LWA-2026-10136 MAL-2026-12855 ↗ confirmed malware

bigops-watchdog-angular@35.4.8

Malicious code in bigops-watchdog-angular (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1027 · Obfuscated Files or Information

Analysis

On require, the package loads a bundled dropper that fingerprints the host platform/architecture and downloads a platform-specific second-stage binary from a rotating set of Cloudflare Workers endpoints (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTP downloads fail it retrieves the payload via DNS TXT records from c[.]sdk[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c <path> & on Unix).

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:00 PM
analyzed
Aug 5, 2026, 01:29 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.