Query: detection rule: Detects files that have extensions commonly seen while SDelete is used to wipe files.
Matching passage: Sigma rule: Detects files that have extensions commonly seen while SDelete is used to wipe files.. Logsource: windows / security. Rule: title: Potential Secure Deletion with SDelete id: 39a80702-d7ca-4a83-b776-525b1f86a36d status: test description: Detects files that have extensions commonly seen while SDelete is used to wipe files. references: - https://jpcertcc.github.io/ToolAnalysisResultSheet/details/sdelete.htm - https://www.jpcert.or.jp/english/pub/sr/ir_research.html - https://learn.microsoft.com/en-gb/sysinternals/downloads/sdelete author: Thomas Patzke date: 2017-06-14 modified: 2024-12-13 tags: - attack.impact - attack.stealth - attack.defense-impairment - attack.t1070.004 - attack.t1027.005 - attack.t1485 - attack.t1553.002 - attack.s0195 logsource: product: windows service: security detection: selection: EventID: - 4656 - 4663 - 4658 ObjectName|endswith: - .AAA - .ZZZ condition: selection falsepositives: - Legitimate usage of SDelete - Files that are interacted with that have these extensions legitimately level: medium
Near-miss passage: Sigma rule: A self-hosted runner is a system that you deploy and manage to execute jobs from GitHub Actions on GitHub.com. This rule. Logsource: github / audit. Rule: title: Github Self Hosted Runner Changes Detected id: f8ed0e8f-7438-4b79-85eb-f358ef2fbebd status: test description: 'A self-hosted runner is a system that you deploy and manage to execute jobs from GitHub Actions on GitHub.com. This rule detects changes to self-hosted runners configurations in the environment. The self-hosted runner configuration changes once detected, it should be validated from GitHub UI because the log entry may not provide full context. ' author: Muhammad Faisal (@faisalusuf) date: 2023-01-27 references: - https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners#about-self-hosted-runners - https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-security-settings-for-your-organization/reviewing-the-audit-log-for-your-organization#search-based-on-operation tags: - attack.impact - attack.discovery - attack.collection - attack.persistence - attack.privilege-escalation - attack.initial-access - attack.stealth - attack.t1526 - attack.t1213.003 - attack.t1078.004 logsource: product: github service: audit definition: 'Requirements: The audit log streaming feature must be enabled to be able to receive such logs. You can enable following the documentation here: 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-audit-log-streaming' detection: selection: action: - org.remove_self_hosted_runner - org.runner_group_created - org.runner_group_removed - org.runner_group_runner_removed - org.runner_group_runners_added - org.runner_group_runners_updated - org.runner_group_updated - repo.register_self_hosted_runner - repo.remove_self_hosted_runner condition: selection falsepositives: - Allowed self-hosted runners changes in the environment. - A self-hosted runner is automatically removed from GitHub if it has not connected to GitHub Actions for more than 14 days. - An ephemeral self-hosted runner is automatically removed from GitHub if it has not connected to GitHub Actions for more than 1 day. level: low