Git Hook Created or Modified

Last updated 5 days ago on 2024-09-23
Created 3 months ago on 2024-06-26

About

This rule detects the creation or modification of a Git hook file on a Linux system. Git hooks are scripts that Git executes before or after events such as commit, push, and receive. They are used to automate tasks, enforce policies, and customize Git's behavior. Attackers can abuse Git hooks to maintain persistence on a system by executing malicious code whenever a specific Git event occurs.
Tags
Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: PersistenceTactic: ExecutionTactic: Defense EvasionData Source: Elastic Defend
Severity
low
Risk Score
21
MITRE ATT&CK™

Persistence (TA0003)(opens in a new tab or window)

Execution (TA0002)(opens in a new tab or window)

Defense Evasion (TA0005)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.file*
Related Integrations

endpoint(opens in a new tab or window)

Query
file where host.os.type == "linux" and event.type == "creation" and file.path : "*.git/hooks/*" and
file.extension == null and process.executable != null and not (
  process.executable in (
    "/bin/dpkg", "/usr/bin/dpkg", "/bin/dockerd", "/usr/bin/dockerd", "/usr/sbin/dockerd", "/bin/microdnf",
    "/usr/bin/microdnf", "/bin/rpm", "/usr/bin/rpm", "/bin/snapd", "/usr/bin/snapd", "/bin/yum", "/usr/bin/yum",
    "/bin/dnf", "/usr/bin/dnf", "/bin/podman", "/usr/bin/podman", "/bin/dnf-automatic", "/usr/bin/dnf-automatic",
    "/bin/pacman", "/usr/bin/pacman", "/usr/bin/dpkg-divert", "/bin/dpkg-divert", "/sbin/apk", "/usr/sbin/apk",
    "/usr/local/sbin/apk", "/usr/bin/apt", "/usr/sbin/pacman", "/bin/podman", "/usr/bin/podman", "/usr/bin/puppet",
    "/bin/puppet", "/opt/puppetlabs/puppet/bin/puppet", "/usr/bin/chef-client", "/bin/chef-client",
    "/bin/autossl_check", "/usr/bin/autossl_check", "/proc/self/exe", "/usr/bin/pamac-daemon", "/bin/pamac-daemon",
    "/usr/local/bin/dockerd", "/sbin/dockerd"
  ) or
  process.executable : ("/nix/store/*", "/var/lib/dpkg/*", "/snap/*", "/dev/fd/*") or
  process.name in ("git", "dirname") or
  (process.name == "sed" and file.name : "sed*") or
  (process.name == "perl" and file.name : "e2scrub_all.tmp*") 
)

Install detection rules in Elastic Security

Detect Git Hook Created or Modified in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).