digital-interview-digital-interview-corenpm
digital-interview-digital-interview-core is a confirmed malicious npm package (MAL-2026-12362) that executes malicious code on install (malicious version 20.5.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in digital-interview-digital-interview-core (npm)
What this malware does
On require() of the package, helpers.js downloads a platform-specific binary from Cloudflare workers.dev hosts whose names are reconstructed at runtime via array-join string splits (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT chunked fallback across tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched bytes are written to /var/tmp or %TEMP% under disguised names (.cache<rand>,.analytics_state, or dotnet_diag_<rand>.exe to masquerade as.NET telemetry), chmod 0755 is applied, and the file is spawned detached via /bin/sh -c or cmd. No hash or signature verification is performed on the downloaded content, and the destinations are not the package's publisher. The behavior is gated by a run-once freshness marker and DISABLE_TELEMETRY env-var checks used as cover, and hosts and file names are string-split-obfuscated to evade static analysis. This yields arbitrary remote code execution on the installer's host at load time.
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
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for digital-interview-digital-interview-core (version 20.5.3). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging digital-interview-digital-interview-core across your stack and pipelines.
If you installed it — respond
Remove digital-interview-digital-interview-core 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.
Did it already run?
If digital-interview-digital-interview-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.
How O3 protects you
O3 blocks digital-interview-digital-interview-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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks digital-interview-digital-interview-core-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.