chai-utils-test
This report shows the evidence for chai-utils-test@4.5.5. 6 of 6 known versions are blocked or flagged. See all versions.
This package appears in our research on the fake chai plugin campaign, with how it works, the full package list and what to do if you installed it.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-5748 confirms this npm version as malicious.
Advisory
MAL-2026-5748
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in chai-utils-test (npm)
Details
Package name 'chai-utils-test' impersonates the popular 'chai' assertion library and ships a cloned chai source tree. The declared main (index.js) calls a top-level launcher that spawns `node lib/chai/utils/assertion.js` as a detached child process with `stdio:'ignore'` and `child.unref()`, so the dropper survives the parent and produces no visible output. The child uses axios to GET https://statecheck.ddns.net/api/scanner.js (a dynamic-DNS host) with a base64-encoded `key=YWRtaW46c2VjcmV0MTIz` query parameter (likely a server-side gate for staged payload delivery), then runs the response body via `new Function('require', s)(require)` — granting the attacker-served code full Node `require()` access. The package also pre-installs a `global.atob` polyfill backed by `Buffer.from(x,'base64').toString('utf8')` in preparation for the fetched payload. Net effect: any developer or CI job that requires/imports this package executes attacker-controlled code from a mutable remote endpoint with full Node privileges.
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to chai-utils-test@4.5.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing chai-utils-test@4.5.5. 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: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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