tinkoff-mutual-mgm-form@20.2.9

Analysis

Package tinkoff-mutual-mgm-form (version 20.2.9) is a combosquat of the Tinkoff bank name. On require(), it downloads a platform-specific binary payload from Cloudflare Workers C2 infrastructure (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) via HTTPS GET to paths like /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on OS/arch. If HTTPS fails, it falls back to DNS-based retrieval using TXT records from c[.]tin[.]dl[.]well1[.]site (and related subdomains) to reconstruct a base64-encoded binary in chunks. The downloaded binary is written to /var/tmp/.cache_<random> (or %TEMP%\dotnet_diag_<random>.exe on Windows) and executed as a detached background process with stdio ignored. A cache stamp mechanism prevents re-downloading for ~5.7 hours. The payload can be suppressed by setting DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, or DO_NOT_TRACK environment variables.