MAL-2026-13073

    Dashboard / Malicious Package / MAL-2026-13073

    MAL-2026-13073

    Published: 5 Aug 2026Last Modified: 5 Aug 2026

    Summary: Malicious code in boxy-mops (npm)

    Details: Source: amazon-inspector (d377c600e4c23a91ca7b5c4465804849e0427d7f14392877ad961244142fe477) On require(), boxy-mops loads _compat.js, which assembles attacker-controlled hostnames from split string fragments (resolving to oob-worker.cf1XX-XXX.workers.dev and the *.dl.wel1.ru family: sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), performs an HTTPS GET for a platform-specific binary, writes the bytes under disguised names (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows) into /tmp or %TEMP%, chmods the file 0755, and detach-spawns it via /bin/sh -c or cmd.exe /c start with unref(). A DNS TXT chunked fallback channel is present for exfiltration/instruction retrieval when HTTPS is blocked. Runtime string reconstruction is used to hide destination hosts from static inspection; a DISABLE_TELEMETRY / DO_NOT_TRACK environment guard suppresses execution on analyst machines; a /tmp/.analytics_state cache stamp gates repeat runs. The advertised 'telemetry/analytics' framing does not match the observed behavior — the package fetches and executes opaque non-publisher binaries on the installer's host at import time.

    References: https://www.npmjs.com/package/boxy-mops/v/35.2.9

    Affected packages

    Package

    Name: boxy-mops

    Purl: pkg:npm/boxy-mops

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    35.2.9
    MAL-2026-13073 | CVE-DB