LWA-2026-10148 MAL-2026-12859 ↗ confirmed malware

blocks-sahred-atom-mobile-app-bar-action@35.6.8

Malicious code in blocks-sahred-atom-mobile-app-bar-action (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1082 · System Information DiscoveryT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web Service

Analysis

On require(), the package loads _bridge.js, which fingerprints the OS/architecture and downloads a second-stage binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe per platform). If the HTTPS download fails it falls back to a DNS-TXT channel that reassembles a base64 payload from TXT records under 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 %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched detached via /bin/sh -c "file &" or cmd.exe /c start /b. A state stamp is written to /tmp/.analytics_state (or %TEMP%\analytics_state) to throttle re-execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:02 PM
analyzed
Aug 5, 2026, 01:35 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.