sigmahighHunting

Activity From Anonymous IP Address

Identifies that users were active from an IP address that has been identified as an anonymous proxy IP address.

MITRE ATT&CK

persistencedefense-evasionprivilege-escalationinitial-access

Detection Query

selection:
  riskEventType: riskyIPAddress
condition: selection

Author

Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'

Created

2023-09-03

Data Sources

azureriskdetection

Platforms

azure

References

Tags

attack.t1078attack.persistenceattack.defense-evasionattack.privilege-escalationattack.initial-access

Raw Content

title: Activity From Anonymous IP Address
id: be4d9c86-d702-4030-b52e-c7859110e5e8
status: test
description: Identifies that users were active from an IP address that has been identified as an anonymous proxy IP address.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#activity-from-anonymous-ip-address
    - 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.t1078
    - attack.persistence
    - attack.defense-evasion
    - attack.privilege-escalation
    - attack.initial-access
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'riskyIPAddress'
    condition: selection
falsepositives:
    - We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high