# MAL-2026-6760: Malicious code in @adobesign/as-dev-tools (npm)


- **Type:** Malicious package
- **Package:** `@adobesign/as-dev-tools` (npm)
- **Published:** 5 Jul 2026

## What is MAL-2026-6760?

MAL-2026-6760 is a malicious package in @adobesign/as-dev-tools, published on 5 Jul 2026. 

### Official description

The package's package.json declares a postinstall lifecycle hook that pipes the output of `whoami` through curl to a hardcoded Burp Collaborator subdomain (o5u9v30a13fddwo3ey623df59wfn3er3.oastify.com). This fires automatically on `npm install`, leaking the installer's OS username to an attacker-controlled out-of-band callback host. The package is otherwise empty of legitimate content. The combination of the @adobesign scope, an implausible 99.9.9 version, and an out-of-band beacon is the canonical dependency-confusion attack shape: the public package is designed to be resolved in place of an internal Adobe Sign package of the same name, and any build that resolves it will beacon the installer's identity to the attacker.

The OpenSSF Package Analysis project identified '@adobesign/as-dev-tools' @ 99.9.10 (npm) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

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

## What should I do about MAL-2026-6760?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-6760 is a malicious package: @adobesign/as-dev-tools (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-6760/ (Markdown: https://insights.sbomify.com/MAL-2026-6760/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6760

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6760/
Summaries are generated and may contain mistakes; the official description above is the record.