registry / Install hook abuse / aws-runtime-bridge / 1.9.125

aws-runtime-bridge@1.9.125

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AgentsWorkStudio runtime bridge service for machine-level agent runtime integration

AI Security Review

scanned 29d ago · by lpm-firewall-ai

The package has concrete install-hook abuse risk because root installation automatically mutates the operating system and downloads browser software. The inspected hooks contain opt-outs and package-aligned setup, but automatic privileged changes warrant a warning.

Static reason

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

Trigger

Installing the package; the build-tools action activates only on Linux as root when required tools are absent, while the browser action runs unless opted out.

Impact

An installation performed as root can update package indexes and install system packages or browser dependencies without a separate user command.

Mechanism

Preinstall executes selected operating-system package-manager commands; postinstall executes the Playwright CLI to download Chromium and may install its system dependencies.

AI rationale

Evidence

package.jsonscripts/ensure-build-tools.mjsscripts/ensure-playwright-browser.mjs

Network endpoints1

npmmirror.com/mirrors/playwright

Decision evidence

public snapshot

AI called this Suspicious at 90.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

The package declares automatic preinstall and postinstall hooks.
On Linux as root, preinstall selects a system package manager and runs its update and install commands for build tools.
Postinstall automatically invokes Playwright to install Chromium and, as root on Linux, requests system dependencies too.

Evidence against

The build-tool hook is limited to Linux with missing tools and skips when its opt-out variable is set.
The browser installer uses the bundled Playwright CLI and exposes an opt-out variable; no credential collection or unrelated endpoint was found in the inspected hooks.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShellWebSocket

Supply chain

HighEntropyStringsMinifiedPossibleObfuscationUrlStrings

Source & flagged code

28 flagged

package.jsonView file

•scripts.preinstall = node scripts/ensure-build-tools.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/ensure-bin-executable.mjs && node scripts/ensure-playwright-browser.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/index.jsView file

1#!/usr/bin/env node L2: import{existsSync as A,readFileSync as T}from"node:fs";import B from"node:os";import D from"node:path";import M from"cors";import R from"express";import{adapterRegistry as E}from".... L3:

High

Child Process

Package source references child process execution.

dist/index.jsView on unpkg · L1

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/index.jsView on unpkg · L1

dist/remote-desktop/ui-automation.jsView file

1import{exec as m}from"node:child_process";import{promisify as c}from"node:util";const r=c(m);class h{async listApplications(){return process.platform==="win32"?this.listAppsWindows... L2: `).filter(Boolean).map(o=>{const e=o.split(" "),[s,d,l,p]=e,i=p?p.split(",").map(Number):[];return{pid:Number(s)||0,name:d||"",isForeground:!1,windowTitle:l||void 0,windowBounds:i....

High

Shell

Package source references shell execution.

dist/remote-desktop/ui-automation.jsView on unpkg · L1

dist/routes/instance.jsView file

1import{Router as H}from"express";import A from"axios";import{spawn as E}from"node:child_process";import{createHash as W,timingSafeEqual as G}from"node:crypto";import{fileURLToPath ... L2:

Low

Weak Crypto

Package source references weak cryptographic algorithms.

dist/routes/instance.jsView on unpkg · L1

dist/services/cli-commands.jsView file

1Trigger-reachable persistence chain: scripts.start -> dist/index.js -> dist/services/cli-commands.js L1: import{spawnSync as g}from"node:child_process";import{createInterface as X}from"node:readline/promises";import{existsSync as h,mkdirSync as I,readFileSync as Z,rmSync as ee,unlinkS... L2: `)}function le(e){process.stderr.write(`${e} ... L5: `)}function b(e,r){return e("systemctl",r)}function C(e,r){return r.error?`[runtime-bridge] ${e}\u5931\u8D25: ${r.error.message}`:`[runtime-bridge] ${e}\u5931\u8D25\uFF0Csystemctl ... L6: npm install -g aws-runtime-bridge`),{handled:!0,exitCode:1}}async function O(e){const r=e.windowsServiceManager;if(!r&&!ie())return ve(e.stderr);const t=e.windowsServiceLogPath||B,... L7:

High

Trigger Reachable Persistence

A manifest entrypoint or package-local install chain reaches persistence behavior.

dist/services/cli-commands.jsView on unpkg · L1

1import{spawnSync as g}from"node:child_process";import{createInterface as X}from"node:readline/promises";import{existsSync as h,mkdirSync as I,readFileSync as Z,rmSync as ee,unlinkS... L2: `)}function le(e){process.stderr.write(`${e} ... L5: `)}function b(e,r){return e("systemctl",r)}function C(e,r){return r.error?`[runtime-bridge] ${e}\u5931\u8D25: ${r.error.message}`:`[runtime-bridge] ${e}\u5931\u8D25\uFF0Csystemctl ... L6: npm install -g aws-runtime-bridge`),{handled:!0,exitCode:1}}async function O(e){const r=e.windowsServiceManager;if(!r&&!ie())return ve(e.stderr);const t=e.windowsServiceLogPath||B,... L7:

Medium

Install Persistence

Source writes installer persistence such as shell profile or service configuration.

dist/services/cli-commands.jsView on unpkg · L1

dist/adapter/OpencodeSdkAdapter.jsView file

1import{spawn as E}from"node:child_process";import{EventEmitter as x}from"node:events";import*as w from"node:fs";import*as T from"node:net";import*as O from"node:os";import*as h fro... L2: `)):t}return this.sdkModule}async waitForServer(t,e,o,r){const i=Date.now()+o;for(;Date.now()<i;){try{if((await t.session.list({query:{directory:e}})).data!==void 0)return}catch{}a...

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/adapter/OpencodeSdkAdapter.jsView on unpkg · L1

scripts/ensure-playwright-browser.mjsView file

20*/ L21: import { execFile, spawnSync } from "node:child_process"; L22: import { createRequire } from "node:module"; ... L34: try { L35: const packageJsonPath = require.resolve("playwright/package.json"); L36: return join(dirname(packageJsonPath), "cli.js"); ... L49: encoding: "utf-8", L50: shell: process.platform === "win32", L51: stdio: ["ignore", "pipe", "ignore"], L52: }); L53: if (result.status === 0 && result.stdout) { L54: const url = result.stdout.trim();

High

Sandbox Evasion Gated Capability

Source gates dangerous network, credential, or execution behavior behind CI, host, platform, time, or geo fingerprint checks.

scripts/ensure-playwright-browser.mjsView on unpkg · L20

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = scripts/ensure-playwright-browser.mjs matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

scripts/ensure-playwright-browser.mjsView on unpkg

node_modules/playwright/lib/common/index.jsView file

65getFromCompilationCache: () => getFromCompilationCache, L66: getUserData: () => getUserData, L67: installSourceMapSupport: () => installSourceMapSupport, ... L80: var { calculateSha1 } = require("playwright-core/lib/coreBundle").utils; L81: var cacheDir = process.env.PWTEST_CACHE_DIR || (() => { L82: if (process.platform === "win32") L83: return import_path.default.join(import_os.default.tmpdir(), `playwright-transform-cache`); ... L100: return { L101: map: JSON.parse(import_fs.default.readFileSync(sourceMapPath, "utf-8")), L102: url: source ... L407: return file2; L408: return import_path2.default.relative(process.cwd(), file2);

High

Obfuscated Payload Loader

Source contains an obfuscated payload loader that reconstructs and executes hidden code.

node_modules/playwright/lib/common/index.jsView on unpkg · L65

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright/lib/common/index.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/common/index.jsView on unpkg

node_modules/playwright-core/lib/vite/traceViewer/assets/codeMirrorModule-By56iMx7.jsView file

7contains invisible/control Unicode U+200B (zero width space) height: `+(r-t)+`px`))}function d(t,n,r){var a=K(i,t),o=a.text.length,d,f;function p(n,r){return wr(e,J(t,n),`div`,a,r)}function m(t,n,r){var i=Ar(e,a,null,t),o=n==`ltr`==(r==`after`)?`left`:`right`;return p(r==

Critical

Trojan Source Unicode

Source contains bidi control or invisible Unicode characters associated with Trojan Source attacks.

node_modules/playwright-core/lib/vite/traceViewer/assets/codeMirrorModule-By56iMx7.jsView on unpkg · L7

node_modules/playwright-core/lib/coreBundle.jsView file

470Cross-file remote execution chain: node_modules/playwright-core/lib/coreBundle.js spawns node_modules/playwright-core/lib/vite/traceViewer/sw.bundle.js; helper contains network access plus dynamic code execution. L470: L471: // packages/isomorphic/base64.ts L472: function base64ByteLength(data) { ... L587: } L588: return { data: Buffer.from(buffer), width: size.width, height: size.height }; L589: } ... L3829: ["BrowserContext.setNetworkInterceptionPatterns", { title: "Route requests", group: "route" }], L3830: ["BrowserContext.[redacted]", { title: "Route WebSockets", group: "route" }], L3831: ["BrowserContext.setOffline", { title: "Set offline mode" }], ... L5592: } L5593: case "stdout": { L5594: contextEntry.stdio.push(event);

High

Cross File Remote Execution Context

Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking.

node_modules/playwright-core/lib/coreBundle.jsView on unpkg · L470

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright-core/lib/coreBundle.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright-core/lib/coreBundle.jsView on unpkg

package/acode/dist/grammars/grammars/tree-sitter-go.wasmView file

•path = [redacted]-sitter-go.wasm kind = wasm_module sizeBytes = 217182 magicHex = [redacted]

Medium

Ships Wasm Module

Package ships WebAssembly modules.

package/acode/dist/grammars/grammars/tree-sitter-go.wasmView on unpkg

node_modules/playwright-core/bin/reinstall_msedge_dev_win.ps1View file

•path = node_modules/playwright-core/bin/reinstall_msedge_dev_win.ps1 kind = build_helper sizeBytes = 869 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

node_modules/playwright-core/bin/reinstall_msedge_dev_win.ps1View on unpkg

dist/remote-desktop/system-backend.js#virtual:string-array:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 8

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/remote-desktop/system-backend.js#virtual:string-array:round1View on unpkg

node_modules/playwright/lib/runner/index.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright/lib/runner/index.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/runner/index.jsView on unpkg

node_modules/playwright-core/lib/utilsBundle.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright-core/lib/utilsBundle.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright-core/lib/utilsBundle.jsView on unpkg

dist/services/tool-installer.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = dist/services/tool-installer.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/services/tool-installer.jsView on unpkg

node_modules/playwright-core/lib/tools/cli-client/channelSessions.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright-core/lib/tools/cli-client/channelSessions.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright-core/lib/tools/cli-client/channelSessions.jsView on unpkg

node_modules/playwright/lib/agents/generateAgents.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules[redacted].js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/agents/generateAgents.jsView on unpkg

node_modules/playwright/lib/cli/testActions.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright/lib/cli/testActions.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/cli/testActions.jsView on unpkg

node_modules/playwright/lib/index.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright/lib/index.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/index.jsView on unpkg

node_modules/playwright/lib/mcp/test/testContext.jsView file

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/mcp/test/testContext.jsView on unpkg

node_modules/playwright/lib/util.jsView file

•matchType = normalized_sha256 matchedPackage = aws-runtime-bridge@1.9.153 matchedPath = node_modules/playwright/lib/util.js matchedIdentity = npm:YXdzLXJ1bnRpbWUtYnJpZGdl:1.9.153 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

node_modules/playwright/lib/util.jsView on unpkg

Source & flagged code

28 flagged · loading source

package.jsonView file

•scripts.preinstall = node scripts/ensure-build-tools.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/ensure-bin-executable.mjs && node scripts/ensure-playwright-browser.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/index.jsView file

High

Child Process

Package source references child process execution.

dist/index.jsView on unpkg · L1

Findings

1 Critical21 High8 Medium7 Low

CriticalTrojan Source Unicodenode_modules/playwright-core/lib/vite/traceViewer/assets/codeMirrorModule-By56iMx7.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/index.js

HighShelldist/remote-desktop/ui-automation.js

HighSame File Env Network Executiondist/adapter/OpencodeSdkAdapter.js

HighSandbox Evasion Gated Capabilityscripts/ensure-playwright-browser.mjs

HighObfuscated Payload Loadernode_modules/playwright/lib/common/index.js

HighCross File Remote Execution Contextnode_modules/playwright-core/lib/coreBundle.js

HighTrigger Reachable Persistencedist/services/cli-commands.js

HighSemantic Analysis Limiteddist/remote-desktop/system-backend.js#virtual:string-array:round1

Affected versions and remediation

This report applies to aws-runtime-bridge@1.9.125.

See all versions of aws-runtime-bridge for other recorded verdicts.

Review the evidence and your use of aws-runtime-bridge@1.9.125 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-09-23 22:38:32.635Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.