LWA-2026-10523 MAL-2026-13131 ↗ confirmed malware

dolyame-boxy-stories@35.9.7

Malicious code in dolyame-boxy-stories (npm)

T1105 · Ingress Tool TransferT1059 · Command and Scripting InterpreterT1071.001 · Web ProtocolsT1102 · Web ServiceT1059.007 · JavaScript

Analysis

On require, the package downloads a platform-specific second-stage binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf103-070[.]workers[.]de, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) with a DNS-TXT fallback channel via wel1[.]ru resolver domains (sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded payload is written to a temp file (/var/tmp/.cache_<hex> on Unix, %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c '... &'. A stamp file in /tmp or %TEMP% throttles re-execution. The package ships a large decoy analytics module to pad its size.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 03:51 PM
analyzed
Aug 5, 2026, 05:03 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.