@a11ign/screenreader-worker@0.5.2
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 14d ago · by lpm-firewall-aiThe startup path performs broad system changes and attempts to disable antivirus protection, with automatic privilege escalation. This is concrete destructive behavior and warrants blocking publication.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review
Trigger
Starting the a11ign-nvda-worker CLI on Windows, unless the skip flag is set or a trim marker already exists.
Impact
Changes system applications and services and attempts to reduce antivirus protection.
Mechanism
The server launches windows-trim.mjs in the background; the helper performs system changes and requests an elevated scheduled task when not already elevated.
Attack narrative
When launched on Windows, the CLI starts the trim helper during server startup. The helper removes provisioned apps, disables selected services, and attempts to disable Defender real-time monitoring. If it lacks elevation, it attempts to register and run an elevated scheduled task, making these system changes without a separate setup command.
AI rationale
The startup path performs broad system changes and attempts to disable antivirus protection, with automatic privilege escalation. This is concrete destructive behavior and warrants blocking publication.
Evidence
dist/server.mjsdist/windows-trim.mjs.windows-trimmed.windows-trimmed.log.windows-trimmed.json
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- The CLI entrypoint is dist/server.mjs.
- On Windows, startup launches the trim helper unless the skip flag is set or a marker exists.
- The helper removes provisioned applications and disables selected Windows services.
- The helper also attempts to disable Defender real-time monitoring.
- The helper can request an elevated scheduled task to run its changes.
Evidence against
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
1Cross-file remote execution chain: dist/server.mjs spawns dist/src_capture-core_mjs.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 { 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 execFileAsync("po
High
Cross File Remote Execution Context
Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking.
dist/server.mjsView on unpkg · L1Findings
6 High2 Medium4 Low
HighChild Processdist/windows-trim.mjs
HighCross File Remote Execution Contextdist/server.mjs
HighKnown Malware Source Similaritydist/server.mjs
HighKnown Malware Source Similaritydist/src_capture-core_mjs.mjs
HighKnown Malware Source Similaritydist/src_auth-flow_mjs.mjs
HighKnown Malware Source Fingerprint Signaturedist/server.mjs
MediumNetwork
MediumEnvironment Vars
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowCopyleft License
Affected versions and remediation
This report applies to @a11ign/screenreader-worker@0.5.2.
See all versions of @a11ign/screenreader-worker for other recorded verdicts.
- Avoid installing @a11ign/screenreader-worker@0.5.2. 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: .
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