registry / Credential exfiltration / example-js-project
example-js-project
This report shows the evidence for example-js-project@1.0.11. 10 of 10 known versions are blocked or flagged. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiConcrete install-time execution leads to an obfuscated payload with credential collection and upload behavior. The benign example sources do not justify this installer 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
npm preinstall
Impact
The installer can steal GitHub credentials from the installing machine.
Mechanism
downloads/executes Bun to run obfuscated credential-exfiltration code
Attack narrative
npm invokes setup.mjs during preinstall. It runs math_init.js directly with Bun when available or downloads and executes Bun first. The obfuscated payload enumerates credential sources, explicitly handles GitHub tokens, constructs upload requests, and removes a temporary marker when finished. This behavior is unrelated to the package's example source files.
AI rationale
Concrete install-time execution leads to an obfuscated payload with credential collection and upload behavior. The benign example sources do not justify this installer chain.
Evidence
package.jsonsetup.mjsmath_init.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 setup.mjs as preinstall.
- setup.mjs downloads/executes Bun on install to run math_init.js.
- math_init.js is a 728 KB obfuscated executable payload.
- math_init.js enumerates GitHub tokens and sends collected data through HTTP upload logic.
- Payload runs automatically and suppresses errors/cleans its temporary marker.
Evidence against
- src/ contains only simple example JS/TS/Vue code.
- The Bun release URL in setup.mjs is a real package-aligned bootstrap source, but it is unnecessary for this package.
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 = @hubsync/web-sdk-react@6.3.16
matchedPath = setup.mjs
matchedIdentity = npm:QGh1YnN5bmMvd2ViLXNkay1yZWFjdA:6.3.16
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 = @servicetitan/uikit-docs@22.11.4
matchedPath = setup.mjs
matchedIdentity = npm:[redacted]:22.11.4
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 example-js-project@1.0.11.
The versions list below shows the verdict for each recorded version.
- Avoid installing example-js-project@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
10 known versions1.0.11latestshownMaliciousCredential ExfiltrationBlockPublishedAug 4, 2026, 12:33 PM1.0.10MaliciousMalwareBlockPublishedAug 4, 2026, 11:55 AM1.0.9MaliciousMalwareBlockPublishedAug 4, 2026, 11:43 AM1.0.8MaliciousMalwareBlockPublishedAug 4, 2026, 11:41 AM1.0.7MaliciousMalwareBlockPublishedAug 4, 2026, 11:13 AM1.0.6MaliciousRemote Code ExecutionBlockPublishedAug 4, 2026, 11:05 AM1.0.5MaliciousCredential ExfiltrationBlockPublishedAug 4, 2026, 10:58 AM1.0.4MaliciousMalwareBlockPublishedAug 4, 2026, 10:47 AM1.0.3MaliciousMalwareBlockPublishedAug 4, 2026, 10:45 AM1.0.2MaliciousMalwareBlockPublishedAug 4, 2026, 10:39 AM