beast-agent@2.81.0

Ultra-fast local agent shell for Windows.

AI Security Review

scanned 4d ago · by lpm-firewall-ai

The scanner's similarity labels do not establish malicious behavior, and the postinstall hook repairs the package's Electron runtime. The Discord TLS fallback presents a real conditional credential exposure risk, so this warrants a warning rather than a block.

Static reason

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

Trigger

A certificate error occurs during a Discord REST or gateway connection.

Impact

An intermediary able to present an untrusted certificate could read the bot token and potentially act through that Discord bot.

Mechanism

The shared TLS flag is enabled, and subsequent HTTPS and WebSocket connections accept unverified certificates while the REST request carries the bot token.

AI rationale

Evidence

src/agent/discord.jssrc/main.js

Network endpoints2

discord.com/api/v10wss://gateway.discord.gg/?v=10&encoding=json

Decision evidence

public snapshot

AI called this Suspicious at 86.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The postinstall hook runs a local Electron repair script that invokes Electron's installer and may use a mirror.
The Discord token is supplied through the settings interface, and the bridge starts when that setting is present.
The bridge sends the token to fixed Discord REST and gateway endpoints.
A Discord certificate error sets a shared flag that disables certificate verification for REST and gateway connections.
The engine reads workspace instruction files into its prompt, while the Discord bridge forwards incoming messages to its callback.

Evidence against

The inspected code does not send the token to an unrelated collector; the risk is conditional exposure if a network intermediary presents an untrusted certificate.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShellWebSocket

Supply chain

Source & flagged code

27 flagged

package.jsonView file

•scripts.postinstall = node scripts/fix-electron.js --soft

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/fix-electron.js --soft

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

bin/beast-agent.jsView file

Lines 1-40javascript

1#!/usr/bin/env node

2'use strict';

4/* Beast Agent global npm launcher (`beast` short alias points to the same script):

5 `beast` / `beast-agent` → launches the app detached, frees the terminal immediately

6 `beast update` → installs the latest version from npm (run while the app is closed) */

8const { spawn, spawnSync } = require('child_process');

9const path = require('path');

High

Child Process

Package source references child process execution.

bin/beast-agent.jsView on unpkg · L7

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/beast-agent.jsView on unpkg · L7

10const fs = require('fs');

11const os = require('os');

13/* uninstall mode: removes the app but KEEPS YOUR PERSONAL DATA

14 (%APPDATA%\beast: config.yaml, .env, sessions, memory, WhatsApp pairing, backups) */

15if (process.argv[2] === 'uninstall') {

16 const isWin = process.platform === 'win32';

17 console.log('Uninstalling Beast Agent\u2026');

18 if (isWin) {

19 /* stop running instances */

20 try {

21 spawnSync('powershell.exe', ['-NoProfile', '-Command',

22 "Get-Process electron -ErrorAction SilentlyContinue | Where-Object { $_.Path -like '*node_modules*beast-agent*' } | Stop-Process -Force"],

High

Shell

Package source references shell execution.

bin/beast-agent.jsView on unpkg · L20

23 { stdio: 'ignore' });

24 console.log('\u2022 stopped running Beast instances (if any)');

25 } catch {}

26 /* remove the startup entry — only if it points to beast-agent */

27 try {

28 spawnSync('powershell.exe', ['-NoProfile', '-Command',

29 "$k='HKCU:\\Software\\Microsoft\\Windows\\CurrentVersion\\Run';" +

30 "foreach($n in (Get-Item $k -ErrorAction SilentlyContinue).GetValueNames()){" +

31 "$v=(Get-ItemProperty $k).$n; if($v -like '*node_modules*beast-agent*'){ Remove-ItemProperty -Path $k -Name $n; Write-Host '\u2022 startup entry removed' } }"],

32 { stdio: 'inherit' });

33 } catch {}

34 /* remove the desktop shortcut (real Desktop path: may be under OneDrive) */

35 try {

36 spawnSync('powershell.exe', ['-NoProfile', '-Command',

37 "$d=[Environment]::GetFolderPath('Desktop'); if(Test-Path \"$d\\Beast Agent.lnk\"){ Remove-Item \"$d\\Beast Agent.lnk\" -Force; Write-Host '\u2022 desktop shortcut removed' }"],

38 { stdio: 'inherit' });

39 } catch {}

40 /* remove the Start Menu shortcut (Windows AUMID registration) */

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 19

High

Semantic Analysis Limited

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

bin/beast-agent.jsView on unpkg

src/agent/docchat.jsView file

45function beastRoot() { L46: if (process.env.BEAST_DATA) return process.env.BEAST_DATA; L47: return process.env.APPDATA L48: ? path.join(process.env.APPDATA, 'beast') L49: : path.join(os.homedir(), 'AppData', 'Roaming', 'beast'); L50: } ... L92: if (!v) return null; L93: return Buffer.from(v.buffer, v.byteOffset, v.byteLength).toString('base64'); L94: }

Low

Weak Crypto

Package source references weak cryptographic algorithms.

src/agent/docchat.jsView on unpkg · L45

src/agent/searxng.jsView file

Lines 1-35javascript

1'use strict';

3/* SearXNG — local metasearch integration (github.com/searxng/searxng)

4 SearXNG officially targets Linux/Docker; on Windows it crashes because of

5 `import pwd`. This module installs the real searxng (GitHub master) into

6 Beast's EMBEDDED Python + writes a pwd shim + runs it in the background on

7 127.0.0.1:8888. The search chain only uses the 'searxng' engine while it is UP.

9 CLI: beast searxng → install if needed + start

10 beast searxng status → status

src/main.jsView file

5Trigger-reachable chain: manifest.main -> src/main.js L5: const fs = require('fs'); L6: const http = require('http'); L7: const dns = require('dns'); L8: const crypto = require('crypto'); ... L12: const OPENCODE_SESSION = 'beast-' + crypto.randomUUID(); L13: const { spawn } = require('child_process'); L14: const { Engine, OBSERVE_MARK, stripAiDashes } = require('./agent/engine'); ... L78: if (res.ok) { L79: const j = await res.json(); L80: const v = String(j.version || '').trim(); ... L89: if (win && !win.isDestroyed()) { L90: win.webContents.send('agent:event', { type: 'update', ...updateState, current: app.getVersion() });

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

src/main.jsView on unpkg · L5

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. src/main.js: sadece API key gir, modeller otomatik çekilir. Hepsi OpenAI-uyumlu. */ { id: 'opencode-zen', name: 'OpenCode Zen', baseUrl: 'https://opencode.ai/zen/v1', hint: 'Ücretsiz modeller var — anahtar: opencode.ai/auth' }, { id: 'opencode-go', name: 'OpenCode Go', baseUrl: 'https://opencode.ai/zen/go/v1', hint: 'Abonelik anahtarı' }, { id: 'openrouter', name: 'OpenRouter', baseUrl: 'https://openrouter.ai/api/v1', hint: 'openrouter.ai/keys' }, { id: 'openai', name: 'OpenAI', baseUrl: 'https://api.openai.com/v1', hint: 'platform.openai.com/api-keys' }, { id: 'anthropic', name: 'Anthropic', baseUrl: 'https://api.anthropic.com/v1', hi

High

Credential Redirect Persistence

Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.

src/main.jsView on unpkg

src/agent/store.jsView file

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. src/agent/store.js: const SITE_URL = 'https://sk[redacted]'; const SITE_FALLBACK_URL = 'https://beastagent-sk[redacted]'; const COMMUNITY_URL = 'https://raw.githubusercontent.com/algokodcom/beast-agent/main/store/skills.json'; const SKIP_DIRS = new Set(['node_modules', '.git', '__pycache__', '.drafts']); fs.writeFileSync(p, JSON.stringify(obj, null, 2)); fs.writeFileSync(target, String(content ?? ''), 'utf8');

High

Entrypoint Foreign Package Code Overwrite

Manifest-reachable source overwrites another installed package with package-defined remote behavior.

src/agent/store.jsView on unpkg

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/store.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/store.jsView on unpkg

src/agent/tools.jsView file

5const path = require('path'); L6: const https = require('https'); L7: const dns = require('dns'); L8: const net = require('net'); L9: const { execFile } = require('child_process'); L10: const { spawn } = require('child_process'); ... L222: if (/\bnpm\s+init\b/i.test(raw) && !/(\s-y\b|\s--yes\b)/i.test(raw)) { L223: return '`npm init` sihirbazı soru sorar — `npm init -y` kullan ya da package.json\'u write_file ile yaz.'; L224: } ... L256: ['-NoProfile', '-NonInteractive', '-NoExit', '-ExecutionPolicy', 'Bypass', '-Command', '-'], L257: { cwd: cwd || process.cwd(), windowsHide: true, env: envWithPathPrefix() } L258: );

Critical

Download Execute

Source downloads or fetches remote code and executes it.

src/agent/tools.jsView on unpkg · L5

bin/beast-agent.js#virtual:normalized:round1View file

44} else { L45: try { spawnSync("pkill", ["-f", "node_modules/beast-agent"], { stdio: "ignore" }); } catch {} L46: } ... L57: This command is run by the update button inside a VISIBLE cmd window; L58: it also works from a terminal — npm install output streams on screen. */ L59: if (process.argv[2] === "update") {

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

bin/beast-agent.js#virtual:normalized:round1View on unpkg · L44

src/agent/defaulttools/fastbrowse_task/fastbrowse_bridge.pyView file

•path = src/agent/defaulttools/fastbrowse_task/fastbrowse_bridge.py kind = build_helper sizeBytes = 14937 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

src/agent/defaulttools/fastbrowse_task/fastbrowse_bridge.pyView on unpkg

src/agent/mcp.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/mcp.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/mcp.jsView on unpkg

scripts/release.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = scripts/release.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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/release.jsView on unpkg

src/agent/gittools.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/gittools.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/gittools.jsView on unpkg

src/agent/apps.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/apps.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/apps.jsView on unpkg

src/agent/logger.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/logger.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/logger.jsView on unpkg

src/agent/bus.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/bus.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/bus.jsView on unpkg

src/agent/config.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/config.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/config.jsView on unpkg

src/agent/memory.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/memory.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/memory.jsView on unpkg

src/agent/xlsx.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/xlsx.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/xlsx.jsView on unpkg

src/agent/perception.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/perception.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:2.44.2 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.

src/agent/perception.jsView on unpkg

Source & flagged code

27 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/fix-electron.js --soft

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/fix-electron.js --soft

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

bin/beast-agent.jsView file

7L8: const { spawn, spawnSync } = require('child_process'); L9: const path = require('path');

High

Child Process

Package source references child process execution.

bin/beast-agent.jsView on unpkg · L7

Findings

2 Critical21 High6 Medium7 Low

CriticalDownload Executesrc/agent/tools.js

CriticalTrigger Reachable Dangerous Capabilitysrc/main.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processbin/beast-agent.js

HighShellbin/beast-agent.js

HighSame File Env Network Executionsrc/agent/searxng.js

HighCredential Redirect Persistencesrc/main.js

HighEntrypoint Foreign Package Code Overwritesrc/agent/store.js

HighCommand Output Exfiltrationsrc/main.js

HighRuntime Package Installbin/beast-agent.js#virtual:normalized:round1

HighSemantic Analysis Limitedbin/beast-agent.js

Affected versions and remediation

This report applies to beast-agent@2.81.0.

See all versions of beast-agent for other recorded verdicts.

Review the evidence and your use of beast-agent@2.81.0 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: 2026-10-19 07:57:02.519Z (UTC).

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

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Runtime surface

Behavioral surface

Source & flagged code