LWA-2026-10529 MAL-2026-13309 ↗ confirmed malware

dolyame-boxy-desktop-bnpl-text-block@35.9.7

Malicious code in dolyame-boxy-desktop-bnpl-text-block (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1071.004 · DNST1059.003 · Windows Command ShellT1059.004 · Unix Shell

Analysis

On load, the package's index.js requires _platform.js, which acts as a multi-stage dropper. It downloads a platform-specific binary over HTTPS from a rotating list of Cloudflare Workers C2 hosts (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on OS/arch. If the HTTP download fails it falls back to retrieving the payload in base64 chunks via DNS TXT records from c[.]sdk[.]dl[.]wel1[.]ru (and per-platform sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru). The downloaded binary 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 "&" on Unix). A cooldown stamp file (.analytics_state) suppresses repeated execution. The package also ships an 80KB decoy telemetry module to disguise the behaviour.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 04:56 PM
analyzed
Aug 5, 2026, 05:02 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.