LWA-2026-10422 MAL-2026-12730 ↗ confirmed malware

devplatform-nx-ts@35.1.3

Malicious code in devplatform-nx-ts (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1573 · Encrypted ChannelT1082 · System Information Discovery

Analysis

On require, the package downloads a platform-specific binary over HTTPS from four Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-TXT fallback channel (c[.]sdk[.]dl[.]wel1[.]ru) that reassembles the payload from base64 TXT records. The downloaded payload is written to a hidden cache file (.cache_<hex> in /var/tmp, or dotnet_diag_<hex>.exe in the Windows temp dir), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c '... &' on Unix). The package is a stub whose only real behaviour is this remote binary download-and-execute.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:36 PM
analyzed
Aug 5, 2026, 04:14 PM

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