registry / Credential exfiltration / @nebula.js/sn-action-button
@nebula.js/sn-action-button
Action button supernova
This report shows the evidence for @nebula.js/sn-action-button@2.3.1. 1 of 2 known versions is blocked or flagged. The newest version, 2.5.0, is allowed. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe malicious preinstall chain executes an obfuscated payload with credential-oriented and network behavior. The legitimate bundled component code does not justify it.
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 remote transmission of developer credentials or tokens.
Mechanism
preinstall downloader executing obfuscated credential-harvesting payload
Attack narrative
During npm preinstall, setup.mjs obtains Bun if absent and runs math_init.js. That unrelated, 727 KB obfuscated script uses filesystem, subprocess, temporary-file, token, and network logic; its decoded control flow references GitHub token credential types. This is a concrete install-time execution chain outside the package's stated action-button purpose.
AI rationale
The malicious preinstall chain executes an obfuscated payload with credential-oriented and network behavior. The legitimate bundled component code does not justify it.
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 preinstall: node setup.mjs.
- setup.mjs downloads Bun 1.3.13 then executes math_init.js at install time.
- math_init.js is a 727 KB heavily obfuscated payload, unrelated to an action-button component.
- math_init.js imports child_process and contains credential/token handling including ghtoken, ghs_old, and ghs_jwt flows.
- Payload creates temporary files, runs subprocesses, and performs obfuscated network requests.
Evidence against
- dist/ and core/ contain the expected Qlik/Nebula action-button implementation.
- README.md documents normal component installation and use.
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 · L1core/esm/index.jsView file
8/*! javascript-number-formatter - v1.1.11 - http://mottie.github.com/javascript-number-formatter/ * © ecava */
L9: e.exports=function(e,t){if(!e||isNaN(+t))return t;var o,a,n,r,i,s,l,c,u,d,h=e.length,p=e.search(/[0-9\-\+#]/),g=p>0?e.substring(0,p):"",m=e.split("").reverse().join(""),f=m.search(...
Findings
2 High3 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similaritysetup.mjs
MediumDynamic Requirecore/esm/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 @nebula.js/sn-action-button@2.3.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing @nebula.js/sn-action-button@2.3.1. 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: .
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