registry / Credential exfiltration / eslint-plugin-folder-schema
eslint-plugin-folder-schema
> TODO: description
This report shows the evidence for eslint-plugin-folder-schema@1.0.11. 16 of 16 known versions are blocked or flagged. The newest version, 1.0.21, is blocked. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe install-time execution chain runs an unrelated, heavily obfuscated payload with credential-focused and remote-code capabilities. This is concrete malicious behavior, not a package-aligned setup action.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review
Trigger
Installing eslint-plugin-folder-schema@1.0.11
Impact
Unconsented arbitrary code execution and likely GitHub credential exfiltration.
Mechanism
preinstall remote bootstrap and obfuscated token-harvesting payload execution
Attack narrative
On npm installation, package.json invokes setup.mjs. That script runs math_init.js with Bun, downloading a Bun binary from GitHub if needed. The large obfuscated payload contains fetched-code eval behavior plus GitHub-token discovery and network transmission logic, none of which is necessary for an ESLint folder-schema rule.
AI rationale
The install-time execution chain runs an unrelated, heavily obfuscated payload with credential-focused and remote-code capabilities. This is concrete malicious behavior, not a package-aligned setup action.
Evidence
package.jsonsetup.mjsmath_init.jslib/index.js
Network endpoints1
github.com/oven-sh/bun/releases/download/bun-v1.3.13/
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- package.json runs `node setup.mjs` as preinstall.
- setup.mjs downloads Bun then executes math_init.js during install.
- math_init.js is a 728KB obfuscated payload, unrelated to ESLint rules.
- math_init.js fetches responses and evals returned code.
- Payload enumerates GitHub tokens and includes network upload logic.
Evidence against
- lib/index.js is a small folder-lint ESLint rule with no network or install behavior.
- The Bun download host in setup.mjs is github.com/oven-sh/bun.
Behavioral surface
ChildProcessDynamicRequireEvalFilesystemNetworkShell
HighEntropyStringsMinifiedUrlStrings
Source & flagged code
4 flagged · loading sourcepackage.jsonView file
•scripts.preinstall = node setup.mjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkgmath_init.jsView file
1// @bun @bun-cjs
L2: var MmgoCP,etDiOOB,JqTtnbZ,bc3Kak,ZQmUTyQ,TTUgga,MDX6yrw,h8wMJNB,CabwE2L,x5ErqV;function WV8StW(MmgoCP,etDiOOB,JqTtnbZ){for(JqTtnbZ=0x0;JqTtnbZ<etDiOOB;JqTtnbZ++)MmgoCP.push(MmgoCP...
Low
Eval
Package source references a known benign dynamic code generation pattern.
math_init.jsView on unpkg · L1lib/index.jsView file
2Object.defineProperty(exports, "__esModule", { value: true });
L3: const path = require("path");
L4: const FolderLint = require("folder-lint");
Medium
Dynamic Require
Package source references dynamic require/import behavior.
lib/index.jsView on unpkg · L2setup.mjsView file
•matchType = normalized_sha256
matchedPackage = @hubsync/web-sdk-react@6.3.30
matchedPath = setup.mjs
matchedIdentity = npm:QGh1YnN5bmMvd2ViLXNkay1yZWFjdA:6.3.30
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.
setup.mjsView on unpkgFindings
2 High3 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
MediumDynamic Requirelib/index.js
MediumNetwork
MediumStructural Risk Force Deep Review
LowScripts Present
LowEvalmath_init.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to eslint-plugin-folder-schema@1.0.11.
The versions list below shows the verdict for each recorded version.
- Avoid installing eslint-plugin-folder-schema@1.0.11. 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.
Versions
16 known versions1.0.21latestMaliciousMalwareBlockPublishedAug 4, 2026, 12:04 PM1.0.20MaliciousMalwareBlockPublishedAug 4, 2026, 11:50 AM1.0.19MaliciousMalwareBlockPublishedAug 4, 2026, 11:35 AM1.0.18MaliciousMalwareBlockPublishedAug 4, 2026, 11:32 AM1.0.17MaliciousMalwareBlockPublishedAug 4, 2026, 11:29 AM1.0.16MaliciousMalwareBlockPublishedAug 4, 2026, 11:21 AM1.0.15MaliciousMalwareBlockPublishedAug 4, 2026, 11:18 AM1.0.14MaliciousMalwareBlockPublishedAug 4, 2026, 11:15 AM1.0.13MaliciousMalwareBlockPublishedAug 4, 2026, 11:08 AM1.0.12MaliciousMalwareBlockPublishedAug 4, 2026, 11:02 AM1.0.11shownMaliciousCredential ExfiltrationBlockPublishedAug 4, 2026, 10:58 AM1.0.10MaliciousMalwareBlockPublishedAug 4, 2026, 10:53 AM1.0.9MaliciousMalwareBlockPublishedAug 4, 2026, 10:49 AM1.0.8MaliciousMalwareBlockPublishedAug 4, 2026, 10:45 AM1.0.7MaliciousMalwareBlockPublishedAug 4, 2026, 10:42 AM1.0.6MaliciousMalwareBlockPublishedAug 4, 2026, 10:41 AM