registry / AI-agent capability abuse / beast-agent / 2.37.0

beast-agent@2.37.0

Ultra-fast local agent shell for Windows.

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

Source inspection found dangerous agent execution with default-off confirmations, but no concrete install-time compromise, secret theft, self-dependent lifecycle chain, or foreign control-surface mutation. The appropriate result is a warning for dangerous capability rather than a malware block.

Static reason

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

Trigger

Running the desktop agent and allowing an LLM tool call.

Impact

A malicious prompt or model response could modify local projects or run commands.

Mechanism

Model-directed PowerShell or Bash execution.

AI rationale

Decision evidence

public snapshot

AI called this Suspicious at 88.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

Installation automatically runs an Electron repair script.
Risky agent-tool confirmations are disabled by default.
The agent passes model-supplied commands to PowerShell or Bash.

Evidence against

The install script targets the package's Electron dependency, not an AI-agent control surface.
No self-dependency, credential exfiltration, or hidden install-time payload was found.
Skill installation is exposed through an explicit application IPC action.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNativeBindingsNetworkShellWebSocket

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 65 file(s), 2.10 MB of source, external domains: 127.0.0.1, api.anthropic.com, api.github.com, api.groq.com, api.openai.com, api.search.tinyfish.ai, api.telegram.org, api.z.ai, beastagent-skills.web.app, bootstrap.pypa.io, codeload.github.com, connectivitycheck.gstatic.com, cp.cloudflare.com, cua.ai, discord.com, duckduckgo.com, generativelanguage.googleapis.com, git-scm.com, github.com, html.duckduckgo.com, integrate.api.nvidia.com, news.google.com, npmmirror.com, opencode.ai, openrouter.ai, raw.githubusercontent.com, registry.npmjs.org, schemas.openxmlformats.org, skills.algokod.com, www.google.com, www.msftconnecttest.com, www.npmjs.com, www.python.org, www.w3.org

Source & flagged code

17 flagged

package.jsonView file

Lines 23-63json

23 "llm",

24 "openai"

25 ],

26 "main": "src/main.js",

27 "preferGlobal": true,

28 "bin": {

29 "beast-agent": "bin/beast-agent.js",

30 "beast": "bin/beast-agent.js"

31 },

32 "files": [

33 "src/**/*",

34 "assets/**/*",

35 "scripts/**/*",

36 "!**/__pycache__/**"

37 ],

38 "scripts": {

39 "start": "electron .",

40 "dist": "electron-builder --win nsis portable",

41 "test": "node --test \"tests/**/*.test.js\"",

42 "release": "node scripts/release.js",

43 "postinstall": "node scripts/fix-electron.js --soft",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L43

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L43

44 "prepublishOnly": "node scripts/swap-electron.js deps",

45 "postpublish": "node scripts/swap-electron.js devdeps"

46 },

47 "devDependencies": {

48 "electron-builder": "^26.15.3"

49 },

50 "dependencies": {

51 "@huggingface/transformers": "3.7.5",

52 "@pdf-lib/fontkit": "^1.1.1",

53 "@whiskeysockets/baileys": "^7.0.0-rc14",

54 "@xenova/transformers": "^2.17.2",

55 "electron-updater": "^6.8.9",

56 "ffmpeg-static": "^5.3.0",

57 "imapflow": "^1.7.6",

58 "nodemailer": "^9.0.5",

59 "pdf-lib": "^1.17.1",

60 "pdf-parse": "^2.4.5",

61 "pdf-to-img": "^6.3.0",

62 "pdfjs-dist": "^5.6.205",

63 "pdfkit": "^0.20.1",

bin/beast-agent.jsView file

Lines 1-27javascript

1#!/usr/bin/env node

2'use strict';

4/* Beast Agent global npm başlatıcısı (`beast` kısa adı da aynı scripte bağlı):

5 `beast` / `beast-agent` → uygulamayı detached başlatır, terminali hemen serbest bırakır

6 `beast update` → npm'den en son sürümü yükler (uygulama kapalıyken çalıştır) */

8const { spawn, spawnSync } = require(

src/main.jsView file

Lines 1-25javascript

1'use strict';

3const { app, BrowserWindow, WebContentsView, ipcMain, shell, dialog, Tray, Menu, nativeImage, desktopCapturer, session,

src/agent/mem0.jsView file

Lines 9-49javascript

9 - Hibrit arama: 0.65*semantic(cosine) + 0.35*keyword (mem0 semantic+BM25 felsefesi)

10 Her fonksiyon degradasyonlu: embedding yoksa keyword, LLM yoksa hash+cos dedup.

src/agent/searxng.jsView file

Lines 1-35javascript

1'use strict';

3/* SearXNG — yerel metasearch entegrasyonu (github.com/searxng/searxng)

4 SearXNG resmi olarak Linux/Docker hedefler; Windows'ta `import pwd`

5 yüzünden patlar. Bu modül Beast'ın GÖMÜLÜ Python'ına gerçek searxng'yi

6 (GitHub master) kurar + pwd shim'i yazar + 127.0.0.1:8888'de arka planda

7 çalıştırır. Arama zinciri 'searxng' motorunu yalnız AYAKTAYSA kullanır.

9 CLI: beast searxng → gerekirse kur + başlat

10 beast searxng status → durum

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

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'); ... L107: ['-NoProfile', '-NoExit', '-Command', '-'], L108: { cwd: cwd || process.cwd(), windowsHide: true, env: envWithPathPrefix() } L109: ); ... L125: proc.stdin.unref && proc.stdin.unref(); L126: proc.stdout.unref && proc.stdout.unref(); L127: proc.stderr.unref && proc.stderr.unref();

Critical

Download Execute

Source downloads or fetches remote code and executes it.

src/agent/tools.jsView on unpkg · L5

src/agent/computeruse.jsView file

8L9: Sürücü: https://github.com/trycua/cua — `cua-driver mcp` stdio MCP sunucusu; L10: el yazımı minimal JSON-RPC 2.0 client'ı (mcp.js ile aynı çerçeve). L11: Binary yoksa eski PowerShell backend'ine düşer (yalnız koordinat + foreground). L12: ... L49: otomatik kurulum asla çalışmaz (tests dahil). */ L50: return !String(process.env.BEAST_CUA_DRIVER_CMD || '').trim(); L51: } ... L56: return new Promise((resolve) => { L57: execFile(driverCmd(), ['--version'], { timeout: 10000, windowsHide: true }, (err, stdout) => { L58: const res = { ... L70: function runInstaller(cb) {

High

Sandbox Evasion Gated Capability

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

src/agent/computeruse.jsView on unpkg · L8

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

29L30: /* güncelleme modu: çalışan Beast"i kapat (dosya kilidi EBUSY vermesin) → npm güncelle (görünür ilerleme) → yeniden başlat.\r\n Bu komut güncelleme butonu tarafından GÖRÜNÜR bir ... L31: detached: true,

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

bin/beast-agent.js#virtual:normalized:round1View on unpkg · L29

src/agent/scripts/mt5_bridge.pyView file

•path = src/agent/scripts/mt5_bridge.py kind = build_helper sizeBytes = 14080 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

src/agent/scripts/mt5_bridge.pyView on unpkg

src/agent/bus.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@1.2.3 matchedPath = src/agent/bus.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:1.2.3 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@1.2.3 matchedPath = src/agent/config.js matchedIdentity = npm:YmVhc3QtYWdlbnQ:1.2.3 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

Source & flagged code

17 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 Critical11 High6 Medium6 Low

CriticalDownload Executesrc/agent/tools.js

CriticalTrigger Reachable Dangerous Capabilitysrc/main.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processbin/beast-agent.js

HighShellsrc/main.js

HighSame File Env Network Executionsrc/agent/searxng.js

HighEntrypoint Foreign Package Code Overwritesrc/agent/store.js

HighCommand Output Exfiltrationsrc/main.js

HighSandbox Evasion Gated Capabilitysrc/agent/computeruse.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@2.37.0.

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

Review the evidence and your use of beast-agent@2.37.0 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: 2026-09-11 15:12:26.851Z (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