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Malicious package

devplatform-spa-plugin-abilitynpm

devplatform-spa-plugin-ability is a confirmed malicious npm package (MAL-2026-12759) that executes malicious code on install (malicious version 35.5.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in devplatform-spa-plugin-ability (npm)

MAL-2026-12759
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall devplatform-spa-plugin-ability

What this malware does

On require of the package, index.js loads bootstrap.js which downloads a platform-specific native binary from anonymous Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT covert-channel fallback under *.dl.wel1.ru (chunk count in c.<domain>, N shards concatenated and base64-decoded into an executable buffer). Hostnames are assembled at runtime by joining split string fragments (e.g. ["oob-worker.cf102-baf.worke","rs.d","ev"].join("")). The fetched binary is written to disguised paths (/var/tmp/.cache<hex>, %TEMP%\dotnet_diag_<hex>.exe, /pkg/package.exe|-arm64|loader_mac), chmod 0755, and spawned detached via /bin/sh -c or cmd /c start with no hash or signature verification. A lib/telemetry.js decoy file and an.analytics_state rate-limit stamp plus DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK env-var gates provide cover-story framing; the delivered payload is unrelated to the package's stated purpose (an "SPA plugin ability SDK"). Installing or requiring this package executes attacker-controlled code on the installer host.

Malicious versions

1 flagged
35.5.2

Indicators of compromise (SHA-256)

c9753b327ec0ed7c7cf204951dd0c1db47db31c79fde8ffad042e8658bb0dc81

Detection & response playbook

Malicious package

  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for devplatform-spa-plugin-ability (version 35.5.2). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-spa-plugin-ability across your stack and pipelines.

  2. If you installed it — respond

    Remove devplatform-spa-plugin-ability from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If devplatform-spa-plugin-ability 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-spa-plugin-ability 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-spa-plugin-ability on npm has been identified as a malicious package (version 35.5.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015012

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks devplatform-spa-plugin-ability-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
devplatform-spa-plugin-ability (npm) malicious package — MAL-2026-12759 | O3 Security