@coopeuch/components@1.999.999
Coordinated vulnerability disclosure proof of concept for a dependency confusion issue.
AI Security Review
scanned 12d ago · by lpm-firewall-aiThe lifecycle hook performs automatic host-data exfiltration to an external endpoint. The absence of credential theft does not make the collection and transmission of identifying host information benign.
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
Installing the package runs its postinstall hook.
Impact
The collector receives host and user identifying information from the installing environment.
Mechanism
The hook builds a report from host information and posts it to the collector over HTTPS.
Attack narrative
Package installation automatically runs a hook that gathers host identifiers and environment details, then posts them to an external collector. The code provides no user-controlled activation step for this transmission.
AI rationale
The lifecycle hook performs automatic host-data exfiltration to an external endpoint. The absence of credential theft does not make the collection and transmission of identifying host information benign.
Evidence
package.jsonpostinstall.js
Network endpoints1
collector.oob.s4yhii.com
Decision evidence
public snapshotAI called this Malicious at 98.0% confidence as Malware with low false-positive risk.
Evidence for block
- package.json runs postinstall.js automatically during installation.
- postinstall.js builds a report containing the host name, user name, home directory, install path, and other host details.
- The hook sends the report by HTTPS POST to collector.oob.s4yhii.com.
- The hook invokes the send path without a user action.
Evidence against
- The inspected code does not show credential collection or shell execution.
Behavioral surface
EnvironmentVarsFilesystemNetwork
NoLicense
Source & flagged code
7 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node ./postinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg10"scripts": {
"postinstall": "node ./postinstall.js"
},
"files": [
"README.md",
"DI
High
Suspicious Lifecycle Evidence
package.json runs postinstall.js automatically during installation.
package.jsonView on unpkg · L10•scripts.postinstall = node ./postinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgpostinstall.jsView file
Findings
6 High3 Medium3 Low
HighInstall Time Lifecycle Scriptspackage.json
HighHost Fingerprint Exfiltrationpostinstall.js
HighKnown Malware Source Similaritypostinstall.js
HighKnown Malware Source Fingerprint Signaturepostinstall.js
HighSuspicious Lifecycle Evidencepackage.json
HighSuspicious Lifecycle Evidencepostinstall.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
LowScripts Present
LowFilesystem
LowNo License
Affected versions and remediation
This report applies to @coopeuch/components@1.999.999.
See all versions of @coopeuch/components for other recorded verdicts.
- Avoid installing @coopeuch/components@1.999.999. 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: .
Source advisory published: .
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