contracts-upgradeable@1.0.0
contracts-upgradeable
AI Security Review
scanned 3d ago · by lpm-firewall-aiThe package automatically sends the installing machine’s hostname and OS username to a hard-coded Discord webhook during preinstall. This is unrelated data collection without installer consent, so the package is malicious.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review
Trigger
Automatically during npm installation through the preinstall lifecycle script.
Impact
The webhook operator receives identifying information about the installing machine and user without their consent.
Mechanism
preinstall.js reads the hostname and OS username, then POSTs them in a message to the webhook.
Attack narrative
On installation, npm runs preinstall.js. The hook collects the machine hostname and OS username and sends them to a hard-coded Discord webhook, then writes a local marker file. This is unsolicited install-time data exfiltration.
AI rationale
The package automatically sends the installing machine’s hostname and OS username to a hard-coded Discord webhook during preinstall. This is unrelated data collection without installer consent, so the package is malicious.
Evidence
package.jsonpreinstall.js.preinstall-marker.json
Network endpoints1
canary.discord.com/api/webhooks/1566232728179843243/pM5rDIrCRrEpQRbA7ibaiQk1XOQlIftmBacA5s8jD8NvXn5W-rS832DOWHQS-G-j3N6U
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- package.json runs `node preinstall.js` as an install-time preinstall hook.
- preinstall.js hard-codes a Discord webhook URL.
- The hook builds a message containing the machine hostname and OS username.
- The hook POSTs that message to the webhook without an explicit user request.
- The hook runs automatically when executed as the main module.
Evidence against
- index.js only exports a function that returns a static availability string.
Behavioral surface
EnvironmentVarsFilesystem
HighEntropyStringsUrlStrings
NoLicense
Source & flagged code
9 flaggedpackage.jsonView file
•scripts.preinstall = node preinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.preinstall = node preinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgpreinstall.jsView file
6L7: const WEBHOOK_URL = 'https://canary.discord.[redacted]-rS832DOWHQS-G-j3N6U';
L8:
...
L18: writeMarker = marker => fs.writeFileSync(
L19: path.join(__dirname, '.preinstall-marker.json'),
L20: JSON.stringify(marker, null, 2) + '\n'
...
L22: } = {}) {
L23: const message = `Run on ${os.hostname()} as ${os.userInfo().username} at ${timestamp()}`;
L24:
...
L26: package: 'cutekitten-test',
L27: event: process.env.npm[redacted] || 'manual',
L28: timestamp: new Date().toISOString(),
Findings
3 Critical5 High3 Medium5 Low
CriticalHardcoded Runtime Data Exfiltrationpreinstall.js
CriticalCredential Exfiltrationpreinstall.js
CriticalTrigger Reachable Dangerous Capabilitypreinstall.js
HighInstall Time Lifecycle Scriptspackage.json
HighFixed Authenticated Webhook Data Exfiltrationpreinstall.js
HighTrigger Reachable Credential Exfiltrationpreinstall.js
HighKnown Malware Source Similaritypreinstall.js
HighKnown Malware Source Fingerprint Signaturepreinstall.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
Affected versions and remediation
This report applies to contracts-upgradeable@1.0.0.
See all versions of contracts-upgradeable for other recorded verdicts.
- Avoid installing contracts-upgradeable@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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.