registry / Install hook abuse / @rutxploit-sec/subsplash-intercom

@rutxploit-sec/subsplash-intercom

BUGBOUNTY PoC — represents @subsplash/intercom — @subsplash/intercom (2 refs) — Subsplash report 7a8faa0b

This report shows the evidence for @rutxploit-sec/subsplash-intercom@1.0.0, the only known version.

AI Security Review

scanned 26d ago · by lpm-firewall-ai

Automatic collection and transmission of host identity data during preinstall is concrete install-hook abuse. The package's dependency-confusion framing reinforces malicious intent.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Automatic npm preinstall execution.

Impact

Installation can silently disclose the machine hostname and local account name to a listener controlled by another local process.

Mechanism

Inline Node code reads operating-system identity information and issues an HTTP request to 127.0.0.1:8099.

Attack narrative

This dependency-confusion-themed package executes before installation completes. Its hook collects the current hostname and username, then sends both to a local HTTP service and suppresses error output. The entrypoint reinforces that the package is intended to be loaded from public npm as part of dependency confusion.

AI rationale

Automatic collection and transmission of host identity data during preinstall is concrete install-hook abuse. The package's dependency-confusion framing reinforces malicious intent.

Evidence

package.jsonindex.js

Network endpoints1

127.0.0.1:8099/

Decision evidence

public snapshot

AI called this Malicious at 98.0% confidence as Malware with low false-positive risk.

Evidence for block

The manifest identifies this package as a public-package impersonation proof of concept.
An automatic preinstall hook collects the local hostname and account name, sends them to a local HTTP receiver, and suppresses errors.
The runtime entrypoint explicitly announces public-package dependency confusion.

Evidence against

Behavioral surface

SourceNo risky source behavior triggered.

Supply chain

HighEntropyStringsTrivial

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 116 B of source

Source & flagged code

6 flagged

package.jsonView file

•scripts.preinstall = node -e "var http=require('http'),os=require('os'),h=os.hostname(),u=os.userInfo().username;http.get('http://127.0.0.1:8099/?pkg='+encodeURIComponent('@subsplash/intercom')+'&host=...

Critical

Red Install Lifecycle Script

Install-time lifecycle script matches a deterministic static-gate block pattern.

package.jsonView on unpkg

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

2"name": "@rutxploit-sec/subsplash-intercom", "version": "1.0.0", "description": "BUGBOUNTY PoC — repre

High

Ai Review Evidence

The manifest identifies this package as a public-package impersonation proof of concept.

package.jsonView on unpkg · L2

7"preinstall": "node -e \"var http=require('http'),os=require('os'),h=os.hostname(),u=os.userInfo().username;http.get('http://127.0.0.1:8099/?pkg='+encodeURIComponent('@subsplash/intercom')+'&host='+encodeURIComponent(h)+'&user='+encodeURIComponent(u),function(r){r.resume()});\" 2>/dev/null; echo '[BUGBOUNTY] @subsplash/intercom dep confusion EXECUTED —

High

Suspicious Lifecycle Evidence

An automatic preinstall hook collects the local hostname and account name, sends them to a local HTTP receiver, and suppresses errors.

package.jsonView on unpkg · L7

package.json#scripts.preinstallView file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

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

package.json#scripts.preinstallView on unpkg

index.jsView file

1var os=require("os"); console.log("[DEP-CONFUSION] @subsplash/intercom loaded from PUBLIC npm"); module.exports={};

High

Suspicious Dependency Evidence

The runtime entrypoint explicitly announces public-package dependency confusion.

index.jsView on unpkg · L1

Source & flagged code

6 flagged · loading source

package.jsonView file

Critical

Red Install Lifecycle Script

Install-time lifecycle script matches a deterministic static-gate block pattern.

package.jsonView on unpkg

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

2"name": "@rutxploit-sec/subsplash-intercom", "version": "1.0.0", "description": "BUGBOUNTY PoC — repre

High

Ai Review Evidence

The manifest identifies this package as a public-package impersonation proof of concept.

package.jsonView on unpkg · L2

Findings

1 Critical5 High2 Low

CriticalRed Install Lifecycle Scriptpackage.json

HighInstall Time Lifecycle Scriptspackage.json

HighSemantic Analysis Limitedpackage.json#scripts.preinstall

HighAi Review Evidencepackage.json

HighSuspicious Lifecycle Evidencepackage.json

HighSuspicious Dependency Evidenceindex.js

LowScripts Present

LowHigh Entropy Strings

Affected versions and remediation

This report applies to @rutxploit-sec/subsplash-intercom@1.0.0.

The versions list below shows the verdict for each recorded version.

Avoid installing @rutxploit-sec/subsplash-intercom@1.0.0. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-09-27 07:05:42.144Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

1 known version

1.0.0latestshownMaliciousInstall Hook AbuseBlockPublishedSep 27, 2026, 7:03 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

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Source & flagged code

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