registry / AI-agent capability abuse / beast-agent / 2.44.12

beast-agent@2.44.12

Ultra-fast local agent shell for Windows.

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

No concrete malicious install chain or stealth exfiltration was established. The package nonetheless combines credential reuse and arbitrary command execution, so it warrants a warning for dangerous agent capability.

Static reason

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

Trigger

A user invokes the one-click OpenCode setup or directs the running agent to run a command; installation invokes the Electron repair hook.

Impact

A user-authorized action can reuse an existing OpenCode credential and execute commands in the selected workspace; the install hook can replace Electron runtime files.

Mechanism

Imports an external service token, performs authenticated API requests, and exposes shell command execution.

AI rationale

Evidence

package.jsonscripts/fix-electron.jssrc/agent/tools.jssrc/main.js.local/share/opencode/auth.json.config/opencode/auth.jsonAppData/Roaming/opencode/auth.jsonAppData/Local/opencode/auth.jsonnode_modules/electron/distnode_modules/electron/path.txtnode_modules/electron/install.js

Network endpoints2

opencode.ai/zen/v1npmmirror.com/mirrors/electron/

Decision evidence

public snapshot

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

Evidence for warning

The install hook repairs Electron by deleting runtime files and running Electron's installer, including through a mirror.
The agent exposes persistent PowerShell sessions and passes model-supplied command text to them.
A one-click handler searches OpenCode authentication files outside this package, imports a token, and uses it as a bearer credential.
The token-import flow can install a global CLI and open an authentication command.

Evidence against

The install hook is limited to the package's Electron dependency and is a visible runtime-repair routine.
No self-dependency or lifecycle write to an AI-agent control surface was found.
The credential-import and command features are activated through an explicit application handler, not during installation.
No source evidence showed secret exfiltration to an unrelated endpoint or hidden persistence.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork

Source & flagged code

27 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 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

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'); ... L69: if (res.ok) { L70: const j = await res.json(); L71: const v = String(j.version || '').trim(); ... L80: if (win && !win.isDestroyed()) { L81: 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

1180const zipPath = path.join(outDir, `beast-${stamp}.zip`); L1181: /* zip yoksa PowerShell Compress-Archive ile */ L1182: await new Promise((resolve, reject) => {

High

Shell

Package source references shell execution.

src/main.jsView on unpkg · L1180

•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

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 — 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/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

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/tools.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/tools.jsView on unpkg

src/agent/defaulttools/mt5_m15_m5/m15m5.pyView file

•path = src/agent/defaulttools/mt5_m15_m5/m15m5.py kind = build_helper sizeBytes = 1937 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

src/agent/defaulttools/mt5_m15_m5/m15m5.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/fix-electron.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = scripts/fix-electron.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/fix-electron.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/mt5bridge.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/mt5bridge.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/mt5bridge.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/customtools.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/customtools.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/customtools.jsView on unpkg

src/agent/defaulttools/mt5_bekleyen/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_bekleyen/run.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/defaulttools/mt5_bekleyen/run.jsView on unpkg

src/agent/defaulttools/mt5_durum/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_durum/run.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/defaulttools/mt5_durum/run.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 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

HighCredential Redirect Persistencesrc/main.js

HighEntrypoint Foreign Package Code Overwritesrc/agent/store.js

HighCommand Output Exfiltrationsrc/main.js

HighRuntime Package Installsrc/main.js

HighSemantic Analysis Limitedbin/beast-agent.js

HighKnown Malware Source Similarity

Affected versions and remediation

This report applies to beast-agent@2.44.12.

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

Review the evidence and your use of beast-agent@2.44.12 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: 2026-09-13 20:15:31.290Z (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