ID | Technique | Tactic |
---|---|---|
T1485 | Data Destruction | Impact |
T1195 | Supply Chain Compromise | Initial Access |
Detection: GitHub Enterprise Remove Organization
Description
The following analytic detects when a user removes an organization from GitHub Enterprise. The detection monitors GitHub Enterprise audit logs for organization deletion events, which could indicate unauthorized removal of critical business resources. For a SOC, identifying organization removals is crucial as it may signal account compromise, insider threats, or malicious attempts to disrupt business operations by deleting entire organizational structures. The impact could be severe, potentially resulting in loss of source code, repositories, team structures, access controls, and other critical organizational assets. This disruption could halt development workflows, cause data loss, and require significant effort to restore from backups if available. Additionally, unauthorized organization removal could be part of a larger attack campaign aimed at destroying or compromising enterprise assets.
Search
1`github_enterprise` action=business.remove_organization
2| fillnull
3| stats count min(_time) as firstTime max(_time) as lastTime by actor, actor_id, actor_is_bot, actor_location.country_code, business, business_id, org, org_id, user_agent, action
4| eval user=actor
5| `security_content_ctime(firstTime)`
6| `security_content_ctime(lastTime)`
7| `github_enterprise_remove_organization_filter`
Data Source
Name | Platform | Sourcetype | Source |
---|---|---|---|
GitHub Enterprise Audit Logs | N/A | 'httpevent' |
'http:github' |
Macros Used
Name | Value |
---|---|
github_enterprise | source=http:github sourcetype=httpevent |
github_enterprise_remove_organization_filter | search * |
github_enterprise_remove_organization_filter
is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Annotations
Default Configuration
This detection is configured by default in Splunk Enterprise Security to run with the following settings:
Setting | Value |
---|---|
Disabled | true |
Cron Schedule | 0 * * * * |
Earliest Time | -70m@m |
Latest Time | -10m@m |
Schedule Window | auto |
Creates Risk Event | True |
Implementation
You must ingest GitHub Enterprise logs using Audit log streaming as described in this documentation https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/streaming-the-audit-log-for-your-enterprise#setting-up-streaming-to-splunk using a Splunk HTTP Event Collector.
Known False Positives
unknown
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message:
$user$ removed an organization from GitHub Enterprise
Risk Object | Risk Object Type | Risk Score | Threat Objects |
---|---|---|---|
user | user | 25 | user_agent |
References
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | http:github |
httpevent |
Integration | ✅ Passing | Dataset | http:github |
httpevent |
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
Source: GitHub | Version: 1