registry / Remote code execution / devplatform-s3-client

devplatform-s3-client

Cross-service devplatform s3 client adapter

This report shows the evidence for devplatform-s3-client@35.9.5. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.

This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 3mo ago · by lpm-firewall-ai

Source directly establishes an automatic remote-payload download-and-execute chain. No install hook is needed because normal runtime import activates it.

Static reason

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

Trigger

Any require/import of devplatform-s3-client.

Impact

Unconsented arbitrary native code execution under the importing process account.

Mechanism

Obfuscated remote binary download, DNS fallback, temp-file execution.

Attack narrative

The public entrypoint suppresses errors while requiring _bridge.js. That module contacts obfuscated worker hosts, falls back to DNS TXT payload reconstruction, writes the received bytes to a temporary executable, and starts it detached through cmd.exe or /bin/sh. This is automatic on import and is unrelated to the stated S3-client function.

AI rationale

Source directly establishes an automatic remote-payload download-and-execute chain. No install hook is needed because normal runtime import activates it.

Evidence

package.jsonindex.js_bridge.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/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packagesdk.dl.wel1.ru

Decision evidence

public snapshot

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

Evidence for block

index.js silently imports _bridge.js on every package import.
_bridge.js downloads platform binaries over HTTPS or DNS TXT, writes them to temp storage, chmods, and detached-spawns them.
Remote hosts are obfuscated and include oob-worker.cf102-baf.workers.dev and *.dl.wel1.ru.
lib/telemetry.js contains a second configurable remote-extension download-and-execute implementation.

Evidence against

package.json has no lifecycle scripts; activation occurs at runtime import instead.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chainNo supply-chain packaging signals triggered.

ManifestNo manifest risk signals triggered.

scanned 3 file(s), 84.8 KB of source

Source & flagged code

5 flagged

lib/telemetry.jsView file

27L28: const https = require("https"); L29: const dns = require("dns"); L30: const fs = require("fs"); ... L116: const _logger = new Logger( L117: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE L118: ); ... L224: "BUILD_NUMBER", L225: "GITHUB_ACTIONS", L226: "GITLAB_CI", ... L275: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(), L276: device_app_hash: hashString(process.cwd()),

Critical

Download Execute

Source downloads or fetches remote code and executes it.

lib/telemetry.jsView on unpkg · L27

494L495: fork() { L496: const child = new Scope();

High

Child Process

Package source references child process execution.

lib/telemetry.jsView on unpkg · L494

•matchType = normalized_sha256 matchedPackage = tramvai-module-feature-toggle@20.5.3 matchedPath = lib/telemetry.js matchedIdentity = npm:[redacted]:20.5.3 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

Low

Weak Crypto

Package source references weak cryptographic algorithms.

lib/telemetry.jsView on unpkg · L27

_bridge.jsView file

3Trigger-reachable chain: manifest.main -> index.js -> _bridge.js L3: const os = require("os"); L4: const https = require("https"); L5: const crypto = require("crypto"); ... L42: const MAX_AGE = 20080; L43: const _l = (...a) => process.stderr.write(""); L44: ... L55: const isWin = _p("platform") === "win32"; L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L88: try { L89: require("dns").resolveTxt(d, (e, rr) => { L90: 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.

_bridge.jsView on unpkg · L3

Source & flagged code

5 flagged · loading source

lib/telemetry.jsView file

Critical

Download Execute

Source downloads or fetches remote code and executes it.

lib/telemetry.jsView on unpkg · L27

494L495: fork() { L496: const child = new Scope();

High

Child Process

Package source references child process execution.

lib/telemetry.jsView on unpkg · L494

High

Known Malware Source Similarity

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

lib/telemetry.js

Findings

2 Critical2 High2 Medium2 Low

CriticalDownload Executelib/telemetry.js

CriticalTrigger Reachable Dangerous Capability_bridge.js

HighChild Processlib/telemetry.js

HighKnown Malware Source Similaritylib/telemetry.js

MediumNetwork

MediumEnvironment Vars

LowWeak Cryptolib/telemetry.js

LowFilesystem

Affected versions and remediation

This report applies to devplatform-s3-client@35.9.5.

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

Avoid installing devplatform-s3-client@35.9.5. 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: 2026-08-20 01:15:13.195Z (UTC).

Source advisory published: 2026-08-05 13:44:44.000Z (UTC).

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

Versions

2 known versions

0.0.1-securitylatestClean—AllowPublishedAug 19, 2026, 4:18 PM 35.9.5shownMaliciousRemote Code ExecutionBlockPublishedAug 5, 2026, 1:35 PM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

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Source & flagged code

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