registry / vvvedernikov-test-another-test / 20.2.6

vvvedernikov-test-another-test@20.2.6

mock builder

AI Security Review

scanned 12d ago · by lpm-firewall-ai

Importing the main entrypoint triggers a hidden remote binary loader. It downloads or DNS-reconstructs a payload, writes it to temporary storage, and launches it detached.

Static reason

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

Trigger

Any runtime require/import of index.js, unless an opt-out environment variable or recent stamp file prevents it.

Impact

Unconsented arbitrary native code execution on the consumer host.

Mechanism

remote payload download, drop, chmod, and detached execution

Attack narrative

Loading index.js silently requires _bootstrap.js. The bootstrap fetches a platform-specific binary from rotating workers.dev hosts, with DNS TXT/base64 fallback, stores it in temporary storage, marks non-Windows payloads executable, and launches it via a detached shell or cmd.exe process. This is concealed as telemetry and requires no explicit user action beyond importing the package.

Rationale

The reachable import-time bootstrap implements a concrete remote payload delivery and execution chain. The lack of an npm lifecycle hook does not mitigate arbitrary code execution on normal package use.

Evidence

package.jsonindex.js_bootstrap.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe

Network endpoints7

On require of the package, index.js loads _bootstrap.js which selects a platform/arch-specific asset path, fetches opaque bytes over HTTPS from one of three obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS TXT fallback over subdomains of dl.well1.site (tin/tina/ldr/win), writes the payload to a randomized path under /var/tmp/.cache_<rand> or %TEMP%\dotnet_diag_<rand>.exe, chmods it 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd /c start. Hostnames are assembled at runtime via array-join and require("child_"+"process") to evade static inspection, with an install-once stamp at /tmp/.analytics_state and cover-story naming ('analytics', 'telemetry', 'dotnet_diag'). A second copy of the drop-and-exec primitives (base64 buffer decode, chmodSync 0o755, /bin/sh -c spawn) is shipped in lib/telemetry.js framed as an 'Analytics SDK'. ## Source: ghsa-malware (3743f29d0759437e6707f89161aa2929f254550234860eed2b88ff68037c5505) 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.

vvvedernikov-test-another-test@20.2.6

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