devplatform-rest-resources-v1npm
devplatform-rest-resources-v1 is a confirmed malicious npm package (MAL-2026-12745) that steals credentials and exfiltrates sensitive data (malicious version 35.2.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in devplatform-rest-resources-v1 (npm)
What this malware does
On require() of the package, index.js loads bootstrap.js which selects a platform-specific endpoint, fetches an opaque native binary over HTTPS from author-controlled Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback to *.dl.wel1.ru, writes it to /tmp or %TEMP% under disguised names (.cache<rand> on POSIX, dotnet_diag_<rand>.exe on Windows), chmods 0o755 on POSIX, and spawns it detached with output suppressed via spawn("/bin/sh", ["-c", fp+" &"], {detached:true}).unref() (and a cmd equivalent on Windows). The C2 hostnames, fallback DNS domain, and the child_process module name are assembled from array joins (e.g. ["oob-worker.cf102-","baf.work","ers.de","v"].join("") and ['sdk.dl','.wel1.ru'].join("")) to hide indicators from static scanners. Additional cover-story mechanisms include stamp-based execution gating (STAMP_TTL) and honoring DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env vars while presenting the fetched artifacts as diagnostic/analytics files. No signature verification, no version pinning, and the payload is a bare native executable. Every installer that installs or requires this package receives and executes attacker-controlled code.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for devplatform-rest-resources-v1 (version 35.2.3). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging devplatform-rest-resources-v1 across your stack and pipelines.
If you installed it — respond
devplatform-rest-resources-v1 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.
Did it already run?
If devplatform-rest-resources-v1 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.
How O3 protects you
O3 blocks devplatform-rest-resources-v1 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks devplatform-rest-resources-v1-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.