registry / nottuff20 / 2.0.0

nottuff20@2.0.0

Republished package

AI Security Review

scanned 2h ago · by lpm-firewall-ai

Opening the package's HTML entry executes an unpinned third-party script and initializes a persistent service-worker proxy. The proxy intercepts browser fetches and forwards requests, WebSockets, and cookies through an unrelated remote endpoint.

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.

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 snapshot

AI 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

Source

ChildProcessDynamicRequireFilesystemNetworkWebSocket

Supply chain

HighEntropyStringsMinifiedObfuscatedProtestwareUrlStrings

Manifest

NoLicense

scanned 24 file(s), 7.27 MB of source, external domains: 127.0.0.1, aomediacodec.github.io, cdn.jsdelivr.net, cloud-api.livekit.io, curl.se, emscripten.org, fingerprint.com, github.com, m1.openfpcdn.io, react.dev, sj-cache.invalid, twemoji.maxcdn.com, www.w3.org, www.zlib.net

Source & flagged code

9 flagged

assets/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 · L1

1patternName = 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 · L1

bfjdx/757lr8.jsView file

Lines 1-31javascript

1(()=>{let e,t;var r,i,n,s,o,a,A={8770(e,t,r){var i={"./":"6418","./client":"6039","./client.ts":"6039","./dom/attr":"8806","./dom/attr.ts":"8806","./dom/beacon":"7265","./dom/beacon.ts":"7265","./dom/cookie":"8227","./dom/cookie.ts":"8227","./dom/css":"8114","./dom/css.ts":"8114","./dom/document":"6820","./dom/document.ts":"6820","./dom/element":"1733","./dom/element.ts":"1733","./dom/fontface":"737","./dom/fontface.ts":"737","./dom/fragments":"2452","./dom/fragments.ts":"2452","./dom/history":"4397","./dom/history.ts":"4397","./dom/open":"5421","./dom/open.ts":"5421","./dom/origin":"8703","./ ...

3// SCRAMJET FUNCTION INTERCEPT

4// target: ${e}

5// frame: ${r}

6// location: ${s}

8function apply(fn, that, args) {

9 return Reflect.apply(fn, that, args);

10}

12function construct(fn, args, newTarget) {

13 return Reflect.construct(fn, args, newTarget);

14}

16return { apply, construct };

18//# 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(a.fn,a.args,a.newTarget))};return(r.construct(a),s)?n:o(a.fn,a.args,a.newTarget)}),r.apply&&(l.apply=(e,t,i)=>{let s,o=!1,a={fn:e,this:t,args:i,newTarget:null,return:e=>{o=!0,s=e},call:()=>(o=!0,s=n(a.fn,a.this,a.args))};if(!this.flagEnabled("debugTrampolines")&&this.flagEnabled("allowFailedIntercepts"))return(r.apply(a),o)?s:n(a.fn,a.this,a.args);let A=g.$D.prepareStackTrace,l=this;g.$D.prepareStackTrace=function(e, ...

19//# 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.arrayBuffer()),o.url,e.context,r.meta,r.isModule);default:return o.body}}},6967(e,t,r){r.d(t,{A4:()=>u});var i=r(3235),n=r(5657),s=r(7492),o=r(4e3),a=r(2967),A=r(7959),l=r(3129),c=r(49),h=r(5994);async function u(e,t){var r;let i,u=(0,s.T)(t,e);if("blob:"===(r=u.url).protocol||"data:"===r.protocol)return d(e,t,u);let m={};if(await l.C.dispatch(e.hooks.fetch.intercept,{request:t,parsed:u},m),m.response)return m.response;i ...

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bfjdx/757lr8.jsView on unpkg · L17

20 background-color: ${{log:"#000",warn:"#f80",error:"#f00",debug:"transparent"}[e]};

21 color: ${{log:"#fff",warn:"#fff",error:"#fff",debug:"gray"}[e]};

22 padding: ${{log:2,warn:4,error:4,debug:0}[e]}px;

23 font-weight: bold;

24 font-family: monospace;

25 font-size: 0.9em;

26 `,`${"debug"===e?"color: gray":""}`,...i)},log:function(e,...t){this.fmt("log",e,...t)},warn:function(e,...t){this.fmt("warn",e,...t)},error:function(e,...t){this.fmt("error",e,...t)},debug:function(e,...t){this.fmt("debug",e,...t)},time(e,t,r){let n,s=(0,i.wU)()-t;n=s<1?"BLAZINGLY FAST":s<500?"decent speed":"really slow",this.print("debug","[time]",`${r} was ${n} (${s.toFixed(2)}ms)`)}}},6372(e,t,r){r.d(t,{c:()=>s});var i=r(5994),n=r(2075);class s{cookies={};byDomain=new Map;defaultPath(e){let t=e.pathname;if(!t||!t.startsWith("/"))return"/";let r=t.lastIndexOf("/");return r<=0?"/":t.slice( ...

27${e}`):`${e}

28${c}`}}if((0,i.U5)("rewriterLogs",r,n.base))for(let e of A.errors)o.error("oxc parse error",e);return c}catch(a){if(o.warn("failed rewriting js for",t||"(unknown)",a.message,"string"!=typeof e?(0,s.hS)(e):e),(0,i.U5)("allowInvalidJs",r,n.base))return e;throw a}}Error.stackTraceLimit=50},

29`:`importScripts("${e}");

30`,c=r.interface.getWorkerInjectScripts(a,A,l),h=(0,n.o)(e,t,r,a,A);if("string"!=typeof h&&(h=(0,s.hS)(h)),(0,i.U5)("encapsulateWorkers",r,a.origin)){let e;h+=`//# sourceURL=${t}`,c+=l((e=h,`data:text/javascript;charset=utf-8;base64,${(0,o.K)(e)}`))}else c+=h;return c}},2075(e,t,r){r.d(t,{Ay:()=>o});let i=new TextEncoder;function n(e){return"string"==typeof e&&!!e.trim()}function s(e){for(let t=0;t<e.length;t++){let r=e.charCodeAt(t);if((r>=0&&r<=31||127===r)&&9!==r)return!0}return!1}let o=function(e){return n(e)?[e].map(e=>(function(e){var t,r,o;let a,A,l,c=e.split(";"),h=c.shift();if(!h||!h.t ...

31//# sourceMappingURL=scramjet.js.map

Long lines were clipped for display.

assets/ChatPage-zoA8Z6RX.jsView file

1(function(_0x31bba3,_0x379132){const _0x159e7b={_0x26fc34:0x358,_0x56fc24:0x70c,_0x216b69:0x578,_0x22d6fc:0x60b,_0x33af41:0x2a6,_0x514b56:0x7f9,_0x4ccc4c:0x9d1,_0x35dd24:0xfdf,_0x1...

High

Obfuscated Payload Loader

Source contains an obfuscator-style string-array loader that reconstructs and executes hidden code.

assets/ChatPage-zoA8Z6RX.jsView on unpkg · L1

•matchType = malicious_source_fingerprint_signature signature = 2d82bc066e3c546d signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = abuden21@2.0.0 matchedPath = assets/ChatPage-zoA8Z6RX.js matchedIdentity = npm:YWJ1ZGVuMjE:2.0.0 similarity = 1.000 shingleOverlap = 14 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.

assets/ChatPage-zoA8Z6RX.jsView on unpkg

bfjdx/w7m632.wasmView file

•path = bfjdx/w7m632.wasm kind = wasm_module sizeBytes = 586279 magicHex = [redacted]

Medium

Ships Wasm Module

Package ships WebAssembly modules.

bfjdx/w7m632.wasmView on unpkg

assets/KaTeX_Script-Regular-D3wIWfF6.woff2View file

•path = assets/KaTeX_Script-Regular-D3wIWfF6.woff2 kind = high_entropy_blob sizeBytes = 9644 magicHex = [redacted]

High

Ships High Entropy Blob

Package ships high-entropy non-source blobs.

assets/KaTeX_Script-Regular-D3wIWfF6.woff2View on unpkg

assets/fingerprint-Y5nV5FVa.jsView file

•matchType = normalized_sha256 matchedPackage = abuden21@2.0.0 matchedPath = assets/fingerprint-Y5nV5FVa.js matchedIdentity = npm:YWJ1ZGVuMjE:2.0.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

assets/fingerprint-Y5nV5FVa.jsView on unpkg

assets/livekit-C0E_jLSz.jsView file

13patternName = generic_password severity = medium line = 13 matchedText = `},e.par...+`\r

Medium

Secret Pattern

Hardcoded password in assets/livekit-C0E_jLSz.js

assets/livekit-C0E_jLSz.jsView on unpkg · L13

Source & flagged code

9 flagged · loading source

assets/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 · L1

1patternName = 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 · L1

bfjdx/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

Dynamic Require

Package source references dynamic require/import behavior.

bfjdx/757lr8.jsView on unpkg · L17

assets/ChatPage-zoA8Z6RX.jsView file

1(function(_0x31bba3,_0x379132){const _0x159e7b={_0x26fc34:0x358,_0x56fc24:0x70c,_0x216b69:0x578,_0x22d6fc:0x60b,_0x33af41:0x2a6,_0x514b56:0x7f9,_0x4ccc4c:0x9d1,_0x35dd24:0xfdf,_0x1...

High

Obfuscated Payload Loader

Source contains an obfuscator-style string-array loader that reconstructs and executes hidden code.

assets/ChatPage-zoA8Z6RX.jsView on unpkg · L1

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

assets/ChatPage-zoA8Z6RX.jsView on unpkg

bfjdx/w7m632.wasmView file

•path = bfjdx/w7m632.wasm kind = wasm_module sizeBytes = 586279 magicHex = [redacted]

Medium

Ships Wasm Module

Package ships WebAssembly modules.

bfjdx/w7m632.wasmView on unpkg

assets/KaTeX_Script-Regular-D3wIWfF6.woff2View file

•path = assets/KaTeX_Script-Regular-D3wIWfF6.woff2 kind = high_entropy_blob sizeBytes = 9644 magicHex = [redacted]

High

Ships High Entropy Blob

Package ships high-entropy non-source blobs.

assets/KaTeX_Script-Regular-D3wIWfF6.woff2View on unpkg

assets/fingerprint-Y5nV5FVa.jsView file

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

assets/fingerprint-Y5nV5FVa.jsView on unpkg

assets/livekit-C0E_jLSz.jsView file

13patternName = generic_password severity = medium line = 13 matchedText = `},e.par...+`\r

Medium

Secret Pattern

Hardcoded password in assets/livekit-C0E_jLSz.js

assets/livekit-C0E_jLSz.jsView on unpkg · L13

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

MediumSecret Patternassets/livekit-C0E_jLSz.js

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

LowNo License

Source & flagged code

9 flagged

assets/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 · L1

1patternName = 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 · L1

bfjdx/757lr8.jsView file

Lines 1-31javascript

3// SCRAMJET FUNCTION INTERCEPT

4// target: ${e}

5// frame: ${r}

6// location: ${s}

8function apply(fn, that, args) {

9 return Reflect.apply(fn, that, args);

10}

12function construct(fn, args, newTarget) {

13 return Reflect.construct(fn, args, newTarget);

14}

16return { apply, construct };

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bfjdx/757lr8.jsView on unpkg · L17

20 background-color: ${{log:"#000",warn:"#f80",error:"#f00",debug:"transparent"}[e]};

21 color: ${{log:"#fff",warn:"#fff",error:"#fff",debug:"gray"}[e]};

22 padding: ${{log:2,warn:4,error:4,debug:0}[e]}px;

23 font-weight: bold;

24 font-family: monospace;

25 font-size: 0.9em;

27${e}`):`${e}

29`:`importScripts("${e}");

31//# sourceMappingURL=scramjet.js.map

Long lines were clipped for display.

assets/ChatPage-zoA8Z6RX.jsView file

1(function(_0x31bba3,_0x379132){const _0x159e7b={_0x26fc34:0x358,_0x56fc24:0x70c,_0x216b69:0x578,_0x22d6fc:0x60b,_0x33af41:0x2a6,_0x514b56:0x7f9,_0x4ccc4c:0x9d1,_0x35dd24:0xfdf,_0x1...

High

Obfuscated Payload Loader

Source contains an obfuscator-style string-array loader that reconstructs and executes hidden code.

assets/ChatPage-zoA8Z6RX.jsView on unpkg · L1

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

assets/ChatPage-zoA8Z6RX.jsView on unpkg

bfjdx/w7m632.wasmView file

•path = bfjdx/w7m632.wasm kind = wasm_module sizeBytes = 586279 magicHex = [redacted]

Medium

Ships Wasm Module

Package ships WebAssembly modules.

bfjdx/w7m632.wasmView on unpkg

assets/KaTeX_Script-Regular-D3wIWfF6.woff2View file

•path = assets/KaTeX_Script-Regular-D3wIWfF6.woff2 kind = high_entropy_blob sizeBytes = 9644 magicHex = [redacted]

High

Ships High Entropy Blob

Package ships high-entropy non-source blobs.

assets/KaTeX_Script-Regular-D3wIWfF6.woff2View on unpkg

assets/fingerprint-Y5nV5FVa.jsView file

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

assets/fingerprint-Y5nV5FVa.jsView on unpkg

assets/livekit-C0E_jLSz.jsView file

13patternName = generic_password severity = medium line = 13 matchedText = `},e.par...+`\r

Medium

Secret Pattern

Hardcoded password in assets/livekit-C0E_jLSz.js

assets/livekit-C0E_jLSz.jsView on unpkg · L13