Malicious code in uolcs-host-uol-anuncios-fe (npm)

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (16d9407c815fe2d5593da029ee806d455d15f451d1c84d3cd8d6a0a027821d64) Package claims an internal-scope corporate name (`uolcs-host-uol-anuncios-fe`) on public npm, version-pinned to 99.99.99 — the canonical dependency-confusion shape designed to win resolution against an internal package of the same name in a target organization's CI. Both `preinstall` and `postinstall` hooks in package.json invoke `node./callback.js`, which reads `os.hostname()` and `os.platform()`, embeds them as a subdomain label (`uolci-<hostname>-<platform>.d86r3dv5vn81lvohffp0131g8kdx9mz3c.oast.pro`), and issues a DNS A lookup. The destination `oast.pro` is the interactsh out-of-band interaction listener; the DNS query itself is the exfiltration channel, capturing the installer's hostname and OS at the listener owned by whoever controls that token. The README's claim of authorized research is not verifiable from package contents and does not change the installer-side effect: any CI host or developer machine that resolves this name from public npm leaks identity to a third party on `npm install`. ## Source: ghsa-malware (4fd31f4923aebf7f279015355f15155d0e3c3aa342a9db399eedb8c2770b4d7d) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it. ## Source: ossf-package-analysis (460c859985a6f675c559fa18b353ab35f370e5f1f60c9da53275358a1fdbaa29) The OpenSSF Package Analysis project identified 'uolcs-host-uol-anuncios-fe' @ 99.99.99 (npm) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity.

Source published

20 May 2026 16:06:01 UTC

Source modified

23 Sep 2026 03:45:05 UTC

Saved here

24 Oct 2026 13:17:17 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.