registry / Credential exfiltration / picasso.js
picasso.js
A charting library streamlined for building visualizations for the Qlik Sense Analytics platform.
This report shows the evidence for picasso.js@2.11.6, the only known version.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThis is concrete install-time execution of an obfuscated payload that targets GitHub credentials, unrelated to the published charting library. The explicit bootstrapper and payload form a malicious chain.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review
Trigger
npm preinstall
Impact
GitHub credentials may be collected and sent off-host during dependency installation.
Mechanism
Bun-bootstrapped obfuscated credential harvesting and network exfiltration
Attack narrative
npm runs setup.mjs before installation. That script invokes an existing Bun executable or downloads one from GitHub, then runs the hidden math_init.js payload. Static inspection shows the obfuscated payload uses filesystem, OS, child-process, and outbound-request functionality while enumerating GitHub token material, establishing an unconsented credential-harvesting chain.
AI rationale
This is concrete install-time execution of an obfuscated payload that targets GitHub credentials, unrelated to the published charting library. The explicit bootstrapper and payload form a malicious 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 defines preinstall: node setup.mjs.
- setup.mjs downloads Bun and executes math_init.js during install.
- math_init.js is a 728KB obfuscated credential-harvesting payload.
- math_init.js imports child_process/fs/os/path and contains fetch-based outbound handling.
- Payload enumerates GitHub token fields including ghtoken, ghs_old, and ghs_jwt.
Evidence against
- dist/picasso.js is a charting-library bundle and does not contain the install payload.
- The explicit Bun download URL is a legitimate host, but it bootstraps the hidden 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
1Manifest entrypoint (scripts.preinstall) carries capability families absent from dist/build output: execution+network
L1: #!/usr/bin/env node
L2: import { execFileSync } from "child_process";
L3: import _0x488df8 from "fs";
L4: import _0x52943e from "https";
L5: import _0x24db8d from "os";
...
L50: function ra() {
L51: const _0x51cd53 = process.platform + "-" + process.arch;
L52: const _0x3ab5c4 = PM[_0x51cd53];
...
L218: } else if (_0xc0d7d2 === 8) {
L219: _0x27994e = _0x548d91.inflateRawSync(_0x5975df);
L220: } else {
Findings
3 High2 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighEntrypoint Build Divergencesetup.mjs
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 picasso.js@2.11.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing picasso.js@2.11.6. 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.