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devplatform-react-micro-frontend@35.2.1: Malicious npm security | LPM Firewall

registry / devplatform-react-micro-frontend / 35.2.1

devplatform-react-micro-frontend@35.2.1

OSV Malicious Advisory

scanned 10d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-12737 confirms this npm version as malicious. devplatform-react-micro-frontend@35.2.1 is a lure package whose main entry auto-loads _adapter.js on require. _adapter.js selects a platform-specific asset, downloads an opaque binary over HTTPS from a rotating list of Cloudflare *.workers.dev hosts (oob-worker.cf101-adf.workers.dev and siblings cf100/cf102/cf103), and if HTTPS fails reassembles up to 2000 numbered TXT records under *.dl.wel1.ru into a base64...

Advisory

MAL-2026-12737

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in devplatform-react-micro-frontend (npm)

Details

devplatform-react-micro-frontend@35.2.1 is a lure package whose main entry auto-loads _adapter.js on require. _adapter.js selects a platform-specific asset, downloads an opaque binary over HTTPS from a rotating list of Cloudflare *.workers.dev hosts (oob-worker.cf101-adf.workers.dev and siblings cf100/cf102/cf103), and if HTTPS fails reassembles up to 2000 numbered TXT records under *.dl.wel1.ru into a base64 payload. The bytes are written to a temp path under a masquerading name (.cache_<hex>, dotnet_diag_<hex>.exe), chmod 755 on POSIX, and spawned detached via /bin/sh -c or cmd. Network destinations are assembled by joining substring arrays (e.g. ["oob-worker.cf101-a","df.workers.","dev"].join(""), ['sdk.dl.w','el1.','ru'].join("")) to evade static analysis. A duplicate dropper is shipped as lib/telemetry.js framed as an "Analytics SDK", using string-concat obfuscation of require("child_"+"process") and fs["chmod"+"Sync"] to reach the same write-chmod-spawn sink. Installing or requiring the package results in remote-controlled binary execution on the host.

Decision reason

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

References

OSV advisory PACKAGE

Source & flagged code

4 flagged · loading source

_adapter.jsView file

2L3: const https = require("https"); L4: const os = require("os"); ... L44: const MAX_AGE = 23117; L45: const _l = (...a) => process.stderr.write(""); L46: ... L56: const isWin = _p("platform") === "win32"; L57: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L58: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L90: try { L91: require("dns").resolveTxt(d, (e, rr) => { L92: if (e || !rr || !rr.length) return r("");

Critical

Download Execute

Source downloads or fetches remote code and executes it.

_adapter.jsView on unpkg · L2

2Trigger-reachable chain: manifest.main -> index.js -> _adapter.js L2: L3: const https = require("https"); L4: const os = require("os"); ... L44: const MAX_AGE = 23117; L45: const _l = (...a) => process.stderr.write(""); L46: ... L56: const isWin = _p("platform") === "win32"; L57: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp"; L58: return path.join(dir, isWin ? "analytics_state" : ".analytics_state"); ... L90: try { L91: require("dns").resolveTxt(d, (e, rr) => { L92: 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.

_adapter.jsView on unpkg · L2

118try { L119: const cp = require("child_process"); L120: if (isWin) {

High

Child Process

Package source references child process execution.

_adapter.jsView on unpkg · L118

lib/telemetry.jsView file

•matchType = normalized_sha256 matchedPackage = devplatform-npm[redacted]@35.5.9 matchedPath = lib/telemetry.js matchedIdentity = npm:[redacted]:35.5.9 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