registry / AI-agent capability abuse / beast-agent / 2.62.1

beast-agent@2.62.1

Ultra-fast local agent shell for Windows.

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The package is not shown to be malware, but it combines automatic runtime replacement with an agent that can execute commands while approvals default to automatic. This is a real dangerous capability that warrants a warning.

Static reason

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

Trigger

Installing the package runs the hook; using Beast Code or its chat agent can invoke tools.

Impact

A malicious prompt or compromised model response could run PowerShell commands and alter the selected workspace without a per-command approval prompt.

Mechanism

Automatic Electron repair plus approval-bypassing agent command execution.

AI rationale

Evidence

package.jsonscripts/fix-electron.jssrc/agent/tools.jssrc/agent/engine.jsnode_modules/electron/distnode_modules/electron/path.txtworkspace directory

Network endpoints1

npmmirror.com/mirrors/electron/

Decision evidence

public snapshot

AI called this Suspicious at 87.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The install hook launches a repair script automatically.
The repair script deletes and re-downloads the Electron runtime, including from a mirror.
The agent exposes an LLM-callable PowerShell command tool in the workspace.
Risky-tool approvals are disabled by default unless configured.

Evidence against

No runtime dependency on beast-agent itself was found.
The install hook targets Electron runtime files rather than AI-agent configuration.
No code-based credential collection or secret exfiltration endpoint was found.
No reviewer-directed manipulation text was found.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShellWebSocket

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

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

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

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 14

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

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

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/beast-agent.jsView on unpkg · L7

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'); ... L70: if (res.ok) { L71: const j = await res.json(); L72: const v = String(j.version || '').trim(); ... L81: if (win && !win.isDestroyed()) { L82: 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

1264const zipPath = path.join(outDir, `beast-${stamp}.zip`); L1265: /* zip yoksa PowerShell Compress-Archive ile */ L1266: await new Promise((resolve, reject) => {

High

Shell

Package source references shell execution.

src/main.jsView on unpkg · L1264

•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

29function beastRoot() { L30: if (process.env.BEAST_DATA) return process.env.BEAST_DATA; L31: return process.env.APPDATA L32: ? path.join(process.env.APPDATA, 'beast') L33: : path.join(os.homedir(), 'AppData', 'Roaming', 'beast'); L34: } ... L167: if (!v) return null; L168: return Buffer.from(v.buffer, v.byteOffset, v.byteLength).toString('base64'); L169: }

Low

Weak Crypto

Package source references weak cryptographic algorithms.

src/agent/mem0.jsView on unpkg · L29

src/agent/searxng.jsView file

15const os = require('os'); L16: const { spawn, execFile, execSync } = require('child_process'); L17: L18: const REQS_URL = 'https://raw.githubusercontent.[redacted].txt'; L19: const PKG_URL = 'https://github.[redacted].zip'; ... L25: function beastAppDir() { L26: if (process.env.BEAST_DATA) return process.env.BEAST_DATA; L27: return process.env.APPDATA

High

Same File Env Network Execution

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

src/agent/searxng.jsView on unpkg · L15

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/searxng.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/searxng.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

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/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/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/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

src/agent/defaulttools/mt5_emir/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_emir/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_emir/run.jsView on unpkg

src/agent/defaulttools/mt5_emir_iptal/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_emir_iptal/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_emir_iptal/run.jsView on unpkg

src/agent/defaulttools/mt5_fiyat/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_fiyat/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_fiyat/run.jsView on unpkg

src/agent/defaulttools/mt5_gecmis/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_gecmis/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_gecmis/run.jsView on unpkg

src/agent/defaulttools/mt5_pozisyon_gecmis/run.jsView file

•matchType = normalized_sha256 matchedPackage = beast-agent@2.44.2 matchedPath = src/agent/defaulttools/mt5_pozisyon_gecmis/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_pozisyon_gecmis/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 Installbin/beast-agent.js#virtual:normalized:round1

HighSemantic Analysis Limitedbin/beast-agent.js

High

Affected versions and remediation

This report applies to beast-agent@2.62.1.

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

Review the evidence and your use of beast-agent@2.62.1 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: 2026-09-15 20:24:32.239Z (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