Slack Microsoft Intune Mobile Device Management Disabled

AnalysisType: rule
Filename: slack_intune_mdm_disabled.py
RuleID: "Slack.AuditLogs.IntuneMDMDisabled"
DisplayName: "Slack Microsoft Intune Mobile Device Management Disabled"
Enabled: true
LogTypes:
  - Slack.AuditLogs
Tags:
  - Slack
  - Defense Evasion
  - Impair Defenses
  - Disable or Modify Tools
  - Mobile Security
  - Data Loss Prevention
Reports:
  MITRE ATT&CK:
    - TA0005:T1562.001
    - TA0010:T1567
Severity: Critical
Description: >
  Detects when Microsoft Intune MDM integration is disabled for Slack, removing mobile security controls and enabling data exfiltration via unmanaged devices. Intune enforces policies preventing copy/paste to unmanaged apps, requires device encryption, blocks jailbroken devices, and enables remote wipe. Disabling these controls allows unrestricted Slack access from personal or compromised devices without security restrictions.
Reference: https://slack.com/intl/en-gb/help/articles/6495319642387-Set-up-Slack-for-Intune-mobile-apps
Runbook: |
  1. Query Slack audit logs for all security control modifications by actor.user.email in the 30 days around this event including EKM changes, data retention policy modifications, export permission changes, and session management settings to identify a pattern of defense evasion
  2. Search Slack audit logs for mobile app login events, file downloads, and data exports during the period when Intune MDM was disabled to detect potential data exfiltration via unmanaged mobile devices
  3. Review Microsoft Intune admin logs and Azure AD audit logs for correlated suspicious activity by the same actor such as removing devices from management or disabling other mobile security policies
DedupPeriodMinutes: 60
Threshold: 1
SummaryAttributes:
  - p_any_ip_addresses
  - p_any_emails
Tests:
  - Name: Intune Disabled
    ExpectedResult: true
    Log:
      {
        "action": "intune_disabled",
        "actor":
          {
            "type": "user",
            "user":
              {
                "email": "user@example.com",
                "id": "A012B3CDEFG",
                "name": "username",
                "team": "T01234N56GB",
              },
          },
        "context":
          {
            "ip_address": "1.2.3.4",
            "location":
              {
                "domain": "test-workspace",
                "id": "T01234N56GB",
                "name": "test-workspace",
                "type": "workspace",
              },
            "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36",
          },
      }
  - Name: User Logout
    ExpectedResult: false
    Log:
      {
        "action": "user_logout",
        "actor":
          {
            "type": "user",
            "user":
              {
                "email": "user@example.com",
                "id": "W012J3FEWAU",
                "name": "primary-owner",
                "team": "T01234N56GB",
              },
          },
        "context":
          {
            "ip_address": "1.2.3.4",
            "location":
              {
                "domain": "test-workspace-1",
                "id": "T01234N56GB",
                "name": "test-workspace-1",
                "type": "workspace",
              },
            "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36",
          },
        "date_create": "2022-07-28 15:22:32",
        "entity":
          {
            "type": "user",
            "user":
              {
                "email": "user@example.com",
                "id": "W012J3FEWAU",
                "name": "primary-owner",
                "team": "T01234N56GB",
              },
          },
        "id": "72cac009-9eb3-4dde-bac6-ee49a32a1789",
      }