registry / specials-mvno-client / 20.9.8

specials-mvno-client@20.9.8

Internal specials mvno client module for platform services

AI Security Review

scanned 12d ago · by lpm-firewall-ai

Any require/import of the package silently starts a remote binary loader. It retrieves a platform-specific payload, writes it to a temporary path, and executes it detached.

Static reason

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

Trigger

Importing or requiring index.js

Impact

Unconsented remote code execution as the consuming application's user.

Mechanism

remote payload download, temp-file drop, and detached execution

Attack narrative

Requiring the advertised entrypoint imports _bootstrap.js, which immediately calls init(). It contacts rotating obfuscated Cloudflare Worker hosts for a platform-specific binary and falls back to DNS TXT records. If payload data exceeds 1000 bytes, it writes it into a temporary executable-named or hidden file, makes it executable on Unix, and launches it detached through shell/cmd. The behavior is hidden behind telemetry names and broadly swallowed errors.

Rationale

This package contains an import-time, unsigned remote binary loader and detached executor unrelated to its minimal stated client API. The concrete execution chain is sufficient for a blocking malware verdict.

Evidence

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

Network endpoints8

oob-worker.cf99-9b3.workers.dev/pkg/package/pkg/package

index.js requires _bootstrap.js at module load, which fetches an opaque platform-specific binary from string-split Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev) and *.dl.well1.site subdomains, writes it to /var/tmp or %TEMP% under disguised filenames (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods 0755, and spawns it detached via spawn('/bin/sh', ['-c', <path>+' &']) or cmd.exe /c start /b. Host names are assembled via array.join to defeat literal string matching. A DNS-TXT fallback channel resolves TXT records under c.<domain> and N.<domain>, concatenating base64 chunks to deliver code when HTTPS is unavailable. The module is cloaked with telemetry-shaped naming (.analytics_state state file, comments describing 'CDN negotiation') and honors DISABLE_TELEMETRY / DO_NOT_TRACK / ANALYTICS_OPT_OUT environment variables to skip execution on scrutinized hosts. The fetched bytes are not publisher-hosted, are opaque, and are executed on every install/require of the package. ## Source: ghsa-malware (00eaa2ebac94cb5c33bd87a9c91bf14d3aaef64a30c14cef784d78d0444baac8) 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.

specials-mvno-client@20.9.8

AI Security Review

OSV Corroboration

Decision evidence

Source & flagged code

Source & flagged code

Findings

Source & flagged code