registry / scandoc-scandoc-core / 20.8.5

scandoc-scandoc-core@20.8.5

core runtime

AI Security Review

scanned 12d ago · by lpm-firewall-ai

Importing the package executes a hidden downloader. It fetches a native payload, stores it in temp storage, and runs it detached.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Any Node process that requires the package entrypoint.

Impact

Unconsented arbitrary native code execution under the importing user's privileges.

Mechanism

Import-time remote binary download and detached execution.

Attack narrative

Requiring index.js silently loads _vendor.js. Its start() routine downloads a platform-specific payload from concealed Worker hosts or DNS TXT records, writes it to temporary storage, marks it executable on Unix, and launches it through a detached shell or cmd.exe process.

Rationale

This is a concrete import-time staged-payload execution chain unrelated to the documented core-runtime API. Absence of an install hook does not mitigate execution when consumers import the package.

Evidence

package.jsonindex.js_vendor.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>

Network endpoints7

oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf103-070.workers.dev/pkg/package

On require() of the package, index.js loads _vendor.js which fetches a platform-specific binary from Cloudflare Workers hostnames reconstructed at runtime via array-join string splitting (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT covert-channel fallback under *.dl.well1.site that base64-decodes TXT records from resolveTxt on c.<domain> and N.<domain>. The retrieved bytes are written to /tmp/.cache_<hex> on Unix or Windows TEMP as dotnet_diag_<hex>.exe (disguised as a legitimate.NET diagnostics artifact), chmod 0755, and spawned detached via /bin/sh -c "<path> &" or cmd.exe /c start /b. Execution is gated by DISABLE_TELEMETRY / DO_NOT_TRACK env checks and a /tmp/.analytics_state freshness marker (TTL 21877s) to rate-limit re-execution. A second dropper module lib/telemetry.js ships in the tarball with the same primitives (base64 payload assembly, chmodSync 0755 on extensionPath, cp.spawn('/bin/sh',['-c', filePath+' &'], {detached:true})) and an obfuscated require('child_'+'process') string, cover-storied as an analytics SDK. ## Source: ghsa-malware (75ba088fa0779ff67583ae72d71f409dfb9cbd74d6f62bd38a8f41c76f1a0ff7) 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.

scandoc-scandoc-core@20.8.5

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code