detection.wiki

Detection rules › Sigma

Successful Authentications From Countries You Do Not Operate Out Of

Status
test
Severity
medium
Log source
product azure, service signinlogs
Author
MikeDuddington, '@dudders1'
Source
github.com/SigmaHQ/sigma

Detect successful authentications from countries you do not operate out of.

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1078.004 Valid Accounts: Cloud Accounts
PersistenceT1078.004 Valid Accounts: Cloud Accounts
Privilege EscalationT1078.004 Valid Accounts: Cloud Accounts
StealthT1078.004 Valid Accounts: Cloud Accounts
Credential AccessT1110 Brute Force

Rule body yaml

title: Successful Authentications From Countries You Do Not Operate Out Of
id: 8c944ecb-6970-4541-8496-be554b8e2846
status: test
description: Detect successful authentications from countries you do not operate out of.
references:
    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts
author: MikeDuddington, '@dudders1'
date: 2022-07-28
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.credential-access
    - attack.stealth
    - attack.t1078.004
    - attack.t1110
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        Status: 'Success'
    filter:
        Location|contains: '<Countries you DO operate out of e,g GB, use OR for multiple>'
    condition: selection and not filter
falsepositives:
    - If this was approved by System Administrator.
level: medium

Stages and Predicates

Stage 0: condition

selection and not filter

Stage 1: selection

selection:
    Status: 'Success'

Stage 2: not filter

filter:
    Location|contains: '<Countries you DO operate out of e,g GB, use OR for multiple>'

Exclusions

Top-level NOT(...) conjuncts: predicates this rule actively suppresses.

FieldKindExcluded values
Locationmatch<Countries you DO operate out of e,g GB, use OR for multiple>

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Statuseq
  • Success