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Malicious package

candy-candy-corenpm

candy-candy-core is a confirmed malicious npm package (MAL-2026-12521) that steals credentials and exfiltrates sensitive data (malicious version 35.2.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in candy-candy-core (npm)

MAL-2026-12521
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall candy-candy-core

What this malware does

Requiring candy-candy-core loads index.js which unconditionally requires./polyfill.js. polyfill.js constructs attacker-controlled hostnames by joining string fragments (yielding oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, with DNS-TXT fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), downloads a platform-specific binary via https.get, writes it to /tmp or %TEMP% under decoy filenames (dotnet_diag<hex>.exe on Windows,.cache<hex> on Unix), chmods it 0755, and spawns it detached via spawn("/bin/sh",...) or spawn("cmd",...). A lockfile named analytics_state /.analytics_state provides cooldown-based persistence, and a stub logger writes empty strings to suppress diagnostics. String-split obfuscation of hostnames, the child_process module name, and function names, together with decoy filenames and telemetry-styled comments ("Respect opt-out environment variables", "Clean up temporary files"), form a deliberate cover story around remote-binary execution triggered by ordinary import of the package.

Malicious versions

1 flagged
35.2.7

Indicators of compromise (SHA-256)

f6eb2dd43ce21b00ec40ac6df2c7eee73a20e090d923e5d08c2fd48c01b82eb5

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 candy-candy-core (version 35.2.7). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging candy-candy-core across your stack and pipelines.

  2. If you installed it — respond

    candy-candy-core 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 candy-candy-core 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 candy-candy-core 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. candy-candy-core on npm has been identified as a malicious package (version 35.2.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015248

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks candy-candy-core-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

candy-candy-core (npm) malicious package — MAL-2026-12521 | O3 Security