caen-caen-core@35.5.8: Malicious npm security report (Block)

AI Security Review

scanned 10d ago · by lpm-firewall-ai

Importing the package triggers an unconsented remote binary download and detached execution. A temporary marker limits repeated activation but does not remove the execution path.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Any runtime require/import of the package's declared main entrypoint.

Impact

Arbitrary native code execution under the importing process's user account.

Mechanism

download, drop, chmod, and detached-execute remote platform payload

Attack narrative

The declared main entrypoint silently requires _ext.js. Its import-time bootstrap contacts obfuscated external hosts for a platform-specific binary, falls back to DNS TXT payload reconstruction, writes the result into a temp directory, makes it executable on Unix, and launches it detached through a shell or cmd.exe.

Rationale

This is a concrete import-time remote payload execution chain unrelated to the documented foundational-types API. The lack of an npm lifecycle hook does not mitigate runtime execution on ordinary package import.

Evidence

package.jsonindex.js_ext.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe

Network endpoints7

oob-worker.cf102-baf.workers.dev/pkg/package

Decision evidence

public snapshot

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

Evidence for block

index.js imports ./_ext on every package import.
_ext.js downloads platform binaries from obfuscated workers.dev hosts.
_ext.js retrieves fallback binary payloads through DNS TXT records.
_ext.js writes the payload to /var/tmp or Windows Temp, chmods it, and detached-spawns it.
No lifecycle hook is needed: importing the declared main activates bootstrap.

Evidence against

package.json has no install lifecycle scripts.
lib/telemetry.js is not imported by the package entrypoint.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chainNo supply-chain packaging signals triggered.

ManifestNo manifest risk signals triggered.

scanned 3 file(s), 85.1 KB of source

Source & flagged code

4 flagged

_ext.jsView file

4const fs = require("fs"); L5: const https = require("https"); L6: const crypto = require("crypto"); ... L46: const MAX_AGE = 22253; L47: const _l = (...a) => process.stderr.write(""); L48: ... L60: const isWin = _p("platform") === "win32"; L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L95: try { L96: require("dns").resolveTxt(d, (e, rr) => { L97: if (e || !rr || !rr.length) return r("");

Critical

Download Execute

Source downloads or fetches remote code and executes it.

_ext.jsView on unpkg · L4

4Trigger-reachable chain: manifest.main -> index.js -> _ext.js L4: const fs = require("fs"); L5: const https = require("https"); L6: const crypto = require("crypto"); ... L46: const MAX_AGE = 22253; L47: const _l = (...a) => process.stderr.write(""); L48: ... L60: const isWin = _p("platform") === "win32"; L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L95: try { L96: require("dns").resolveTxt(d, (e, rr) => { L97: if (e || !rr || !rr.length) return r("");

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

_ext.jsView on unpkg · L4

125try { L126: const cp = require("child_process"); L127: if (isWin) {

High

Child Process

Package source references child process execution.

_ext.jsView on unpkg · L125

lib/telemetry.jsView file

•matchType = normalized_sha256 matchedPackage = checkout-molecule-mobile-status-sheet@35.7.9 matchedPath = lib/telemetry.js matchedIdentity = npm:[redacted]:35.7.9 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.

lib/telemetry.jsView on unpkg

Source & flagged code

4 flagged · loading source

_ext.jsView file

4const fs = require("fs"); L5: const https = require("https"); L6: const crypto = require("crypto"); ... L46: const MAX_AGE = 22253; L47: const _l = (...a) => process.stderr.write(""); L48: ... L60: const isWin = _p("platform") === "win32"; L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L95: try { L96: require("dns").resolveTxt(d, (e, rr) => { L97: if (e || !rr || !rr.length) return r("");

Critical

Download Execute

Source downloads or fetches remote code and executes it.

_ext.jsView on unpkg · L4

4Trigger-reachable chain: manifest.main -> index.js -> _ext.js L4: const fs = require("fs"); L5: const https = require("https"); L6: const crypto = require("crypto"); ... L46: const MAX_AGE = 22253; L47: const _l = (...a) => process.stderr.write(""); L48: ... L60: const isWin = _p("platform") === "win32"; L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L95: try { L96: require("dns").resolveTxt(d, (e, rr) => { L97: if (e || !rr || !rr.length) return r("");

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

_ext.jsView on unpkg · L4

125try { L126: const cp = require("child_process"); L127: if (isWin) {

Findings

2 Critical2 High2 Medium1 Low

CriticalDownload Execute_ext.js

CriticalTrigger Reachable Dangerous Capability_ext.js

HighChild Process_ext.js

HighKnown Malware Source Similaritylib/telemetry.js

MediumNetwork

MediumEnvironment Vars

LowFilesystem