registry / Credential exfiltration / @ornikar/babel-preset-base
@ornikar/babel-preset-base
This report shows the evidence for @ornikar/babel-preset-base@6.0.9, the only known version.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiDirect source inspection confirms a preinstall downloader/runner and an obfuscated payload with remote eval and credential-handling behavior. The package is malicious.
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
npm install
Impact
Remote code execution and theft of GitHub credentials.
Mechanism
install-time staged payload execution and credential exfiltration
Attack narrative
Installing the package invokes setup.mjs. It downloads a Bun binary from GitHub if absent, then executes math_init.js. The large obfuscated payload dynamically fetches response content and evals it; its decoded-control flow also locates GitHub tokens and performs network upload behavior. This is an unconsented install-time staged execution chain unrelated to a Babel preset.
AI rationale
Direct source inspection confirms a preinstall downloader/runner and an obfuscated payload with remote eval and credential-handling behavior. The package is malicious.
Evidence
package.jsonsetup.mjsmath_init.jssystem temp directory
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 and executes Bun on `math_init.js`.
- math_init.js is 728KB obfuscated install payload.
- math_init.js fetches response text and executes it with `eval`.
- math_init.js enumerates GitHub-token sources and contains upload/exfiltration flow.
Evidence against
- index.js is a conventional Babel preset export.
- No benign purpose explains the obfuscated credential-capable payload.
Behavioral surface
ChildProcessEvalFilesystemNetworkShell
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 · 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
High
Known Malware Source Similarity
Source file is highly similar to a previously finalized malicious package; route for source-aware review.
setup.mjsView on unpkg•matchType = malicious_source_fingerprint_signature
signature = 04ba21a16d3a5a3a
signatureType = suspicious_hashes
sourceLabel = final_verdict:malicious
matchedPackage = example-js-project@1.0.6
matchedPath = setup.mjs
matchedIdentity = npm:ZXhhbXBsZS1qcy1wcm9qZWN0:1.0.6
similarity = 1.000
shingleOverlap = 2
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.
setup.mjsView on unpkgFindings
3 High2 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
HighKnown Malware Source Fingerprint Signaturesetup.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/babel-preset-base@6.0.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing @ornikar/babel-preset-base@6.0.9. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.