LWA-2026-10198 MAL-2026-12702 ↗ confirmed malware

devplatform-cli-plugin-lint@35.5.1

Malicious code in devplatform-cli-plugin-lint (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information Discovery

Analysis

On require, the package executes a bundled bootstrap that downloads and runs a platform-specific binary. It fingerprints the OS/architecture, then fetches a payload over HTTPS from shuffled Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the download fails it reconstructs the payload from DNS TXT records queried against c[.]sdk[.]dl[.]wel1[.]ru (and c[.]ext[.]dl[.]wel1[.]ru / c[.]pkg[.]dl[.]wel1[.]ru / c[.]net[.]dl[.]wel1[.]ru). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under TEMP on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "path &" on Unix). A state file (.analytics_state / analytics_state) throttles repeat downloads.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:32 PM
analyzed
Aug 5, 2026, 02:09 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.