Sign-In From Malware Infected IP

Description

Indicates sign-ins from IP addresses infected with malware that is known to actively communicate with a bot server.

Query · sigma

selection:
  riskEventType: malwareInfectedIPAddress
condition: selection

Known false positives

  • Using an IP address that is shared by many users
Raw source Sign-In From Malware Infected IP · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Sign-In From Malware Infected IP
id: 821b4dc3-1295-41e7-b157-39ab212dd6bd
status: test
description: Indicates sign-ins from IP addresses infected with malware that is known to actively communicate with a bot server.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malware-linked-ip-address-deprecated
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-03
tags:
    - attack.t1090
    - attack.command-and-control
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'malwareInfectedIPAddress'
    condition: selection
falsepositives:
    - Using an IP address that is shared by many users
level: high

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