registry / Credential exfiltration / @ornikar/typed-css-modules-loader
@ornikar/typed-css-modules-loader
Webpack loader for typed-css-modules
This report shows the evidence for @ornikar/typed-css-modules-loader@0.8.7. 11 of 11 known versions are blocked or flagged. The newest version, 0.8.12, is blocked. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe package contains a concrete, unconsented install-time credential-harvesting chain, concealed behind an obfuscated payload and external runtime bootstrap. Its legitimate loader entrypoint does not justify this behavior.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review
Trigger
npm preinstall
Impact
Theft and misuse of developer GitHub/npm credentials, potentially enabling repository or package compromise.
Mechanism
Bun-downloaded obfuscated credential-harvesting payload
Attack narrative
On preinstall, setup.mjs downloads or invokes Bun and runs math_init.js. That large obfuscated script immediately invokes its main routine, discovers credential sources, processes GitHub token variants and npm tokens, and uses network-capable request code to transmit results. This behavior is unrelated to a CSS-modules webpack loader.
AI rationale
The package contains a concrete, unconsented install-time credential-harvesting chain, concealed behind an obfuscated payload and external runtime bootstrap. Its legitimate loader entrypoint does not justify this behavior.
Evidence
package.jsonsetup.mjsmath_init.jsindex.jsREADME.md
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 setup.mjs via preinstall.
- setup.mjs downloads Bun, then executes math_init.js during installation.
- math_init.js is a 728KB obfuscated payload with a top-level jsTXVr() invocation.
- math_init.js enumerates credential providers and explicitly handles ghtoken, ghs_old, ghs_jwt, and npmtoken.
- The payload uses filesystem, child_process, and network request primitives to collect and transmit data.
Evidence against
- index.js is a conventional typed-css-modules webpack loader.
- README.md describes only the loader; it does not document the install-time Bun downloader or payload.
Behavioral surface
ChildProcessEvalFilesystemNetworkShell
HighEntropyStringsMinifiedUrlStrings
Source & flagged code
3 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 · L1setup.mjsView file
•matchType = normalized_sha256
matchedPackage = rwc-client@0.29.14
matchedPath = setup.mjs
matchedIdentity = npm:cndjLWNsaWVudA:0.29.14
similarity = 1.000
summary = normalized source hash matched finalized malicious source
Findings
2 High2 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
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 @ornikar/typed-css-modules-loader@0.8.7.
The versions list below shows the verdict for each recorded version.
- Avoid installing @ornikar/typed-css-modules-loader@0.8.7. 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: .
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