GitHub Secret Scanning Disabled Or Bypassed

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 * Copyright 2024 Google LLC
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

rule github_secret_scanning_disabled_or_bypassed {

  meta:
    author = "Google Cloud Security"
    description = "Detects when components of GitHub secret scanning is disabled for an enterprise or organization."
    rule_id = "mr_982454f3-81ab-491a-b61c-bae718d6028e"
    rule_name = "GitHub Secret Scanning Disabled Or Bypassed"
    assumption = "Your GitHub enterprise audit log settings are configured to log the source IP address for events. Reference: https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-security-settings-for-your-organization/displaying-ip-addresses-in-the-audit-log-for-your-organization"
    type = "alert"
    severity = "High"
    priority = "High"
    platform = "GitHub"
    data_source = "github"
    mitre_attack_tactic = "Defense Evasion"
    mitre_attack_technique = "Impair Defenses: Disable or Modify Tools"
    mitre_attack_url = "https://attack.mitre.org/versions/v14/techniques/T1562/001/"
    mitre_attack_version = "v14"
    reference = "https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/audit-log-events-for-your-enterprise"

  events:
    $github.metadata.vendor_name = "GITHUB" nocase
    $github.metadata.product_name = "GITHUB"
    (
        $github.metadata.product_event_type = "secret_scanning.disable" or
        $github.metadata.product_event_type = "secret_scanning_new_repos.disable" or
        $github.metadata.product_event_type = "secret_scanning_push_protection.bypass" or
        $github.metadata.product_event_type = "business_secret_scanning_custom_pattern_push_protection.disabled" or
        $github.metadata.product_event_type = "business_secret_scanning.disable" or
        $github.metadata.product_event_type = "business_secret_scanning.disabled_for_new_repos" or
        $github.metadata.product_event_type = "business_secret_scanning_push_protection_custom_message.disable" or
        $github.metadata.product_event_type = "business_secret_scanning_push_protection.disable" or
        $github.metadata.product_event_type = "business_secret_scanning_push_protection.disabled_for_new_repos" or
        $github.metadata.product_event_type = "org_secret_scanning_generic_secrets.disabled" or
        $github.metadata.product_event_type = "repository_secret_scanning.disable" or
        $github.metadata.product_event_type = "repository_secret_scanning_generic_secrets.disabled" or
        $github.metadata.product_event_type = "repository_secret_scanning_push_protection.disable"
    )

  outcome:
    $risk_score = max(85)
    $mitre_attack_tactic = "Defense Evasion"
    $mitre_attack_technique = "Impair Defenses: Disable or Modify Tools"
    $mitre_attack_technique_id = "T1562.001"
    $principal_ip = array_distinct($github.principal.ip)
    $principal_user_userid = array_distinct($github.principal.user.userid)
    $principal_ip_country = array_distinct($github.principal.ip_geo_artifact.location.country_or_region)
    $principal_ip_state = array_distinct($github.principal.ip_geo_artifact.location.state)
    $principal_ip_city = array_distinct($github.principal.location.city)
    $security_result_summary = array_distinct($github.security_result.summary)

  condition:
    $github
}