registry / Remote code execution / nottuff20
nottuff20
Republished package
This report shows the evidence for nottuff20@2.0.0. 3 of 4 known versions are blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThis is not a benign library artifact: the package auto-executes third-party remote code and installs a browser request-routing proxy to unrelated infrastructure. No install hook is needed for the browser-runtime attack surface.
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
A user opens or serves `index.html` in a browser.
Impact
The remote script can run with the page origin's browser privileges; the installed service worker can proxy subsequent in-scope browser requests and expose proxied traffic/cookies to the configured backend.
Mechanism
Remote script execution plus service-worker-based web proxy routing.
Attack narrative
The declared HTML entry automatically imports an unpinned script from `c.vipersfutbol.com`. On startup, local code registers a service worker that intercepts fetches and uses the bundled Scramjet-style transport to relay arbitrary HTTP/WebSocket traffic and cookie updates through `wss://21baseballacademy.com/fairs/`. This is a concrete remote-control and traffic-interception chain activated merely by opening the package's entry page.
AI rationale
This is not a benign library artifact: the package auto-executes third-party remote code and installs a browser request-routing proxy to unrelated infrastructure. No install hook is needed for the browser-runtime attack surface.
Evidence
index.htmlassets/boot-CVPGRFHh.jsj6k3y8.jsct1tl/csbzam.jsct1tl/jmqwjq.jsct1tl/pap3do.jspackage.json
Network endpoints3
c.vipersfutbol.com/script.jswss://21baseballacademy.com/fairs/www.googletagmanager.com/gtag/js?id=G-0VL3ZSBXDH
Decision evidence
public snapshotAI called this Malicious at 98.0% confidence as Malware with low false-positive risk.
Evidence for block
- `index.html` auto-loads remote `https://c.vipersfutbol.com/script.js` without integrity.
- `assets/boot-CVPGRFHh.js` registers `j6k3y8.js` service worker during app startup.
- `j6k3y8.js` intercepts fetch events and routes them through bundled proxy code.
- `assets/boot-CVPGRFHh.js` configures proxy traffic to `wss://21baseballacademy.com/fairs/`.
- `ct1tl/csbzam.js` forwards arbitrary HTTP requests, WebSockets, and cookies through the service-worker transport.
- `package.json` presents a minimal republished package whose `main` is the executable web page.
Evidence against
- No npm `preinstall`, `install`, or `postinstall` hook exists.
- No Node child-process, local credential-file harvesting, or AI-agent configuration mutation was confirmed.
Behavioral surface
ChildProcessDynamicRequireFilesystemNetworkWebSocket
HighEntropyStringsMinifiedObfuscated
Source & flagged code
9 flagged · loading sourceassets/proxy-runtime-1NyFshf9.jsView file
1patternName = aws_access_key
severity = critical
line = 1
matchedText = var OQ=O...B+=`
Critical
Critical Secret
Package contains a critical-looking secret pattern.
assets/proxy-runtime-1NyFshf9.jsView on unpkg · L11patternName = aws_access_key
severity = critical
line = 1
matchedText = var OQ=O...B+=`
Critical
Secret Pattern
AWS access key ID in assets/proxy-runtime-1NyFshf9.js
assets/proxy-runtime-1NyFshf9.jsView on unpkg · L1bfjdx/757lr8.jsView file
17L18: //# sourceURL=${A}`)();n=c,o=l}else n=g.z$,o=g.Mt;r.construct&&(l.construct=function(e,t,i){let n,s=!1,a={fn:e,this:null,args:t,newTarget:i,return:e=>{s=!0,n=e},call:()=>(s=!0,n=o(...
L19: //# sourceURL=${r.url.href}`),n}return o.body;case"style":return(0,i.sM)(await o.text(),e.context,r.meta);case"sharedworker":case"worker":return(0,i.iP)(new Uint8Array(await o.arra...
Medium
Findings
2 Critical5 High6 Medium4 Low
CriticalCritical Secretassets/proxy-runtime-1NyFshf9.js
CriticalSecret Patternassets/proxy-runtime-1NyFshf9.js
HighObfuscated Payload Loaderassets/ChatPage-zoA8Z6RX.js
HighObfuscated
HighShips High Entropy Blobassets/KaTeX_Script-Regular-D3wIWfF6.woff2
HighKnown Malware Source Similarityassets/fingerprint-Y5nV5FVa.js
HighKnown Malware Source Fingerprint Signatureassets/ChatPage-zoA8Z6RX.js
MediumDynamic Requirebfjdx/757lr8.js
MediumNetwork
MediumProtestware
MediumShips Wasm Modulebfjdx/w7m632.wasm
MediumStructural Risk Force Deep Review
Medium
Affected versions and remediation
This report applies to nottuff20@2.0.0.
The versions list below shows the verdict for each recorded version.
- Avoid installing nottuff20@2.0.0. 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.