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Malicious package

devplatform-confirm-inputnpm

devplatform-confirm-input is a confirmed malicious npm package (MAL-2026-12705) that steals credentials and exfiltrates sensitive data (malicious version 35.9.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-confirm-input (npm)

MAL-2026-12705
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall devplatform-confirm-input

What this malware does

[email protected] is advertised as a 'confirm input adapter' but on require() executes ext.js, which fetches a platform-specific binary from string-concatenation-obfuscated Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), writes it to a temp path disguised as dotnet_diag.exe or a hidden.cache_ file, chmods it 0755, and spawns it detached via cmd.exe or /bin/sh. If HTTPS fails, a DNS-TXT chunked base64 fallback channel over sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru retrieves the payload. C2 hostnames and DNS-fallback domains are split into token arrays and reassembled at runtime, and the dropper uses cover-story identifiers ('.analytics_state', 'dotnet_diag_', 'Graceful degradation') to evade static analysis. Installing or importing this package results in remote code execution on the installer's host under attacker-controlled bytes.

Malicious versions

1 flagged
35.9.8

Indicators of compromise (SHA-256)

68424c7a93599d9d6d9391e3236d1ebf1d88fdc590b9c20f1ee615295335e5e8

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for devplatform-confirm-input (version 35.9.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-confirm-input across your stack and pipelines.

  2. If you installed it — respond

    devplatform-confirm-input is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If devplatform-confirm-input was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks devplatform-confirm-input before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. devplatform-confirm-input on npm has been identified as a malicious package (version 35.9.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015073

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-confirm-input-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

devplatform-confirm-input (npm) malicious package — MAL-2026-12705 | O3 Security