IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Google Workspace Resource Copied from External Drive
editGoogle Workspace Resource Copied from External Drive
editDetects when a user copies a Google spreadsheet, form, document or script from an external drive. An adversary may send a phishing email to the victim with a Drive object link where "copy" is included in the URI, thus copying the object to the victim’s drive.
Rule type: eql
Rule indices:
- filebeat-*
- logs-google_workspace*
Severity: medium
Risk score: 47
Runs every: 10m
Searches indices from: now-130m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- Google Workspace
- Continuous Monitoring
- SecOps
- Initial Access
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit### Important Information Regarding Google Workspace Event Lag Times - As per Google's documentation, Google Workspace administrators may observe lag times ranging from minutes up to 3 days between the time of an event's occurrence and the event being visible in the Google Workspace admin/audit logs. - This rule is configured to run every 10 minutes with a lookback time of 130 minutes. - To reduce the risk of false negatives, consider reducing the interval that the Google Workspace (formerly G Suite) Filebeat module polls Google's reporting API for new events. - By default, `var.interval` is set to 2 hours (2h). Consider changing this interval to a lower value, such as 10 minutes (10m). - See the following references for further information: - https://support.google.com/a/answer/7061566 - https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-module-google_workspace.html
Rule query
editfile where event.dataset == "google_workspace.drive" and event.action == "copy" and
/* Should only match if the object lives in a Drive that is external to the user's GWS organization */
google_workspace.drive.owner_is_team_drive == "false" and google_workspace.drive.copy_type == "external" and
/* Google Script, Forms, Sheets and Document can have container-bound scripts */
google_workspace.drive.file.type: ("script", "form", "spreadsheet", "document")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
-
Technique:
- Name: Phishing
- ID: T1566
- Reference URL: https://attack.mitre.org/techniques/T1566/
-
Sub-technique:
- Name: Spearphishing Link
- ID: T1566.002
- Reference URL: https://attack.mitre.org/techniques/T1566/002/