '@markmorow', MikeDuddington, '@dudders1', Tim Shelton
Source
github.com/SigmaHQ/sigma

Detects when an account was created and deleted in a short period of time.

Known false positives

  • Legit administrative action

MITRE ATT&CK coverage

TacticTechniques
Initial Access
Persistence
Privilege Escalation
Stealth

Telemetry coverage

PlatformRecord / event type
AzureAdd user
AzureDelete user

Rules detecting the same action

These rules filter on the same operation.

Rule body

title: Account Created And Deleted Within A Close Time Frame
id: 6f583da0-3a90-4566-a4ed-83c09fe18bbf
status: test
description: Detects when an account was created and deleted in a short period of time.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#short-lived-accounts
author: Mark Morowczynski '@markmorow', MikeDuddington, '@dudders1', Tim Shelton
date: 2022-08-11
modified: 2022-08-18
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message:
            - Add user
            - Delete user
        Status: Success
    condition: selection
falsepositives:
    - Legit administrative action
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    properties.message:
        - Add user
        - Delete user
    Status: Success

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Statuseq
  • Success
field:"Status" kind:eq value:"Success"
properties.messageeq
  • Add user
  • Delete user
field:"properties.message" kind:eq