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OpenAdvisories
Malicious MAL-2026-12561

checkout-desktop-total

npm package · versions 35.6.1

Reported Aug 5, 2026 · Updated Aug 17, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

The package executes a hidden loader when it is imported. The loader downloads and runs a platform-specific native payload from attacker-controlled Cloudflare Workers hosts, or reconstructs the payload from DNS TXT records under `wel1.ru` if HTTPS delivery fails. Systems that imported this package should be considered compromised; rotate accessible secrets and investigate temporary-file execution and DNS activity to the listed infrastructure.

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Source: amazon-inspector (4b44040d21c83b93de2969a5a19e4180519e6bf99acc1d39476087a31379cc0b)
On require of index.js, _platform.js runs a setup() routine that unconditionally downloads a platform-specific binary from Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT fallback channel under *.dl.wel1.ru (c.<domain> returns a chunk count, N.<domain> returns base64 chunks that are concatenated and decoded). Host literals are split into arrays and joined at runtime to evade grep-based scanning. The downloaded bytes are written to a disguised path — '.cache_<rand>' under /tmp on Unix, 'dotnet_diag_<rand>.exe' under %TEMP% on Windows — chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b with windowsHide:true. An on-disk marker '.analytics_state' is written. The package name and its deceptive filenames impersonate benign tooling; there is no legitimate reason for a 'checkout-desktop-total' library entry to fetch and execute an opaque binary from a Cloudflare Workers host on import.

Indicators of compromise

Shown defanged and not clickable. Search any indicator to find other packages using it.

Domains