registry / Credential exfiltration / @ornikar/jest-config
@ornikar/jest-config
✅ jest config
This report shows the evidence for @ornikar/jest-config@13.0.4. 11 of 11 known versions are blocked or flagged. The newest version, 13.0.13, is blocked. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiConcrete install-time execution of an obfuscated credential-oriented network payload is malicious. The normal Jest files do not mitigate that behavior.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review
Trigger
npm install
Impact
Potential theft and misuse of GitHub credentials on the installing host.
Mechanism
preinstall downloader executes obfuscated credential-handling payload
Attack narrative
Installation invokes setup.mjs. It executes math_init.js through Bun if available, otherwise downloads a Bun binary from GitHub and executes the payload. The large obfuscated payload imports process, filesystem, child-process, and HTTP(S) capabilities; its visible control flow collects GitHub-token categories and performs network requests. This is unrelated to a Jest configuration package and creates an unconsented install-time credential-exfiltration chain.
AI rationale
Concrete install-time execution of an obfuscated credential-oriented network payload is malicious. The normal Jest files do not mitigate that behavior.
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 `node setup.mjs` as preinstall.
- setup.mjs downloads Bun from GitHub when absent, then executes math_init.js.
- math_init.js is a 728KB heavily obfuscated executable payload.
- math_init.js imports child_process, fs, os, path, http, and https.
- Payload enumerates `ghtoken`, `ghs_old`, and `ghs_jwt` credential categories and sends HTTP requests.
Evidence against
- Documented Jest entrypoints are ordinary test-configuration helpers.
- No benign package function explains the preinstall downloader and concealed credential-handling payload.
Behavioral surface
ChildProcessEnvironmentVarsEvalFilesystemNetworkShell
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 · L1bin/test-coverage.shView file
•path = bin/test-coverage.sh
kind = build_helper
sizeBytes = 300
magicHex = [redacted]
Medium
Findings
2 High4 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
MediumNetwork
MediumEnvironment Vars
MediumShips Build Helperbin/test-coverage.sh
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/jest-config@13.0.4.
The versions list below shows the verdict for each recorded version.
- Avoid installing @ornikar/jest-config@13.0.4. 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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