registry / Install hook abuse / @siriusbeyond/utils

@siriusbeyond/utils

SECURITY RESEARCH - Dependency Confusion PoC - Contact: ajmalaboobacker00@gmail.com

This report shows the evidence for @siriusbeyond/utils@99.0.0, the only known version.

This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The package implements an automatic install-time reconnaissance and external callback chain. Its research labels do not establish consent for this behavior.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Installing the package runs preinstall and postinstall.

Impact

Installation environment details, including credential-related variable names, are disclosed to an external recipient.

Mechanism

callback.js inventories environment and host context, builds a message, and posts it over HTTPS.

Attack narrative

On installation, both lifecycle hooks invoke callback.js while suppressing failures. The script gathers host and CI/cloud context plus names of potentially sensitive environment variables, then sends the resulting message to Telegram. The behavior is automatic and unrelated to the declared utility package function.

AI rationale

The package implements an automatic install-time reconnaissance and external callback chain. Its research labels do not establish consent for this behavior.

Evidence

package.jsoncallback.js

Network endpoints1

api.telegram.org

Decision evidence

public snapshot

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

Evidence for block

The package runs callback.js automatically during both preinstall and postinstall.
The callback collects host, user, working-directory, home-directory, CI/cloud, registry, and UID metadata.
It identifies environment-variable names matching credential-related patterns.
It sends the constructed message by HTTPS to api.telegram.org.

Evidence against

The inspected source does not read secret environment-variable values or files.

Behavioral surface

Source

EnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStrings

ManifestNo manifest risk signals triggered.

scanned 2 file(s), 3.90 KB of source

Source & flagged code

8 flagged

package.jsonView file

•scripts.preinstall = node callback.js 2>/dev/null || true

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.preinstall = node callback.js 2>/dev/null || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

•scripts.postinstall = node callback.js 2>/dev/null || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

callback.jsView file

4*/ L5: const https = require('https'); L6: const os = require('os'); ... L11: const CHAT_ID = '1064260758'; L12: const PKG_NAME = process.env.npm[redacted] || 'unknown'; L13: ... L15: const indicators = { L16: 'GitHub Actions': process.env.GITHUB_ACTIONS, L17: 'GitLab CI': process.env.GITLAB_CI, ... L57: package: PKG_NAME, L58: hostname: os.hostname(), L59: user: os.userInfo().username,

Critical

Hardcoded Runtime Data Exfiltration

Source sends credentials or rich application records to a package-controlled external receiver enabled by default.

callback.jsView on unpkg · L4

Critical

Credential Exfiltration

Source appears to send environment or credential material to an external endpoint.

callback.jsView on unpkg · L4

4Trigger-reachable chain: scripts.preinstall -> callback.js L4: */ L5: const https = require('https'); L6: const os = require('os'); ... L11: const CHAT_ID = '1064260758'; L12: const PKG_NAME = process.env.npm[redacted] || 'unknown'; L13: ... L15: const indicators = { L16: 'GitHub Actions': process.env.GITHUB_ACTIONS, L17: 'GitLab CI': process.env.GITLAB_CI, ... L57: package: PKG_NAME, L58: hostname: os.hostname(), L59: user: os.userInfo().username,

Critical

Trigger Reachable Dangerous Capability

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

callback.jsView on unpkg · L4

High

Host Fingerprint Exfiltration

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

callback.jsView on unpkg · L4

4Trigger-reachable credential exfiltration chain: scripts.preinstall -> callback.js L4: */ L5: const https = require('https'); L6: const os = require('os'); ... L11: const CHAT_ID = '1064260758'; L12: const PKG_NAME = process.env.npm[redacted] || 'unknown'; L13: ... L15: const indicators = { L16: 'GitHub Actions': process.env.GITHUB_ACTIONS, L17: 'GitLab CI': process.env.GITLAB_CI, ... L57: package: PKG_NAME, L58: hostname: os.hostname(), L59: user: os.userInfo().username,

High

Trigger Reachable Credential Exfiltration

A manifest entrypoint or package-local install chain reaches credential exfiltration behavior.

callback.jsView on unpkg · L4

Source & flagged code

8 flagged · loading source

package.jsonView file

•scripts.preinstall = node callback.js 2>/dev/null || true

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.preinstall = node callback.js 2>/dev/null || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

•scripts.postinstall = node callback.js 2>/dev/null || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

callback.jsView file

Findings

3 Critical3 High5 Medium3 Low

CriticalHardcoded Runtime Data Exfiltrationcallback.js

CriticalCredential Exfiltrationcallback.js

CriticalTrigger Reachable Dangerous Capabilitycallback.js

HighInstall Time Lifecycle Scriptspackage.json

HighHost Fingerprint Exfiltrationcallback.js

HighTrigger Reachable Credential Exfiltrationcallback.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

Affected versions and remediation

This report applies to @siriusbeyond/utils@99.0.0.

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

Avoid installing @siriusbeyond/utils@99.0.0. 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: 2026-09-22 00:03:51.187Z (UTC).

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

Versions

1 known version

99.0.0latestshownMaliciousInstall Hook AbuseBlockPublishedSep 20, 2026, 8:59 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

More from @siriusbeyond

Other install hook abuse packages

Behavioral surface

Related packages

More from @siriusbeyond

Other install hook abuse packages

Source & flagged code