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@chenronggui/codex-win-patch@0.153.4-patch.4: Malicious npm | LPM Firewall

registry / @chenronggui/codex-win-patch / 0.153.4-patch.4

@chenronggui/codex-win-patch@0.153.4-patch.4

面向 OpenAI Codex CLI 的非官方 Windows x64 补丁。

AI Security Review

scanned 27d ago · by lpm-firewall-ai

A global npm installation triggers a third-party lifecycle hook that overwrites the installed OpenAI Codex executable and helper binary. This changes a foreign AI-agent control surface using opaque package-supplied executables.

Static reason

One or more suspicious static signals were detected.; source fingerprint signature matched known malicious package; routed for review

Trigger

npm install -g of this package with lifecycle scripts enabled

Impact

The global @openai/codex executable and apply_patch helper are replaced before the user explicitly runs this package's command.

Mechanism

postinstall PowerShell binary replacement

Attack narrative

Installing the package globally runs its postinstall hook. That hook launches PowerShell with execution-policy bypass and executes install.ps1, which locates a separately installed global @openai/codex package, backs up its binaries, and overwrites codex.exe and apply_patch.exe with package-supplied opaque binaries. The replacement occurs automatically during dependency installation rather than through the advertised explicit installer command.

AI rationale

This is an automatic install-time mutation of a foreign AI-agent executable surface. The package supplies opaque native replacements, so the resulting code cannot be source-audited here.

Evidence

package.jsonbin/powershell.jsinstall.ps1bin/install.jscodex.exeapply_patch.exe@openai/codex/.../bin/codex.exe@openai/codex/.../codex-path/apply_patch.exe

Decision evidence

Source & flagged code

9 flagged · loading source

package.jsonView file

•scripts.postinstall = node bin/install.js --postinstall

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

41"scripts": { "postinstall": "node bin/install.js --postinstall" }

High

Suspicious Lifecycle Evidence

Its postinstall hook automatically runs the installer.

package.jsonView on unpkg · L41

•scripts.postinstall = node bin/install.js --postinstall

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

codex.exeView file

•path = codex.exe kind = native_binary sizeBytes = 296085504 magicHex = [redacted]

Medium

Ships Native Binary

Package ships native binary artifacts.

codex.exeView on unpkg

restore.ps1View file

•path = restore.ps1 kind = build_helper sizeBytes = 4792 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

restore.ps1View on unpkg

bin/powershell.jsView file

•matchType = malicious_source_fingerprint_signature signature = bde713c797513693 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @chenronggui/codex-win-patch@0.153.4-patch.1 matchedPath = bin/powershell.js matchedIdentity = npm:[redacted]:0.153.4-patch.1 similarity = 1.000 shingleOverlap = 3 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

bin/powershell.jsView on unpkg

22const scriptPath = path.join(__dirname, "..", scriptName); const commandArgs = [ "-NoLogo", "-NoProfile", "-NonInteractive", "-ExecutionPolicy", "Bypass", "-File", scriptPath, ...args, ]; for (const command of powershellCandidates()) { const result = spawnSync(command, commandArgs, { stdio: "inherit", windowsHide: true, });

High

Ai Review Evidence

The installer invokes PowerShell with execution-policy bypass.

bin/powershell.jsView on unpkg · L22

install.ps1View file

175$codexTarget = Join-Path $packageDirectory "bin\codex.exe" $pathDirectory = Join-Path $packageDirectory "codex-path" $applyPatchTarget = Join-Path $pathDirectory "apply_patch.exe" $codexSource = Join-Path $PayloadDirectory "codex.exe" $applyPatchSource = Join-Path $PayloadDirectory "apply_patch.exe" Assert-CodexNotRunning $codexTarget

High

Ai Review Evidence

The PowerShell installer replaces executables in the separately installed global @openai/codex package.

install.ps1View on unpkg · L175

215try { Write-Step "Installing codex.exe and native apply_patch.exe" [IO.Directory]::CreateDirectory($pathDirectory) | Out-Null Copy-FileReplacing $codexSource $codexTarget Copy-FileReplacing $applyPatchSource $applyPatchTarget

High

Ai Review Evidence

The PowerShell installer replaces executables in the separately installed global @openai/codex package.

install.ps1View on unpkg · L215

Source & flagged code

9 flagged

package.jsonView file

Lines 21-48json

21 ],

22 "engines": {

23 "node": ">=16"

24 },

25 "bin": {

26 "codex-win-patch-install": "bin/install.js",

27 "codex-win-patch-restore": "bin/restore.js"

28 },

29 "files": [

30 "bin",

31 "apply_patch.exe",

32 "build-info.json",

33 "codex.exe",

34 "docs",

35 "install.ps1",

36 "LICENSE",

37 "README.md",

38 "restore.ps1",

39 "SHA256SUMS"

40 ],

41 "scripts": {

42 "postinstall": "node bin/install.js --postinstall"

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L42

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L42

43 },

High

Suspicious Lifecycle Evidence

Its postinstall hook automatically runs the installer.

package.jsonView on unpkg · L41

44 "publishConfig": {

45 "access": "public",

46 "registry": "https://registry.npmjs.org/"

47 }

48}

codex.exeView file

•path = codex.exe kind = native_binary sizeBytes = 296085504 magicHex = [redacted]

Medium

Ships Native Binary

Package ships native binary artifacts.

codex.exeView on unpkg

restore.ps1View file

•path = restore.ps1 kind = build_helper sizeBytes = 4792 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

restore.ps1View on unpkg

bin/powershell.jsView file

Lines 2-42javascript

2const path = require("node:path");

3

4function powershellCandidates() {

5 const configured = process.env.CODEX_WINDOWS_PATCH_POWERSHELL;

install.ps1View file

Lines 155-235text

155 throw "This overlay supports Windows x64 only."

156}

157

158Write-Step "Verifying overlay payload"

159Assert-PayloadHashes

160

161$globalNpmRoot = Resolve-GlobalNpmRoot

162$packageDirectory = Resolve-CodexPackageDirectory $globalNpmRoot

163$packageManifestPath = Join-Path $packageDirectory "codex-package.json"

164$packageManifest = Get-Content -LiteralPath $packageManifestPath -Raw | ConvertFrom-Json

165$buildInfoPath = Join-Path $PayloadDirectory "build-info.json"

166if (Test-Path -LiteralPath $buildInfoPath -PathType Leaf) {