Detection rules › Sigma
Azure Windows virtual machine login via serial console
Detects if an attacker logs on using the serial console.
Known false positives
- Virtual machine recovery by administrator
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | |
| Privilege Escalation |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Security-Auditing | Event ID 4624: An account was successfully logged on. |
Rule body
title: Azure Windows virtual machine login via serial console
description: Detects if an attacker logs on using the serial console.
references:
- https://msrc.microsoft.com/blog/2023/08/azure-serial-console-attack-and-defense-part-1/
- https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/serial-console-cmd-ps-commands
- https://www.mandiant.com/resources/blog/sim-swapping-abuse-azure-serial
tags:
- attack.initial_access
- attack.privilege_escalation
- attack.t1078 # valid accounts
author: mdecrevoisier
status: experimental
logsource:
product: windows
service: security
detection:
selection:
EventID: 4624
LogonProcess|contains: 'sacsess.exe'
LogonType: 2
condition: selection
falsepositives:
- Virtual machine recovery by administrator
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
EventID: 4624
LogonProcess|contains: 'sacsess.exe'
LogonType: 2
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
LogonProcess | match |
| field:"LogonProcess" kind:match value:"sacsess.exe" |
LogonType | eq |
| field:"LogonType" kind:eq value:"2" |