Which versions of dac-tools are malicious?

The following PyPI versions of dac-tools are flagged malicious: 999.0.0. Treat any of these as compromised.

How do I remediate dac-tools if I installed it?

dac-tools is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed dac-tools — how do I know if it already compromised me?

If dac-tools was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is dac-tools part of a known attack campaign?

Yes — dac-tools is associated with the GENERIC-standard-pypi-install-pentest, IN-MAL-2026-019663 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find dac-tools across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for dac-tools (version 999.0.0).

Malicious package

dac-toolsPyPI

Advisory published Sep 6, 2026Updated Sep 8, 2026

dac-tools is a confirmed malicious PyPI package (MAL-2026-15938) that steals credentials and exfiltrates sensitive data (malicious version 999.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in dac-tools (PyPI)

MAL-2026-15938

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall dac-tools

What this malware does

On import of dac_tools, the top-level init.py executes whoami and hostname via subprocess, concatenates the results into a DNS label, and triggers socket.getaddrinfo against <label>.depconf-dac.dac2vlrk5gm3aemg9ptgq3kye1ky9kd4e.p.0xy.us, causing the installer's OS username and hostname to be transmitted to an attacker-controlled authoritative DNS server on every import. A second beacon in CDHApiClient.get_project_credentials_with_client_credentials performs a DNS lookup to cdh-intercept.depconf-dac.dac2vlrk5gm3aemg9ptgq3kye1ky9kd4e.p.0xy.us and returns fabricated AWS credentials, mimicking an internal cdh_api_client API surface so that any caller invoking the shim signals the attacker. The package name shadows an internal dependency and is published at version 999.0.0 to win resolution against the internal package - the canonical dependency-confusion shape.

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
The package overrides the install command in setup.py to execute malicious code during installation.

The OpenSSF Package Analysis project identified 'dac-tools' @ 999.0.0 (pypi) as malicious.

It is considered malicious because:

The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

999.0.0

Indicators of compromise (SHA-256)

21c38f5fc2ee894120161023d576dd3d54bb373ab89baa04b1d1ed8c54b7a1c3

fced1eb56b721b98d444549899dd7cd86f36478adc0ed132c99b601155c6331f

203490886d6928aee2c8d681d282f53d8513907b30be5e5e20fe1effb5fd21d2

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for dac-tools (version 999.0.0).
If you installed it — respond
dac-tools is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If dac-tools was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. dac-tools on PyPI has been identified as a malicious package (version 999.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentestIN-MAL-2026-019663

References

Credits

Amazon Inspector · finder
Kamil Mańkowski (kam193) · reporter
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks dac-tools-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database