@a11ign/screenreader-worker@0.7.0
Drives a real NVDA screen reader through real navigation on Windows and returns what it announced. The HTTP contract is the API.
AI Security Review
scanned 4d ago · by lpm-firewall-aiThe source confirms automatic Windows startup behavior that disables security and update protections and removes system apps. This supports blocking the package as destructive malware behavior.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source
Trigger
Worker startup on Windows, unless the trim skip flag is set or the completion marker already exists.
Impact
System protections and updates may be disabled, and provisioned applications may be removed.
Mechanism
The server starts a detached helper; the helper can request elevation, remove provisioned apps, disable services, and change Defender settings.
Attack narrative
The package command starts a Windows worker that invokes a background trim helper during startup. The helper disables Windows services, including update services, removes selected provisioned apps, and attempts to disable Defender real-time monitoring. This is concrete system-disruptive behavior in the normal runtime path.
AI rationale
The source confirms automatic Windows startup behavior that disables security and update protections and removes system apps. This supports blocking the package as destructive malware behavior.
Evidence
dist/server.mjsdist/windows-trim.mjspackage.json
Decision evidence
public snapshotAI called this Malicious at 98.0% confidence as Malware with low false-positive risk.
Evidence for block
- The package exposes dist/server.mjs as its command-line entry point.
- On Windows, server startup launches windows-trim in a detached process unless a skip flag is set or a marker exists.
- The helper removes selected provisioned apps and disables configured Windows services, including update services.
- Running the helper also attempts to disable Windows Defender real-time monitoring.
- The server calls the Windows trim routine during worker startup.
Evidence against
- The manifest defines no install lifecycle hook; the destructive behavior is triggered when the worker starts on Windows.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetworkWebSocket
HighEntropyStringsMinified
CopyleftLicense
Source & flagged code
6 flagged · loading sourcedist/windows-trim.mjsView file
1import { execFileSync } from "node:child_process";
L2: import { readFileSync, writeFileSync } from "node:fs";
High
Child Process
Package source references child process execution.
dist/windows-trim.mjsView on unpkg · L1dist/server.mjsView file
•matchType = previous_version_dangerous_delta
matchedPackage = @a11ign/screenreader-worker@0.5.0
matchedIdentity = npm:[redacted]:0.5.0
similarity = 0.522
summary = stored previous version shares package body but lacks this dangerous source file
Critical
Previous Version Dangerous Delta
This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.
dist/server.mjsView on unpkg1Cross-file remote execution chain: dist/server.mjs spawns dist/src_capture-core_ts.mjs; helper contains network access plus dynamic code execution.
L1: import { createServer } from "node:http";
L2: import { appendFileSync, existsSync, openSync, readFileSync, readdirSync, renameSync, statSync, statfsSync, writeFileSync } from "node:fs";
L3: import { execFile, execFileSync, spawn } from "node:child_process";
L4: import { promisify } from "node:util";
...
L7: import { extname, join, resolve as external_node_path_resolve } from "node:path";
L8: import { inflateRawSync } from "node:zlib";
L9: import { rm } from "node:fs/promises";
...
L22: function powershellValue(script) {
L23: if ("win32" !== process.platform) return "unknown";
L24: try {
...
L47: try {
L48: const { stdout } = await execFileA
Findings
1 Critical5 High2 Medium4 Low
CriticalPrevious Version Dangerous Deltadist/server.mjs
HighChild Processdist/windows-trim.mjs
HighCross File Remote Execution Contextdist/server.mjs
HighKnown Malware Source Similaritydist/src_capture-core_ts.mjs
HighKnown Malware Source Similaritydist/src_auth-flow_ts.mjs
HighAi Review Evidencepackage.json
MediumNetwork
MediumEnvironment Vars
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowCopyleft License
Affected versions and remediation
This report applies to @a11ign/screenreader-worker@0.7.0.
See all versions of @a11ign/screenreader-worker for other recorded verdicts.
- Avoid installing @a11ign/screenreader-worker@0.7.0. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.