Wiz Service Account Change

AnalysisType: rule
RuleID: Wiz.Service.Account.Change
Description: This rule detects creations, updates and deletions of service accounts.
DisplayName: Wiz Service Account Change
Runbook: Confirm this user acted with valid business intent and determine whether this activity was authorized.
Reference: https://www.wiz.io/blog/non-human-identities-dashboard
Enabled: true
Filename: wiz_service_account_change.py
Severity: High
Reports:
  MITRE ATT&CK:
    - TA0001:T1078.004  # Valid Accounts: Cloud Accounts
LogTypes:
  - Wiz.Audit
DedupPeriodMinutes: 60
Threshold: 1
Tests:
  - Name: DeleteServiceAccount
    ExpectedResult: true
    Log:
      {
        "id": "ac5630ca-2dd9-40a5-8137-140443cd8087",
        "action": "DeleteServiceAccount",
        "requestId": "a9291dc4-a17c-4af7-bb9e-17905082221f",
        "status": "SUCCESS",
        "timestamp": "2024-07-09T14:16:02.836387Z",
        "actionParameters": {
          "input": {
            "id": "rsao...<redacted>"
          },
          "selection": [
            "__typename",
            "_stub"
          ]
        },
        "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36",
        "sourceIP": "12.34.56.78",
        "serviceAccount": null,
        "user": {
          "__typename": "User",
          "id": "test.user@company.com",
          "name": "user@company.com"
        }
      }
  - Name: CreateUser
    ExpectedResult: false
    Log:
      {
        "id": "220d23be-f07c-4d97-b4a6-87ad04eddb14",
        "action": "CreateUser",
        "requestId": "0d9521b2-c3f8-4a73-bf7c-20257788752e",
        "status": "SUCCESS",
        "timestamp": "2024-07-29T09:40:15.66643Z",
        "actionParameters": {
          "input": {
            "assignedProjectIds": null,
            "email": "testy@company.com",
            "expiresAt": null,
            "name": "Test User",
            "role": "GLOBAL_ADMIN"
          },
          "selection": [
            "__typename",
            {
              "user": [
                "__typename",
                "id"
              ]
            }
          ]
        },
        "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36",
        "sourceIP": "8.8.8.8",
        "serviceAccount": null,
        "user": {
          "id": "someuser@company.com",
          "name": "someuser@company.com"
        }
      }
  - Name: DeleteServiceAccount - Fail
    ExpectedResult: false
    Log:
      {
        "id": "ac5630ca-2dd9-40a5-8137-140443cd8087",
        "action": "DeleteServiceAccount",
        "requestId": "a9291dc4-a17c-4af7-bb9e-17905082221f",
        "status": "FAILED",
        "timestamp": "2024-07-09T14:16:02.836387Z",
        "actionParameters": { },
        "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36",
        "sourceIP": "12.34.56.78",
        "serviceAccount": null,
        "user": {
          "__typename": "User",
          "id": "test.user@company.com",
          "name": "user@company.com"
        }
      }


# ------ paired body: wiz_service_account_change.py ------

from panther_wiz_helpers import wiz_actor, wiz_alert_context, wiz_success

SUSPICIOUS_ACTIONS = [
    "CreateServiceAccount",
    "DeleteServiceAccount",
    "UpdateServiceAccount",
]


def rule(event):
    if not wiz_success(event):
        return False
    return event.get("action", "ACTION_NOT_FOUND") in SUSPICIOUS_ACTIONS


def title(event):
    actor = wiz_actor(event)

    return (
        f"[Wiz]: [{event.get('action', 'ACTION_NOT_FOUND')}] action "
        f"performed by {actor.get('type')} [{actor.get('name')}]"
    )


def dedup(event):
    return event.get("id")


def alert_context(event):
    return wiz_alert_context(event)