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</div>

## GitHub Actions Runtime Security
## Harden Github-hosted and self-hosted runners

Harden-Runner provides runtime security for GitHub-hosted and self-hosted environments.
Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners.

For self-hosted environments, Harden-Runner supports:

Expand All @@ -26,9 +26,9 @@ For self-hosted environments, Harden-Runner supports:

## Explore open source projects using Harden-Runner

| [![CISA](https://avatars.githubusercontent.com/u/18539691?s=60&v=4)](https://app.stepsecurity.io/github/cisagov/skeleton-generic/actions/runs/6199340224) | [![Microsoft](https://avatars.githubusercontent.com/u/6154722?s=60&v=4)](https://app.stepsecurity.io/github/microsoft/ebpf-for-windows/actions/runs/5559160177) | [![Google](https://avatars.githubusercontent.com/u/2810941?s=60&v=4)](https://app.stepsecurity.io/github/GoogleCloudPlatform/functions-framework-ruby/actions/runs/5546354505) | [![DataDog](https://avatars.githubusercontent.com/u/365230?s=60&v=4)](https://app.stepsecurity.io/github/DataDog/stratus-red-team/actions/runs/5387101451) | [![Intel](https://avatars.githubusercontent.com/u/17888862?s=60&v=4)](https://app.stepsecurity.io/github/intel/cve-bin-tool/actions/runs/5579910614) | [![Kubernetes](https://avatars.githubusercontent.com/u/36015203?s=60&v=4)](https://app.stepsecurity.io/github/kubernetes-sigs/cluster-api-provider-azure/actions/runs/5581511101) | [![Node.js](https://avatars.githubusercontent.com/u/9950313?s=60&v=4)](https://app.stepsecurity.io/github/nodejs/node/actions/runs/5563468674) | [![Mastercard](https://avatars.githubusercontent.com/u/1653148?s=60&v=4)](https://app.stepsecurity.io/github/Mastercard/flow/actions/runs/5542112873) |
| [![CISA](https://avatars.githubusercontent.com/u/18539691?s=60&v=4)](https://app.stepsecurity.io/github/cisagov/skeleton-generic/actions/runs/7588528684) | [![Microsoft](https://avatars.githubusercontent.com/u/6154722?s=60&v=4)](https://app.stepsecurity.io/github/microsoft/ebpf-for-windows/actions/runs/7587031851) | [![Google](https://avatars.githubusercontent.com/u/2810941?s=60&v=4)](https://app.stepsecurity.io/github/GoogleCloudPlatform/functions-framework-ruby/actions/runs/7576989995) | [![DataDog](https://avatars.githubusercontent.com/u/365230?s=60&v=4)](https://app.stepsecurity.io/github/DataDog/stratus-red-team/actions/runs/7446169664) | [![Intel](https://avatars.githubusercontent.com/u/17888862?s=60&v=4)](https://app.stepsecurity.io/github/intel/cve-bin-tool/actions/runs/7590975903) | [![Kubernetes](https://avatars.githubusercontent.com/u/36015203?s=60&v=4)](https://app.stepsecurity.io/github/kubernetes-sigs/cluster-api-provider-azure/actions/runs/7591172950) | [![Node.js](https://avatars.githubusercontent.com/u/9950313?s=60&v=4)](https://app.stepsecurity.io/github/nodejs/node/actions/runs/7591405720) | [![Mastercard](https://avatars.githubusercontent.com/u/1653148?s=60&v=4)](https://app.stepsecurity.io/github/Mastercard/flow/actions/runs/7539664931) |
| --------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |
| **CISA**<br>[Explore](https://app.stepsecurity.io/github/cisagov/skeleton-generic/actions/runs/6199340224) | **Microsoft**<br>[Explore](https://app.stepsecurity.io/github/microsoft/ebpf-for-windows/actions/runs/5559160177) | **Google**<br>[Explore](https://app.stepsecurity.io/github/GoogleCloudPlatform/functions-framework-ruby/actions/runs/5546354505) | **DataDog**<br>[Explore](https://app.stepsecurity.io/github/DataDog/stratus-red-team/actions/runs/5387101451) | **Intel**<br>[Explore](https://app.stepsecurity.io/github/intel/cve-bin-tool/actions/runs/5579910614) | **Kubernetes**<br>[Explore](https://app.stepsecurity.io/github/kubernetes-sigs/cluster-api-provider-azure/actions/runs/5581511101) | **Node.js**<br>[Explore](https://app.stepsecurity.io/github/nodejs/node/actions/runs/5563468674) | **Mastercard**<br>[Explore](https://app.stepsecurity.io/github/Mastercard/flow/actions/runs/5542112873) |
| **CISA**<br>[Explore](https://app.stepsecurity.io/github/cisagov/skeleton-generic/actions/runs/7588528684) | **Microsoft**<br>[Explore](https://app.stepsecurity.io/github/microsoft/ebpf-for-windows/actions/runs/7587031851) | **Google**<br>[Explore](https://app.stepsecurity.io/github/GoogleCloudPlatform/functions-framework-ruby/actions/runs/7576989995) | **DataDog**<br>[Explore](https://app.stepsecurity.io/github/DataDog/stratus-red-team/actions/runs/7446169664) | **Intel**<br>[Explore](https://app.stepsecurity.io/github/intel/cve-bin-tool/actions/runs/7590975903) | **Kubernetes**<br>[Explore](https://app.stepsecurity.io/github/kubernetes-sigs/cluster-api-provider-azure/actions/runs/7591172950) | **Node.js**<br>[Explore](https://app.stepsecurity.io/github/nodejs/node/actions/runs/7591405720) | **Mastercard**<br>[Explore](https://app.stepsecurity.io/github/Mastercard/flow/actions/runs/7539664931) |

## Hands-On Tutorials

Expand All @@ -47,8 +47,8 @@ Harden-Runner monitors process, file, and network activity to:

| | Countermeasure | Prevent Security Breach |
| --- | ----------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1. | Block egress traffic at the DNS (Layer 7) and network layers (Layers 3 and 4) to prevent exfiltration of code and CI/CD credentials | To prevent [Codecov breach](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md) scenario |
| 2. | Detect if source code is being tampered during the build process to inject a backdoor | To detect [SolarWinds incident](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/TamperingDuringBuild.md) scenario |
| 1. | Detect anomalous traffic and block egress traffic at the DNS (Layer 7) and network layers (Layers 3 and 4) to prevent exfiltration of code and CI/CD credentials | To prevent the [Codecov breach](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md) scenario |
| 2. | Detect if source code is being tampered during the build process to inject a backdoor | To detect the [SolarWinds incident](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/TamperingDuringBuild.md) scenario |
| 3. | Detect poisoned workflows and compromised dependencies | To detect [Dependency confusion](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md#dependency-confusion-attacks) and [Malicious dependencies](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md#compromised-dependencies) |

Read this [case study](https://infosecwriteups.com/detecting-malware-packages-in-github-actions-7b93a9985635) on how Harden-Runner detected malicious packages in the NPM registry.
Expand All @@ -57,7 +57,7 @@ Read this [case study](https://infosecwriteups.com/detecting-malware-packages-in

### GitHub-Hosted Runners

1. Add `step-security/harden-runner` GitHub Action to your GitHub Actions workflow file as the first step in each job.
1. Add the `step-security/harden-runner` GitHub Action to your GitHub Actions workflow file as the first step in each job.

```yaml
steps:
Expand All @@ -72,45 +72,45 @@ Read this [case study](https://infosecwriteups.com/detecting-malware-packages-in
<img src="images/buildlog1.png" alt="Link in build log" >
</p>
3. Click on the link ([example link](https://app.stepsecurity.io/github/microsoft/msquic/actions/runs/5577342236)). You will see a process monitor view of network and file events correlated with each step of the job.
3. Click on the link ([example link](https://app.stepsecurity.io/github/microsoft/msquic/actions/runs/7588119198)). You will see a process monitor view of network and file events correlated with each step of the job.
<p align="left">
<img src="images/insights-5.png" alt="Insights from harden-runner" >
</p>
4. Under the insights section, you'll find a Recommended Policy. You can either update your workflow file with this Policy, or alternatively, use the [Policy Store](https://docs.stepsecurity.io/harden-runner/how-tos/block-egress-traffic#2-add-the-policy-using-the-policy-store) to apply the policy without modifying the workflow file.
4. Under the process monitor view, you'll find a recommended block policy based on outbound calls aggregated from the current and past runs of the job. You can update your workflow file with this policy, or alternatively, use the [Policy Store](https://docs.stepsecurity.io/harden-runner/how-tos/block-egress-traffic#2-add-the-policy-using-the-policy-store) to apply the policy without modifying the workflow file. From now on, any outbound calls not in the allowed list will be blocked.
<p align="left">
<img src="images/rec-policy1.png" alt="Policy recommended by harden-runner" >
</p>
### Self-Hosted Actions Runner Controller (ARC) Runners
## Support for Self-Hosted Runners and Private Repositories
> Explore demo workflows using self-hosted ARC Runner and ARC Harden-Runner [here](https://docs.stepsecurity.io/harden-runner/how-tos/enable-runtime-security-arc).
Hardening for self-hosted runners and GitHub-hosted runners used in private repositories is supported with a commercial license. Check out the [documentation](https://docs.stepsecurity.io/stepsecurity-platform/billing) for more details.
Actions Runner Controller (ARC) is a Kubernetes operator that orchestrates and scales self-hosted runners for GitHub Actions.
- To use Harden-Runner in a `Private` repository, you must install the [StepSecurity Actions Security GitHub App](https://github.com/apps/stepsecurity-actions-security).
- This is needed to access the GitHub Actions API and to authenticate users to access the insights URL for private repositories.
- If you use Harden-Runner GitHub Action in a private repository, the generated insights URL is NOT public. Only those who have access to the repository can view it.

- Instead of adding the Harden-Runner GitHub Action in each workflow, you'll need to install the ARC Harden-Runner daemonset on your Kubernetes cluster.
- Upon installation, the ARC Harden-Runner daemonset constantly monitors each workflow run; you do NOT need to add the Harden-Runner GitHub Action to each job for `audit` mode. You do need to add the Harden-Runner GitHub Action for `block` mode.
- You can access security insights and runtime detections under the `Runtime Security` tab in your dashboard.
Read this [case study on how Kapiche uses Harden-Runner](https://www.stepsecurity.io/case-studies/kapiche/) to improve software supply chain security in their private repositories.

### Self-Hosted VM Runners (e.g. on EC2)
### Self-Hosted Actions Runner Controller (ARC) Runners

> Explore demo workflows using self-hosted VM Runners and Harden-Runner [here](https://docs.stepsecurity.io/harden-runner/how-tos/enable-runtime-security-vm).
> Explore demo workflows using self-hosted ARC Runner and ARC Harden-Runner [here](https://docs.stepsecurity.io/harden-runner/how-tos/enable-runtime-security-arc).

- Instead of adding the Harden-Runner GitHub Action in each workflow, you'll need to install the Harden-Runner agent on your runner image (e.g. AMI). This is typically done using packer.
- The Harden-Runner agent monitors each job run on the VM, both ephemeral and persistent runners are supported; you do NOT need to add the Harden-Runner GitHub Action to each job for `audit` mode. You do need to add the Harden-Runner GitHub Action for `block` mode.
- You can access security insights and runtime detections under the `Runtime Security` tab in your dashboard.
Actions Runner Controller (ARC) is a Kubernetes operator that orchestrates self-hosted runners for GitHub Actions.

## Support for Self-Hosted Runners and Private Repositories
- Instead of adding the Harden-Runner GitHub Action in each job, you'll need to install the ARC Harden-Runner daemonset on your Kubernetes cluster.
- Upon installation, the ARC Harden-Runner daemonset monitors all jobs run on the cluster; you do NOT need to add the Harden-Runner GitHub Action to each job for `audit` mode. You do need to add the Harden-Runner GitHub Action to jobs where you want to enable `block` mode.
- Please email support@stepsecurity.io for instructions on how to install the ARC-Harden-Runner daemonset on your Kubernetes cluster.

Runtime security for self-hosted runners and private repositories are supported with a commercial license. Check out the [documentation](https://docs.stepsecurity.io/stepsecurity-platform/billing) for more details.
### Self-Hosted VM Runners (e.g. on EC2)

- Install the [StepSecurity Actions Security GitHub App](https://github.com/apps/stepsecurity-actions-security) to use Harden-Runner GitHub Action for `Private` repositories.
- If you use Harden-Runner GitHub Action in a private repository, the generated insights URL is NOT public.
- You need to authenticate first to access insights URL for private repository. Only those who have access to the repository can view it.
> Explore demo workflows using self-hosted VM Runners and Harden-Runner [here](https://docs.stepsecurity.io/harden-runner/how-tos/enable-runtime-security-vm).

Read this [case study on how Kapiche uses Harden-Runner](https://www.stepsecurity.io/case-studies/kapiche/) to improve software supply chain security in their private repositories.
- Instead of adding the Harden-Runner GitHub Action in each job, you'll need to install the Harden-Runner agent on your runner image (e.g. AMI). This is typically done using packer or as a post-install step when using the https://github.com/philips-labs/terraform-aws-github-runner project to setup runners.
- The Harden-Runner agent monitors all jobs run on the VM, both ephemeral and persistent runners are supported; you do NOT need to add the Harden-Runner GitHub Action to each job for `audit` mode. You do need to add the Harden-Runner GitHub Action to jobs where you want to enable `block` mode.
- Please email support@stepsecurity.io for instructions on how to install the Harden-Runner agent on your self-hosted VM runners. This agent is different than the one used for GitHub-hosted runners.

## Features at a glance

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