registry / Remote code execution / chai-redirection
chai-redirection
chai-redirection
This report shows the evidence for chai-redirection@0.0.3. 3 of 3 known versions are blocked or flagged. The newest version, 0.0.4, is blocked. 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.
AI Security Review
scanned 4mo ago · by lpm-firewall-aiSource inspection confirms unconsented import-time background execution and remote dynamic code execution unrelated to the advertised chai assertions. This is concrete malicious behavior, not a noisy scanner finding.
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
Requiring/importing package main index.js
Impact
Arbitrary remote code can run in the consumer environment with package process privileges.
Mechanism
detached child process fetches and evals remote payload
Attack narrative
When a consumer loads chai-redirection, index.js immediately spawns lib/caller.js as a detached Node process. That helper retrieves code from jsonkeeper.com and executes fields from the response using new Function/Function.constructor with require exposed. A second endpoint is assembled from config constants and can also execute a returned token on 404, making the package a remote payload loader hidden behind a chai plugin facade.
AI rationale
Source inspection confirms unconsented import-time background execution and remote dynamic code execution unrelated to the advertised chai assertions. This is concrete malicious behavior, not a noisy scanner finding.
Evidence
package.jsonindex.jslib/caller.js
Network endpoints1
jsonkeeper.com/b/O3JR0
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js runs callCallerAsOrigin() at import time, spawning detached node lib/caller.js with stdio ignored.
- lib/caller.js fetches https://jsonkeeper.com/b/O3JR0 and executes res.data.cookie via new Function with require.
- lib/caller.js also builds DEV_API_CHECK_DOMAIN + aspath + token and executes error.response.data.token on 404 via Function.constructor.
- package.json main is index.js, so requiring the chai plugin triggers the background payload.
- Dependencies include axios/request/sqlite3 unrelated to visible chai assertion functionality.
Evidence against
- package.json has no npm lifecycle hooks, so payload is import-time rather than install-time.
- Visible exported API contains chai assertion helpers for JWT/password/URL/email/string validation.
- No AI-agent control-surface writes found in inspected files.
Behavioral surface
ChildProcessEnvironmentVarsEvalNetwork
HighEntropyStrings
Source & flagged code
5 flagged · loading sourceindex.jsView file
3const path = require('path');
L4: const { spawn } = require('child_process');
L5:
High
3Cross-file remote execution chain: index.js spawns lib/caller.js; helper contains network access plus dynamic code execution.
L3: const path = require('path');
L4: const { spawn } = require('child_process');
L5:
...
L7: function callCallerAsOrigin() {
L8: const script = path.resolve(__dirname, 'lib/caller.js');
L9: const child = spawn(process.execPath, [script], {
...
L62: const [headerRaw, payloadRaw] = parts;
L63: const header = JSON.parse(Buffer.from(headerRaw, 'base64url').toString('utf8'));
L64: const payload = JSON.parse(Buffer.from(payloadRaw, 'base64url').toString('utf8'));
High
Cross File Remote Execution Context
Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking.
index.jsView on unpkg · L3•matchType = normalized_sha256
matchedPackage = chai-redirection@0.0.1
matchedPath = index.js
matchedIdentity = npm:Y2hhaS1yZWRpcmVjdGlvbg:0.0.1
similarity = 1.000
summary = normalized source hash matched finalized malicious source
High
Known Malware Source Similarity
Findings
5 High2 Medium3 Low
HighChild Processindex.js
HighEvallib/caller.js
HighCross File Remote Execution Contextindex.js
HighKnown Malware Source Similarityindex.js
HighKnown Malware Source Fingerprint Signatureindex.js
MediumNetwork
MediumEnvironment Vars
LowScripts Present
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to chai-redirection@0.0.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing chai-redirection@0.0.3. 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.