MAL-2026-12704
Dashboard / Malicious Package / MAL-2026-12704
MAL-2026-12704
Summary: Malicious code in devplatform-cli-spa (npm)
Details: Source: amazon-inspector (1bb41284069ba395bf67ceb847dc579c7a79c753ea89107116e91559ebbece2a) On require('devplatform-cli-spa'), index.js loads _support.js which selects a payload by OS and architecture, downloads a native binary over HTTPS from string-obfuscated Cloudflare Workers hostnames (oob-worker.cf1-01-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT base64 fallback served from *.dl.wel1.ru. The fetched bytes are written to /tmp/.cache_<rnd> on Unix or %TEMP%/dotnet_diag_<rnd>.exe on Windows, chmod'd to 0755, and executed detached via spawn('/bin/sh', ['-c',...]) or spawn('cmd', ['/c', 'start',...]). The C2 hostnames and the DNS fallback domains are assembled at runtime by joining split string fragments (_NODES and _DNS_HOSTS arrays) to evade static string matching. The Windows drop path uses a 'dotnet_diag' decoy filename, and a stamp file gates re-runs across installs.
Affected packages
Package
Name: devplatform-cli-spa
Purl: pkg:npm/devplatform-cli-spa
Affected ranges
Type: N/A
Events:
