Zendesk Credit Card Redaction Off

AnalysisType: rule
Filename: zendesk_sensitive_data_redaction.py
RuleID: "Zendesk.SensitiveDataRedactionOff"
DedupPeriodMinutes: 60
DisplayName: "Zendesk Credit Card Redaction Off"
Enabled: true
LogTypes:
  - Zendesk.Audit
Tags:
  - Zendesk
  - Collection:Data from Information Repositories
Reports:
  MITRE ATT&CK:
    - TA0009:T1213
Severity: High
Description: A user updated account setting that disabled credit card redaction.
Runbook: Re-enable credit card redaction.
Reference: https://support.zendesk.com/hc/en-us/articles/4408822124314-Automatically-redacting-credit-card-numbers-from-tickets
SummaryAttributes:
  - p_any_ip_addresses
Tests:
  - Name: Zendesk - Credit Card Redaction Off
    ExpectedResult: true
    Log:
      {
        "url": "https://myzendek.zendesk.com/api/v2/audit_logs/111222333444.json",
        "id": 123456789123,
        "action_label": "Updated",
        "actor_id": 123,
        "actor_name": "John Doe",
        "source_id": 123,
        "source_type": "account_setting",
        "source_label": "Credit Card Redaction",
        "action": "create",
        "change_description": "Disabled",
        "ip_address": "127.0.0.1",
        "created_at": "2021-05-28T18:39:50Z",
        "p_log_type": "Zendesk.Audit",
      }
  - Name: Zendesk - Credit Card Redaction On
    ExpectedResult: true
    Log:
      {
        "url": "https://myzendek.zendesk.com/api/v2/audit_logs/111222333444.json",
        "id": 123456789123,
        "action_label": "Updated",
        "actor_id": 123,
        "actor_name": "John Doe",
        "source_id": 123,
        "source_type": "account_setting",
        "source_label": "Credit Card Redaction",
        "action": "create",
        "change_description": "Enabled",
        "ip_address": "127.0.0.1",
        "created_at": "2021-05-28T18:39:50Z",
        "p_log_type": "Zendesk.Audit",
      }
  - Name: User assumption settings changed
    ExpectedResult: false
    Log:
      {
        "url": "https://myzendek.zendesk.com/api/v2/audit_logs/111222333444.json",
        "id": 123456789123,
        "action_label": "Updated",
        "actor_id": 123,
        "source_id": 123,
        "source_type": "account_setting",
        "source_label": "Account Assumption",
        "action": "update",
        "change_description": "Changed",
        "ip_address": "127.0.0.1",
        "created_at": "2021-05-28T18:39:50Z",
        "p_log_type": "Zendesk.Audit",
      }


# ------ paired body: zendesk_sensitive_data_redaction.py ------

from panther_zendesk_helpers import ZENDESK_CHANGE_DESCRIPTION

REDACTION_ACTIONS = {
    "create",
    "destroy",
}


def rule(event):
    return (
        event.get("source_type") == "account_setting"
        and event.get("action", "") in REDACTION_ACTIONS
        and event.get("source_label", "") == "Credit Card Redaction"
    )


def title(event):
    action = event.get(ZENDESK_CHANGE_DESCRIPTION, "<UNKNOWN_ACTION>")
    return f"User [{event.udm('actor_user')}] {action} credit card redaction"


def severity(event):
    if event.get(ZENDESK_CHANGE_DESCRIPTION, "").lower() != "disabled":
        return "INFO"
    return "HIGH"