tool-registry-scripts: Malicious npm security report (Block)

AI Security Review

scanned 4h ago · by lpm-firewall-ai

The package executes automatically before installation completes and exfiltrates host and system-file data to an external collaborator endpoint.

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 preinstall

Impact

Unconsented disclosure of install-host identity, network configuration, and /etc system data.

Mechanism

HTTPS POST of collected host fingerprint and local file contents

Attack narrative

During npm preinstall, package.json launches index.js. It gathers host identity and configuration data, reads /etc/passwd and /etc/hosts if available, then serializes and sends it via HTTPS POST to an external oastify.com endpoint.

Rationale

Source directly implements unconsented install-time host-data collection and external exfiltration. This is concrete malicious behavior, not a package-aligned feature.

Evidence

package.jsonindex.js/etc/passwd/etc/hosts

Network endpoints1

lsh5x8dwumsekllw37kacgaqxh3cr2fr.oastify.com

Decision evidence

public snapshot

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

Evidence for block

package.json runs `node index.js` in preinstall.
index.js collects hostname, username, home directory, DNS servers, and install path.
index.js reads /etc/passwd and /etc/hosts when present.
index.js POSTs the collected data to lsh5x8dwumsekllw37kacgaqxh3cr2fr.oastify.com.

Evidence against

Behavioral surface

Source

FilesystemNetwork

Supply chain

HighEntropyStrings

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 1.97 KB of source

Source & flagged code

4 flagged

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

index.jsView file

1const os = require("os"); L2: const dns = require("dns"); L3: const fs = require("fs"); L4: const https = require("https"); L5: const packageJSON = require("./package.json"); L6: const packageName = packageJSON.name; ... L10: p: packageName, // Package name L11: c: __dirname, // Directory where the package is installed L12: hd: os.homedir(), // Home directory on the remote server L13: hn: os.hostname(), // Hostname of the remote server L14: un: os.userInfo().username, // Username on the remote server ... L17: pjson: packageJSON, // Full package.json data

High

Host Fingerprint Exfiltration

Source collects local host identity data and sends it to an external endpoint.

index.jsView on unpkg · L1

•matchType = normalized_sha256 matchedPackage = tidal-embed-player@1.0.1 matchedPath = index.js matchedIdentity = npm:dGlkYWwtZW1iZWQtcGxheWVy:1.0.1 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 = 5442fb9217b0dd0a signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = tidal-embed-player@1.0.1 matchedPath = index.js matchedIdentity = npm:dGlkYWwtZW1iZWQtcGxheWVy:1.0.1 similarity = 1.000 shingleOverlap = 1 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

Source & flagged code

4 flagged · loading source

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

index.jsView file

1const os = require("os"); L2: const dns = require("dns"); L3: const fs = require("fs"); L4: const https = require("https"); L5: const packageJSON = require("./package.json"); L6: const packageName = packageJSON.name; ... L10: p: packageName, // Package name L11: c: __dirname, // Directory where the package is installed L12: hd: os.homedir(), // Home directory on the remote server L13: hn: os.hostname(), // Hostname of the remote server L14: un: os.userInfo().username, // Username on the remote server ... L17: pjson: packageJSON, // Full package.json data

High

Host Fingerprint Exfiltration

Source collects local host identity data and sends it to an external endpoint.

index.jsView on unpkg · L1

•matchType = normalized_sha256 matchedPackage = tidal-embed-player@1.0.1 matchedPath = index.js matchedIdentity = npm:dGlkYWwtZW1iZWQtcGxheWVy:1.0.1 similarity = 1.000 summary = normalized source hash matched finalized malicious source

Findings

4 High1 Medium3 Low

HighInstall Time Lifecycle Scriptspackage.json

HighHost Fingerprint Exfiltrationindex.js

HighKnown Malware Source Similarityindex.js

HighKnown Malware Source Fingerprint Signatureindex.js

MediumNetwork

LowScripts Present

LowFilesystem

LowHigh Entropy Strings