LWA-2026-10321 MAL-2026-13244 ↗ confirmed malware

bigops-products-savings-accounts@35.3.7

Malicious code in bigops-products-savings-accounts (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1059 · Command and Scripting InterpreterT1071.001 · Web ProtocolsT1102 · Web ServiceT1573 · Encrypted ChannelT1082 · System Information Discovery

Analysis

On require, the package downloads a platform-specific second-stage binary over HTTPS from Cloudflare Workers hosts oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-over-TXT fallback via c[.]sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru. It writes the downloaded payload to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), makes it executable, and launches it as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "<file> &" on Unix).

analyzed by
Leitwacht
first seen
Aug 5, 2026, 02:25 PM
analyzed
Aug 5, 2026, 03:40 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.