registry / Remote code execution / nottuff3
nottuff3
Republished package
This report shows the evidence for nottuff3@2.0.0. 3 of 3 known versions are blocked or flagged. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe package contains a concrete remote-code loader and automatic persistent browser traffic-routing mechanism unrelated to its declared package identity. Although it has no npm install hook, the runtime behavior is malicious enough to block.
Static reason
One or more suspicious static signals were detected.
Trigger
User opens `index.html` or renders the packaged SVG/HTML content in a browser.
Impact
Remote operator-controlled code can run in the browser context and proxied browsing traffic can persist through the installed service worker.
Mechanism
Remote script execution plus persistent service-worker proxy routing.
Attack narrative
This npm package presents itself as `nottuff3` but ships a browser proxy application. On opening its HTML entrypoint, it executes an external script from `c.vipersfutbol.com`, boots a WebSocket proxy to `21baseballacademy.com`, and registers a service worker that intercepts routed fetches. The remote script is not pinned or included in the package, so its operator can alter browser-executed behavior after publication; the service worker extends that control beyond a single request.
AI rationale
The package contains a concrete remote-code loader and automatic persistent browser traffic-routing mechanism unrelated to its declared package identity. Although it has no npm install hook, the runtime behavior is malicious enough to block.
Evidence
package.jsonindex.htmlassets/boot-CVPGRFHh.jsj6k3y8.jsbfjdx/757lr8.jsassets/ChatPage-zoA8Z6RX.jsct1tl/jmqwjq.jsct1tl/pap3do.jsct1tl/csbzam.jsbfjdx/w7m632.wasmlogo.svgindex.svg
Network endpoints2
c.vipersfutbol.com/script.jswss://21baseballacademy.com/fairs/
Decision evidence
public snapshotAI called this Malicious at 97.0% confidence as Malware with low false-positive risk.
Evidence for block
- `index.html` automatically loads remote code from `https://c.vipersfutbol.com/script.js`.
- `assets/boot-CVPGRFHh.js` registers `j6k3y8.js` as a service worker at runtime.
- `j6k3y8.js` intercepts qualifying browser fetches and routes them through bundled proxy code.
- `assets/boot-CVPGRFHh.js` configures a WebSocket proxy at `wss://21baseballacademy.com/fairs/`.
- `bfjdx/757lr8.js` and `bfjdx/w7m632.wasm` provide a bundled WASM-backed proxy/network runtime.
- `assets/ChatPage-zoA8Z6RX.js` is heavily obfuscated, concealing runtime behavior.
Evidence against
- `package.json` has no preinstall, install, postinstall, or other lifecycle scripts.
- No Node filesystem, shell, credential-harvesting, or AI-agent configuration writes were found.
- The package payload activates when its browser entrypoint is opened, not during npm installation.
Behavioral surface
ChildProcessDynamicRequireFilesystemNetworkWebSocket
Source & flagged code
7 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 Critical3 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
MediumDynamic Requirebfjdx/757lr8.js
MediumNetwork
MediumProtestware
MediumShips Wasm Modulebfjdx/w7m632.wasm
MediumStructural Risk Force Deep Review
MediumSecret Patternassets/livekit-C0E_jLSz.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to nottuff3@2.0.0.
The versions list below shows the verdict for each recorded version.
- Avoid installing nottuff3@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.