Google Workspace Drive Encryption Key(s) Accessed from Anonymous User

Last updated 2 months ago on 2024-09-23

Created 2 years ago on 2023-03-21

About

Detects when an external (anonymous) user has viewed, copied or downloaded an encryption key file from a Google Workspace drive. Adversaries may gain access to encryption keys stored in private drives from rogue access links that do not have an expiration. Access to encryption keys may allow adversaries to access sensitive data or authenticate on behalf of users.

Tags

Domain: CloudData Source: Google WorkspaceUse Case: Configuration AuditTactic: Credential Access

Severity

high

Risk Score

MITRE ATT&CK™

Credential Access (TA0006)(opens in a new tab or window)

↳ Unsecured Credentials (T1552)(opens in a new tab or window)

False Positive Examples

A user may generate a shared access link to encryption key files to share with others. It is unlikely that the intended recipient is an external or anonymous user.

License

Elastic License v2(opens in a new tab or window)

Definition

Rule Type: Event Correlation Rule
Integration Pack: Prebuilt Security Detection Rules
Index Patterns: filebeat-*logs-google_workspace*
Related Integrations: google_workspace(opens in a new tab or window)
Query

file where event.dataset == "google_workspace.drive" and event.action : ("copy", "view", "download") and
    google_workspace.drive.visibility: "people_with_link" and source.user.email == "" and
    file.extension: (
        "token","assig", "pssc", "keystore", "pub", "pgp.asc", "ps1xml", "pem", "gpg.sig", "der", "key",
        "p7r", "p12", "asc", "jks", "p7b", "signature", "gpg", "pgp.sig", "sst", "pgp", "gpgz", "pfx", "crt",
        "p8", "sig", "pkcs7", "jceks", "pkcs8", "psc1", "p7c", "csr", "cer", "spc", "ps2xml")

Install detection rules in Elastic Security

Detect Google Workspace Drive Encryption Key(s) Accessed from Anonymous User in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).