Falco Probes

This project automates the building and mirroring of eBPF kernel probes for use by Falco as an eBPF probe driver to consume system call information which feeds its runtime threat detection abilities.

Features

Falco Security provide falcosecurity/driverkit for building Falco drivers and download.falco.org/driver which mirrors only Falco kernel module drivers built from falcosecurity/test-infra. This didn't quite meet all of our requirements, thus the birth of this project with the following features:

• Falco eBPF probe drivers are built and available to download.
• Mirrored Falco eBPF probe driver hashes do not change as we only upload probes once.
• Probes for new kernel versions are automatically built as we dynamically obtain a list of available kernel versions at build time.

Getting Started

This project mirrors built Falco eBPF probes to GitHub releases, where they are organised per Falco Driver Version (see docs/REPOSITORY_DESIGN.md for more information.).

To obtain an eBPF kernel probe, you can:

1. Determine the Falco Driver version that your version of Falco is using:

   FALCO_VERSION=0.29.1
   docker run --rm --entrypoint="" \
   docker.io/falcosecurity/falco:$FALCO_VERSION \
   cat /usr/bin/falco-driver-loader \
   | grep DRIVER_VERSION= \
   | cut -f2 -d\"
   # 17f5df52a7d9ed6bb12d3b1768460def8439936d

2. Go to the Releases and find the name which matches your Falco Driver Version. You can then download the eBPF probes you want from there.

Below is a scripted example to download probes:

FALCO_VERSION=0.29.1
PROBE_NAME="falco_amazonlinux2_4.14.232-177.418.amzn2.x86_64_1.o"

FALCO_DRIVER_VERSION=$(docker run --rm --entrypoint="" "docker.io/falcosecurity/falco:${FALCO_VERSION}" cat /usr/bin/falco-driver-loader | grep DRIVER_VERSION= | cut -f2 -d\")
# truncate driver version to 8 characters to get the release tag.
RELEASE_TAG=$(printf "%.8s\n" "${FALCO_DRIVER_VERSION}")

curl -LO "https://github.com/thought-machine/falco-probes/releases/download/${RELEASE_TAG}/${PROBE_NAME}"

Supported Operating Systems

• Amazon Linux 2 (amazonlinux2)
• Google Container-Optimized OS (cos)

Roadmap

We're not currently planning on supporting other distributions, but we're open to pull requests.

See CONTRIBUTING.md for how to add support for additional operating systems.

Contact

To contact us, open a ticket in GitHub Issues Project Link: https://github.com/thought-machine/falco-probes