registry / Malware / web-advertising

web-advertising

This report shows the evidence for web-advertising@999.9.16. 2 of 2 known versions are blocked or flagged. See all versions.

This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.

OpenSSF/OSV Malicious Advisory

imported 2mo ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-14440 confirms this npm version as malicious.

Advisory

MAL-2026-14440

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in web-advertising (npm)

Details

web-advertising@999.9.16 declares scripts.preinstall = 'node index.js', so index.js executes automatically on npm install. The script collects hostname, username, home directory, local/public/resolver IP addresses, CI environment identifiers (GITHUB_REPOSITORY, GITHUB_ACTOR, CI_PROJECT_PATH, AWS_REGION), the parent project's package.json name/author/repo, and authenticated developer identities obtained by shelling out to `gh api user --jq.login`, `npm whoami`, and `git config user.email`. The collected JSON is hex-encoded, split into 60-character chunks, and exfiltrated via DNS subdomain queries to da51rv0hb2uc72tg4gvgdepinjcallbk1.oast.fun and via HTTPS/HTTP POST to the same callback host. The package name plus 999.9.16 versioning and the OAST callback are consistent with a dependency-confusion beacon. The README's self-description as authorised research does not change the observed behavior: installer host, CI, and identity data leave the machine to an author-controlled third-party callback with no installer consent, and DNS tunneling is used to bypass egress filtering.

References

OpenSSF/OSV advisory PACKAGE PACKAGE

Source & flagged code

0 flagged

No flagged code excerpts are attached to this scan.

Findings

1 High

HighOsv Malicious Advisory

Affected versions and remediation

This report applies to web-advertising@999.9.16.

The same advisory and Firewall decision cover 2 recorded versions

999.9.15, 999.9.16

The versions list below shows the verdict for each recorded version.

Avoid installing web-advertising@999.9.16. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-08-24 17:00:14.926Z (UTC).

Source advisory published: 2026-08-24 16:38:53.000Z (UTC).

This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

2 known versions

999.9.16latestshownMaliciousMalwareBlockPublishedAug 24, 2026, 1:46 PM 999.9.15MaliciousMalwareBlockPublishedAug 24, 2026, 1:46 PM

OpenSSF/OSV Malicious Advisory

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other malware packages

Related packages

Other malware packages