Malicious code in prettier-lint-lenz (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 (28f7035dda69170600724a31f4b3543e02ac23c9153f3a62c35f2ee5264eef44) Package impersonates the popular `prettier` formatter — README and description are copied verbatim from the real Prettier project, but the package ships no formatter code. Instead, `package.json` declares `"postinstall": "node index.mjs"`, which on Windows POSTs an install beacon to a hardcoded bare-IP C2 (`http://204.10.194.64:5000/api/nonce`), copies a bundled `prettier-lint/` directory to `%LOCALAPPDATA%\prettier-lint`, and executes `ctll.mjs` from the deployed location. `ctll.mjs` writes a hidden VBScript runner and registers a Windows Scheduled Task named `CdllProtect` with a LogonTrigger (`schtasks /Create /XML`) that relaunches `cdll.mjs` via `wscript.exe //nologo` in a hidden window on every user logon, with 999 retries and no execution time limit. The deployed `cdll.mjs` polls the clipboard every ~250ms via `powershell.exe Get-Clipboard -Raw` and POSTs the raw clipboard text as JSON to the same hardcoded endpoint over plain HTTP on every change, exfiltrating passwords, 2FA codes, wallet addresses, and any copied text. All three components (install-time beacon, deployed worker, persistence) share the attacker-controlled endpoint `204.10.194.64:5000`. ## Source: ghsa-malware (999f12054e9fb865c3b9176056498b16329b0406f230b1bf23f6a1384d8cd63b) 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 published

14 May 2026 19:25:15 UTC

Source modified

23 Sep 2026 03:45:06 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.