LoFP LoFP / false positives may occur when users are using a vpn or when users are traveling to different locations\"

Sample rules

M365 Identity Login from Atypical Travel Location

Description

Detects successful Microsoft 365 portal logins from rare locations. Rare locations are defined as locations that are not commonly associated with the user’s account. This behavior may indicate an adversary attempting to access a Microsoft 365 account from an unusual location or behind a VPN.

Detection logic

event.dataset:o365.audit and
    event.provider:AzureActiveDirectory and
    event.action:UserLoggedIn and
    event.outcome:success and
    o365.audit.Target.Type:(0 or 10 or 2 or 3 or 5 or 6) and
    o365.audit.UserId:(* and not "Not Available") and
    source.geo.region_iso_code:* and
    not o365.audit.ApplicationId:(
        29d9ed98-a469-4536-ade2-f981bc1d605e or
        38aa3b87-a06d-4817-b275-7a316988d93b or
        a809996b-059e-42e2-9866-db24b99a9782
    ) and not o365.audit.ExtendedProperties.RequestType:(
        "Cmsi:Cmsi" or
        "Consent:Set" or
        "Login:reprocess" or
        "Login:resume" or
        "MessagePrompt:MessagePrompt" or
        "SAS:EndAuth"
    )

M365 Identity Login from Impossible Travel Location

Description

Detects successful Microsoft 365 portal logins from impossible travel locations. Impossible travel locations are defined as two different countries within a short time frame. This behavior may indicate an adversary attempting to access a Microsoft 365 account from a compromised account or a malicious actor attempting to access a Microsoft 365 account from a different location.

Detection logic

event.dataset:o365.audit and
    event.provider:AzureActiveDirectory and
    event.action:UserLoggedIn and
    event.outcome:success and
    o365.audit.Target.Type:(0 or 10 or 2 or 3 or 5 or 6) and
    o365.audit.UserId:(* and not "Not Available") and
    source.geo.region_iso_code:* and
    not o365.audit.ApplicationId:(
        29d9ed98-a469-4536-ade2-f981bc1d605e or
        38aa3b87-a06d-4817-b275-7a316988d93b or
        a809996b-059e-42e2-9866-db24b99a9782
    ) and not o365.audit.ExtendedProperties.RequestType:(
        "Cmsi:Cmsi" or
        "Consent:Set" or
        "Login:reprocess" or
        "Login:resume" or
        "MessagePrompt:MessagePrompt" or
        "SAS:EndAuth"
    )