LWA-2026-10220 MAL-2026-13275 ↗ confirmed malware

devplatform-zod-wip-api@35.9.3

Malicious code in devplatform-zod-wip-api (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1071.004 · DNS

Analysis

On require, the package downloads and executes a remote binary. It beacons to four Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) over HTTPS GET /pkg/package (platform variants /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-TXT-chunked fallback retrieval channel from c[.]sdk[.]dl[.]wel1[.]ru. The fetched payload is written to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "file &" on Unix). A marker file /tmp/.analytics_state throttles repeat execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:40 PM
analyzed
Aug 5, 2026, 02:19 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.