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@firedmosquito831/my-claude-code@6.77.0: Malicious npm security | LPM Firewall

registry / @firedmosquito831/my-claude-code / 6.77.0

@firedmosquito831/my-claude-code@6.77.0

My Claude Code (MCC): route Claude Code and other coding agents to any model provider through one local proxy with a dashboard. This npm package installs and launches the Python server.

AI Security Review

scanned 27d ago · by lpm-firewall-ai

A global npm installation automatically retrieves and executes a remote installer script. The script is selected from a mutable repository branch and is not included or integrity-pinned in this package.

Static reason

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

Trigger

npm install -g @firedmosquito831/my-claude-code with lifecycle scripts enabled

Impact

A repository change or delivery compromise can execute arbitrary commands and modify the installing user's machine during npm installation.

Mechanism

Postinstall remote shell execution through curl-to-sh or PowerShell irm-to-scriptblock.

Attack narrative

The package's postinstall hook runs on global installation and calls its installer. That installer constructs a command that downloads install.sh from the repository's mutable main branch and immediately pipes it to sh; Windows similarly evaluates remotely retrieved PowerShell. The package does not pin the script revision or verify its content before execution. This gives remote repository content command execution in the installer's user context during an automatic lifecycle hook.

AI rationale

The automatic lifecycle hook executes opaque remote code from a mutable branch, creating a concrete remote-code-execution supply-chain path. Skip guards do not protect normal global installs.

Evidence

package.jsonbin/postinstall.jsbin/runtime-install.js

Network endpoints2

raw.githubusercontent.com/FiredMosquito831/my-claude-code/main/scripts

Source & flagged code

8 flagged · loading source

package.jsonView file

•scripts.postinstall = node bin/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node bin/postinstall.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

bin/my-claude-code.jsView file

19L20: const childProcess = require("node:child_process"); L21: const os = require("node:os");

High

Child Process

Package source references child process execution.

bin/my-claude-code.jsView on unpkg · L19

•matchType = normalized_sha256 matchedPackage = @firedmosquito831/my-claude-code@6.75.0 matchedPath = bin/my-claude-code.js matchedIdentity = npm:[redacted]:6.75.0 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.

bin/my-claude-code.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 0feae99d531fadaf signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @firedmosquito831/my-claude-code@6.75.0 matchedPath = bin/my-claude-code.js matchedIdentity = npm:[redacted]:6.75.0 similarity = 1.000 shingleOverlap = 4 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/my-claude-code.jsView on unpkg

bin/runtime-install.js#virtual:normalized:round1View file

17// The desktop half installs the OS-NATIVE shape: the Inno setup on Windows, L18: // the .dmg into ~/Applications on macOS, the .deb (or the tarball"s own\n// per-user installer) on Linux. That is deliberately not what `mcc-desktop`\n// does -- `mcc-desktop` dow... L19: // than to "unsupported". ... L32: desktop session, the desktop application in its native form: the setup.exe on L33: Windows, the .dmg into ~/Applications on macOS, the .deb (or the tarball"s\nper-user installer) on Linux. On a headless box, over SSH, in CI or in WSL\nwithout a display it install... L34: // launcher and its shortcuts. A headless box has nowhere to put them.

High

Same File Env Network Execution

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

bin/runtime-install.js#virtual:normalized:round1View on unpkg · L17

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 2

High

Semantic Analysis Limited

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

bin/runtime-install.js#virtual:normalized:round1View on unpkg

bin/runtime-install.jsView file

•matchType = normalized_sha256 matchedPackage = @firedmosquito831/my-claude-code@6.75.0 matchedPath = bin/runtime-install.js matchedIdentity = npm:[redacted]:6.75.0 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.

bin/runtime-install.jsView on unpkg

Source & flagged code

8 flagged

package.jsonView file

•scripts.postinstall = node bin/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node bin/postinstall.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

bin/my-claude-code.jsView file

19L20: const childProcess = require("node:child_process"); L21: const os = require("node:os");

High

Child Process

Package source references child process execution.

bin/my-claude-code.jsView on unpkg · L19

•matchType = normalized_sha256 matchedPackage = @firedmosquito831/my-claude-code@6.75.0 matchedPath = bin/my-claude-code.js matchedIdentity = npm:[redacted]:6.75.0 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.

bin/my-claude-code.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 0feae99d531fadaf signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @firedmosquito831/my-claude-code@6.75.0 matchedPath = bin/my-claude-code.js matchedIdentity = npm:[redacted]:6.75.0 similarity = 1.000 shingleOverlap = 4 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/my-claude-code.jsView on unpkg

bin/runtime-install.js#virtual:normalized:round1View file

17// The desktop half installs the OS-NATIVE shape: the Inno setup on Windows, L18: // the .dmg into ~/Applications on macOS, the .deb (or the tarball"s own\n// per-user installer) on Linux. That is deliberately not what `mcc-desktop`\n// does -- `mcc-desktop` dow... L19: // than to "unsupported". ... L32: desktop session, the desktop application in its native form: the setup.exe on L33: Windows, the .dmg into ~/Applications on macOS, the .deb (or the tarball"s\nper-user installer) on Linux. On a headless box, over SSH, in CI or in WSL\nwithout a display it install... L34: // launcher and its shortcuts. A headless box has nowhere to put them.

High

Same File Env Network Execution

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

bin/runtime-install.js#virtual:normalized:round1View on unpkg · L17

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 2

High

Semantic Analysis Limited

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

bin/runtime-install.js#virtual:normalized:round1View on unpkg

bin/runtime-install.jsView file

•matchType = normalized_sha256 matchedPackage = @firedmosquito831/my-claude-code@6.75.0 matchedPath = bin/runtime-install.js matchedIdentity = npm:[redacted]:6.75.0 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.

bin/runtime-install.jsView on unpkg