composer

A package-based dependency manager for PHP projects. tldr-pages

GTFOBins shell 1 ATT&CK technique 1 documented command

How composer is abused

documented by GTFOBins

shell T1059.004 Command and Scripting Interpreter: Unix Shell

run-script

Each abuse is GTFOBins's category and the options and words it uses; the full write-up is on GTFOBins's page for composer.

1 documented command

from GTFOBins, each read by the identifier

shell unprivileged, with sudo

echo '{"scripts":{"x":"/bin/sh"}}' >composer.json
composer run-script x

Identify

The command the identifier reads trips no Sigma process-creation rule. This command is from GTFOBins, at commit acd524623f9c of 2026-05-27, under the GPL-3.0, with no warranty. Changed: Markdown is shown formatted. The source is in lolbas-gtfobins-commands.json.gz, and the full entry is on GTFOBins’s page for composer. The identifier reads the line that runs composer.

What detects it

Sigma process creation rules

T1059.004Command and Scripting Interpreter: Unix Shell

Everyday use

from tldr-pages, CC BY 4.0

Interactively create a composer.json file

composer initIdentify

Add a package as a dependency for this project, adding an entry to composer.json

composer require user/packageIdentify

Install all the dependencies in this project's composer.json and create composer.lock

composer installIdentify

None of the 3 examples the identifier reads matches GTFOBins abuse or trips a Sigma process-creation rule.

composer

How composer is abused

1 documented command

What detects it

Everyday use

Other programs abused for shell