LWA-2026-10438 MAL-2026-12688 ↗ confirmed malware

delivery-ci-validate@35.1.4

Malicious code in delivery-ci-validate (npm)

T1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information Discovery

Analysis

On load, the package downloads and executes a second-stage binary. It fingerprints the host platform/arch, then fetches a payload over HTTPS from Cloudflare Workers endpoints oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS is blocked it falls back to a DNS TXT chunked transfer from c[.]sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under TEMP on Windows), made executable, and launched detached via /bin/sh -c or cmd.exe /c start /b. A state file in /tmp or TEMP throttles repeat downloads.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:31 PM
analyzed
Aug 5, 2026, 04:22 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.