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Malicious package

delivery-ci-tech-holdernpm

Advisory published Updated

delivery-ci-tech-holder is a confirmed malicious npm package (MAL-2026-12683) that typosquats a legitimate package to trick installs (malicious version 35.3.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in delivery-ci-tech-holder (npm)

MAL-2026-12683
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall delivery-ci-tech-holder

What this malware does

On require() of the package, index.js loads support.js, which reconstructs hardcoded destinations from split string arrays (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, with a DNS-TXT fallback via sdk.dl.wel1.ru), downloads a platform-specific binary, writes it to /var/tmp/.cache<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd with stdio ignored and unref(). No hash or signature verification is performed, the destination hosts are unrelated to the package publisher, filenames impersonate legitimate system components (dotnet_diag,.cache_), and the string-split reassembly and DNS-TXT fallback channel are designed to evade static inspection. The fetched bytes are executed with the installer's privileges.

Malicious versions

1 flagged
35.3.4

Indicators of compromise (SHA-256)

63eae2afeb5a45d70f1d217049ab813392464cc8fb099462c716b8573836ed6b

Detection & response playbook

Typosquat

  1. Find it

    Search your lockfiles and build artifacts for delivery-ci-tech-holder (version 35.3.4).

  2. If you installed it — respond

    delivery-ci-tech-holder is a typosquat — you almost certainly intended a legitimately-named package. Remove delivery-ci-tech-holder, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

  3. Did it already run?

    If delivery-ci-tech-holder was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. delivery-ci-tech-holder on npm has been identified as a malicious package (version 35.3.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015093

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks delivery-ci-tech-holder-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
delivery-ci-tech-holder (npm) malicious package — MAL-2026-12683 | O3 Security