registry / @pilllesss/yorn / 1.0.265

@pilllesss/yorn@1.0.265

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

Source inspection shows a bundled, user-invoked AI coding CLI with no registry-install lifecycle hook. The scanner's clipboard and environment findings map to interactive application features, not a concrete malicious chain.

Static reason

High-risk behavior combination matched malicious policy.; 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 relevant agent or screenshot features.

Impact

The CLI can act on user-selected inputs and configured credentials, but no unconsented install-time execution or exfiltration was found.

Mechanism

Interactive coding-agent functions, including optional shell, network, clipboard, and screenshot support.

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 has no install, preinstall, or postinstall hook; its only lifecycle hook is prepublishOnly.
The executable is a user-invoked CLI entry point, not an import-time package entry point.
The bundled CLI includes interactive confirmation handling.

Evidence against

The large bundled CLI accesses environment variables, network services, and subprocesses when users invoke its coding-agent features.
Included screenshot helpers can capture the screen, but the macOS helper explains and requests system permission first.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsMinified

ManifestNo manifest risk signals triggered.

scanned 0 file(s), 256 KB of source

Oversized source lightweight scan

Source & flagged code

17 flagged

dist/yorn.cjsView file

22\r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[tzS.build(["ngth",tzS.build(["content-","le"]... L24: `)}function e0B(e){return e.map(e=>"text"===e.type?e.text:"thinking"===e.type?e.thinking:`${e.name}:${JSON.stringify(e.arguments)}`).join(` ... L29: `:return"\\n";case`\r`:return"\\r";case" ":return"\\t";default:return`\\u${e.codePointAt(0)?.toString(16).padStart(4,"0")??"0000"}`}}function e04(e){let t="",i=!1;for(let r=0;r<e.l... L30: `){return"string"==typeof e?e:e.filter(e=>"text"===e.type).map(e=>e.text).join(t)}function e2l(e,t){return Kh.Unsafe({type:"string",enum:e,...t?.description&&{description:t.descrip... L31: `),i=e.UseUnevaluated()?[tzS.build(["t conte","CheckCont","cons","{})",

Critical

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution with blocking evidence.

dist/yorn.cjsView on unpkg · L22

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 eDK(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: ${eU0(e)}`);if(null==s)throw new Il(`missing choices[${r}].tool_calls[${i}].type ... L22: \r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[tzS.build(["ngth",tzS.build(["content-","le"]... L24: `)}function e0B(e){return

Critical

Credential Exfiltration

Source appears to send environment or credential material to an external endpoint.

dist/yorn.cjsView on unpkg · L2

Critical

Clipboard Crypto Hijack

Source reads and rewrites clipboard contents matching cryptocurrency wallet addresses.

dist/yorn.cjsView on unpkg · L2

2Trigger-reachable chain: manifest.bin -> dist/yorn.cjs 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... L4: `),u.push(e),u.push(`\r ... L7: `),u.push(`\r L8: `)}u.push(null)}),u}async function eDK(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: ${eU0(e)}`);if(null==s)throw new Il(`missing choices[${r}].tool_calls[${i}].type ... L22: \r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[tzS.build(["ngth",tzS.bui

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

dist/yorn.cjsView on unpkg · L2

High

Child Process

Package source references child process execution.

dist/yorn.cjsView on unpkg · L22

•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[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[tzS.build(["ngth",tzS.build(["content-","le"]... `)}function e0q(e,t){let i=Math.min(e.length,t.length),r=0;for(;r<i&&e[r]===t[r];)r++;return r}function e0H(e,t,i,r){let n=e0G(t),s=e0L(n),l=e0L(e0B(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 e2l(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

20`,e,`\r L21: `)),r.push(`--${i}--`),new t(r,{type:tzS.build(["oundar","m-data; b","rt/for","multipa","y="],[3,2,1,0,4])+i})}function eB_(e){let t=e.match(/\bfilename=("(.*?)"|([^()<>@,;:\\"/[\]... L22: \r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[tzS.build(["ngth",tzS.build(["content-","le"]... L24: `)}function e0B(e){return e.map(e=>"text"===e.type?e.text:"thinking"===e.type?e.thinking:`${e.name}:${JSON.stringify(e.arguments)}`).join(` ... L29: `:return"\\n";case`\r`:return"\\r";case" ":return"\\t";default:return`\\u${e.codePointAt(0)?.toString(16).padStart(4,"0")??"0000"}`}}function e04(e){let t="",i=!1;for(let r=0;r<e.l... L30: `){return"string"==typeof e?e:e.filter(e=>"text"===e.type)

High

Command Output Exfiltration

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

dist/yorn.cjsView on unpkg · L20

High

Cloud Metadata Access

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

dist/yorn.cjsView on unpkg · L2

2Trigger-reachable credential exfiltration chain: manifest.bin -> dist/yorn.cjs 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... L4: `),u.push(e),u.push(`\r ... L7: `),u.push(`\r L8: `)}u.push(null)}),u}async function eDK(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: ${eU0(e)}`);if(null==s)throw new Il(`missing choices[${r}].tool_calls[${i}].type ... L22: \r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[t

High

Trigger Reachable Credential Exfiltration

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

dist/yorn.cjsView on unpkg · L2

20Trigger-reachable command-output exfiltration chain: manifest.bin -> dist/yorn.cjs L20: `,e,`\r L21: `)),r.push(`--${i}--`),new t(r,{type:tzS.build(["oundar","m-data; b","rt/for","multipa","y="],[3,2,1,0,4])+i})}function eB_(e){let t=e.match(/\bfilename=("(.*?)"|([^()<>@,;:\\"/[\]... L22: \r L23: `),n=!1,s=!1;e.on("response",e=>{let{headers:t}=e;n="chunked"===t[tzS.build(["coding",tzS.build(["transfer-e","n"],[0,1])],[1,0])]&&!t[tzS.build(["ngth",tzS.build(["content-","le"]... L24: `)}function e0B(e){return e.map(e=>"text"===e.type?e.text:"thinking"===e.type?e.thinking:`${e.name}:${JSON.stringify(e.arguments)}`).join(` ... L29: `:return"\\n";case`\r`:return"\\r";case" ":return"\\t";default:return`\\u${e.codePointAt(0)?.toString(16).padStart(4,"0")??"0000"}`}}function e04(e){let t="",i=!1;f

High

Trigger Reachable Command Output Exfiltration

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

dist/yorn.cjsView on unpkg · L20

•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 = 8071738 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 = 8071738 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

17 flagged · loading source

dist/yorn.cjsView file

Critical

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution with blocking evidence.

dist/yorn.cjsView on unpkg · L22

Findings

4 Critical9 High7 Medium4 Low

CriticalSame File Env Network Executiondist/yorn.cjs

CriticalCredential Exfiltrationdist/yorn.cjs

CriticalClipboard Crypto Hijackdist/yorn.cjs

CriticalTrigger Reachable Dangerous Capabilitydist/yorn.cjs

HighChild Processdist/yorn.cjs

HighCredential Redirect Persistencedist/yorn.cjs

HighCommand Output Exfiltrationdist/yorn.cjs

HighCloud Metadata Accessdist/yorn.cjs

HighTrigger Reachable Credential Exfiltrationdist/yorn.cjs

HighTrigger Reachable Command Output Exfiltrationdist/yorn.cjs

HighSemantic Analysis Limiteddist/yorn.cjs

High

Affected versions and remediation

This report applies to @pilllesss/yorn@1.0.265.

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

Review the evidence and your use of @pilllesss/yorn@1.0.265 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 00:15:11.275Z (UTC).

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