registry / @pilllesss/yorn / 1.0.267

@pilllesss/yorn@1.0.267

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The scanner signals correspond to a large bundled AI coding-agent CLI with normal provider, filesystem, shell, and screenshot functionality. Its manifest has no registry install lifecycle hook or self-dependency, and inspection found no concrete automatic exfiltration or persistence chain.

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 runs the yorn command and selects its provider, configuration, or screenshot features.

Impact

The package can manage its own local settings and send requests to a provider selected through the CLI; no automatic credential theft or install-time mutation was confirmed.

Mechanism

User-invoked coding-agent configuration and provider credential handling.

AI rationale

Decision evidence

public snapshot

AI called this Clean at 86.0% confidence as Benign with medium false-positive risk.

Evidence for AI clean decision

The manifest exposes a command-line binary and has only a publish-time build script, not an install hook.
The bundled command line exposes configuration, update, and credential commands, so it has user-invoked local-agent capabilities.

Evidence against

No preinstall, install, or postinstall lifecycle script is declared.
There is no runtime dependency on this package's own name.
The screenshot helpers are explicit scripts that save captures locally and request macOS permission transparently.
No automatic credential export or unconsented project-wide mutation was confirmed by source inspection.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsMinified

ManifestNo manifest risk signals triggered.

scanned 0 file(s), 256 KB of source

Source & flagged code

13 flagged

dist/yorn.cjsView file

22\r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzT.build(["coding",tzT.build(["transfe","r-en"],[0,1])],[1,0])]&&!t[tzT.build(["cont",tzT.build(["ent-","length"]... L24: `)}function e0$(e){return e.map(e=>"text"===e.type?e.text:"thinking"===e.type?e.thinking:`${e.name}:${JSON.stringify(e.arguments)}`).join(`

High

Child Process

Package source references child process execution.

dist/yorn.cjsView on unpkg · L22

311`)||"";n.block.thinking=s||o||n.block.thinking,n.block.thinkingSignature=JSON.stringify(e),a.set(e.id,n.block),i.push({type:tzT.build(["ng_end","thinki"],[1,0]),contentIndex:n.cont... L312: `),n=e.input.includes("image")?r.content.filter(e=>"image"===e.type):[],s=t.length>0,l=n.length>0,a=tbR(e.id),o=s?eUe(t):l?tzT.build(["(see at","d image)","tache"],[0,2,1]):"",u=n.... L313: `).trim();if(!t)return;if("[DONE]"===t)return eau;let i=JSON.parse(t);if(!tpy(i)||!Array.isArray(i.choices))throw Error(tzT.build([tzT.build(["Invali","d Mis"],[0,1]),"g ev","ent",... ... L326: `)}if(e)break}if(r.trim()){let e=tmz(r);e&&(yield e)}}finally{i.releaseLock()}}function tmz(e){let t=e.split(` L327: `).find(e=>e.startsWith("data:"))?.slice(5).trim();if(t&&"[DONE]"!==t)try{return JSON.parse(t)}catch{re

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/yorn.cjsView on unpkg · L311

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. dist/yorn.cjs: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzT.build(["coding",tzT.build(["transfe","r-en"],[0,1])],[1,0])]&&!t[tzT.build(["cont",tzT.build(["ent-","length"]... `)}function e0H(e,t){let i=Math.min(e.length,t.length),r=0;for(;r<i&&e[r]===t[r];)r++;return r}function e0W(e,t,i,r){let n=e0q(t),s=e0F(n),l=e0F(e0$(e.content)),a=s,o=0,u=0,d=i?.se... `){return"string"==typeof e?e:e.filter(e=>"text"===e.type).map(e=>e.text).join(t)}function e2a(e,t){return Kh.Unsafe({type:"string",enum:e,...t?.description&&{description:t.descrip... --api-key <key> API key (defaults to env vars) # Print a prov

High

Credential Redirect Persistence

Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.

dist/yorn.cjsView on unpkg

High

Command Output Exfiltration

Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.

dist/yorn.cjsView on unpkg · L311

2globalThis.__yorn_dynamic_import = (m) => import(m); L3: var e,t,i,r,n,s,l,a,o,u,d,c,h,b,p,m,f,g,_,y,E,S,v,A,w,T,C,I,x,R,O,k,N,P,M,D,L,F,U,B,$,j,G,q,H,W,V,K,Y,z,Q,J,X,Z,ee,et,ei,er,en,es,el,ea,eo,eu,ed,ec,eh,eb,ep,em,ef,eg,e_,ey,eE,eS,ev... L4: `),u.push(e),u.push(`\r ... L7: `),u.push(`\r L8: `)}u.push(null)}),u}async function eDY(e,t){let i=0,r=[],n=e.getReader(),s=!1;for(;!s;){let{done:e,value:l}=await n.read();if(l&&(r.push(l),i+=l?.byteLength??0),i>=t)break;s=e}n.re... L9: ${eU2(e)}`);if(null==s)throw new Il(`missing choices[${r}].tool_calls[${i}].type ... L22: \r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzT.build(["coding",tzT.build(["transfe","r-en"],[0,1])],[1,0])]&&!t[tzT.build(["cont",tzT.build(["ent-","length"]... L24: `)}function e0$(e){return

High

Cloud Metadata Access

Source reaches cloud instance metadata or link-local credential endpoints.

dist/yorn.cjsView on unpkg · L2

311Trigger-reachable command-output exfiltration chain: manifest.bin -> dist/yorn.cjs L311: `)||"";n.block.thinking=s||o||n.block.thinking,n.block.thinkingSignature=JSON.stringify(e),a.set(e.id,n.block),i.push({type:tzT.build(["ng_end","thinki"],[1,0]),contentIndex:n.cont... L312: `),n=e.input.includes("image")?r.content.filter(e=>"image"===e.type):[],s=t.length>0,l=n.length>0,a=tbR(e.id),o=s?eUe(t):l?tzT.build(["(see at","d image)","tache"],[0,2,1]):"",u=n.... L313: `).trim();if(!t)return;if("[DONE]"===t)return eau;let i=JSON.parse(t);if(!tpy(i)||!Array.isArray(i.choices))throw Error(tzT.build([tzT.build(["Invali","d Mis"],[0,1]),"g ev","ent",... ... L326: `)}if(e)break}if(r.trim()){let e=tmz(r);e&&(yield e)}}finally{i.releaseLock()}}function tmz(e){let t=e.split(` L327: `).find(e=>e.startsW

High

Trigger Reachable Command Output Exfiltration

A manifest entrypoint or package-local install chain reaches command-output exfiltration behavior.

dist/yorn.cjsView on unpkg · L311

•stage = ast_semantic_analysis; reason = ast_path_work_budget_exceeded; limitedFiles = 1

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/yorn.cjsView on unpkg

•matchType = normalized_sha256 matchedPackage = @pilllesss/yorn@1.0.262 matchedPath = dist/yorn.cjs matchedIdentity = npm:QHBpbGxsZXNzcy95b3Ju:1.0.262 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.

dist/yorn.cjsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = f5544ecd80b66e25 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @pilllesss/yorn@1.0.262 matchedPath = dist/yorn.cjs matchedIdentity = npm:QHBpbGxsZXNzcy95b3Ju:1.0.262 similarity = 1.000 shingleOverlap = 3 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.

dist/yorn.cjsView on unpkg

1#!/usr/bin/env node L2: globalThis.__yorn_dynamic_import = (m) => import(m); L3: var e,t,i,r,n,s,l,a,o,u,d,c,h,b,p,m,f,g,_,y,E,S,v,A,w,T,C,I,x,R,O,k,N,P,M,D,L,F,U,B,$,j,G,q,H,W,V,K,Y,z,Q,J,X,Z,ee,et,ei,er,en,es,el,ea,eo,eu,ed,ec,eh,eb,ep,em,ef,eg,e_,ey,eE,eS,ev...

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/yorn.cjsView on unpkg · L1

•path = dist/yorn.cjs kind = oversized_source_file sizeBytes = 8074870 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

dist/yorn.cjsView on unpkg

•path = dist/yorn.cjs kind = oversized_cli_entrypoint sizeBytes = 8074870 magicHex = [redacted]

Medium

Oversized Cli Entrypoint

Package contains an oversized executable-looking CLI entrypoint.

dist/yorn.cjsView on unpkg

dist/skills/screenshot/scripts/take_screenshot.pyView file

•path = dist/skills/screenshot/scripts/take_screenshot.py kind = build_helper sizeBytes = 19659 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

dist/skills/screenshot/scripts/take_screenshot.pyView on unpkg

Source & flagged code

13 flagged · loading source

dist/yorn.cjsView file

High

Child Process

Package source references child process execution.

dist/yorn.cjsView on unpkg · L22

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/yorn.cjsView on unpkg · L311

Findings

9 High7 Medium4 Low

HighChild Processdist/yorn.cjs

HighSame File Env Network Executiondist/yorn.cjs

HighCredential Redirect Persistencedist/yorn.cjs

HighCommand Output Exfiltrationdist/yorn.cjs

HighCloud Metadata Accessdist/yorn.cjs

HighTrigger Reachable Command Output Exfiltrationdist/yorn.cjs

HighSemantic Analysis Limiteddist/yorn.cjs

HighKnown Malware Source Similaritydist/yorn.cjs

HighKnown Malware Source Fingerprint Signaturedist/yorn.cjs

MediumDynamic Requiredist/yorn.cjs

MediumNetwork

MediumEnvironment Vars

MediumShips Build Helper

Affected versions and remediation

This report applies to @pilllesss/yorn@1.0.267.

See all versions of @pilllesss/yorn for other recorded verdicts.

Review the evidence and your use of @pilllesss/yorn@1.0.267 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-09-05 00:31:35.651Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.