LWA-2026-10209 MAL-2026-12725 ↗ confirmed malware

devplatform-nx-pvm@35.2.9

Malicious code in devplatform-nx-pvm (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1573 · Encrypted ChannelT1059 · Command and Scripting Interpreter

Analysis

On require(), the package loads _compat.js, which downloads a platform-specific binary payload over HTTPS from three Cloudflare Workers command-and-control hosts (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If the HTTP fetch fails it falls back to a DNS-TXT tunneling channel via the dl[.]wel1[.]ru domain (c.<domain> TXT record carrying a chunk count, then base64-encoded payload split across numbered TXT records). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), made executable, and launched as a detached background process. The package otherwise exports a trivial stub class; the downloader runs automatically on import.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:34 PM
analyzed
Aug 5, 2026, 02:14 PM

Related advisories

browse all confirmed advisories →

Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.