registry / ishowfeet19 / 2.0.0

ishowfeet19@2.0.0

Republished package

AI Security Review

scanned 3h ago · by lpm-firewall-ai

Opening the package's declared `index.html` executes a remote third-party script and automatically installs a service-worker proxy. The proxy claims clients, routes selected browser fetches, and syncs cookies while using a remote WebSocket transport.

Static reason

One or more suspicious static signals were detected.

Trigger

Opening `index.html` in a browser.

Impact

A remote operator can change executed code; the proxy can intercept routed browser requests and handle cookies.

Mechanism

Remote script execution plus automatic service-worker traffic and cookie proxying.

Attack narrative

Although npm installation itself has no lifecycle hook, the declared HTML entrypoint immediately imports an externally hosted script, then the app automatically registers a service worker. That worker claims browser clients and sends routed requests through an embedded Scramjet-style proxy configured with a WebSocket endpoint on an unrelated host. Its injected client includes cookie synchronization with the service worker. This creates an unconsented, remotely controllable browser interception surface, with obfuscation reducing auditability.

Rationale

The package is a browser payload, not a normal npm library: opening its main entrypoint causes remote code execution and automatic browser traffic/cookie proxying. This is concrete malicious runtime behavior despite the lack of install hooks.

Evidence

package.jsonindex.htmlassets/boot-CVPGRFHh.jsj6k3y8.jsct1tl/csbzam.jsct1tl/jmqwjq.jsbfjdx/757lr8.jsbfjdx/w7m632.wasm

Network endpoints2

c.vipersfutbol.com/script.jswss://21baseballacademy.com/fairs/

Decision evidence

public snapshot

AI called this Malicious at 93.0% confidence as Malware with low false-positive risk.

Evidence for block

`index.html` auto-loads `https://c.vipersfutbol.com/script.js`.
`assets/boot-CVPGRFHh.js` registers `j6k3y8.js` without user action.
`j6k3y8.js` claims clients and routes fetches through `_19vij0x`.
`assets/boot-CVPGRFHh.js` configures proxy WebSocket `wss://21baseballacademy.com/fairs/`.
`ct1tl/csbzam.js` synchronizes proxied cookies through the service worker.
Obfuscated primary app assets conceal the automatic boot path.

Evidence against

`package.json` contains no preinstall/install/postinstall hooks.
No Node filesystem, shell, or environment-harvesting behavior was found.
No explicit credential-exfiltration request was identified in inspected sources.

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

7 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

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/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

7 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

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/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 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

LowNo License

Source & flagged code

7 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

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/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