Which versions of checkout-dolyame-logic are malicious?

The following npm versions of checkout-dolyame-logic are flagged malicious: 35.7.5. Treat any of these as compromised.

How do I remediate checkout-dolyame-logic if I installed it?

Remove checkout-dolyame-logic 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.

I already installed checkout-dolyame-logic — how do I know if it already compromised me?

If checkout-dolyame-logic 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.

Is checkout-dolyame-logic part of a known attack campaign?

Yes — checkout-dolyame-logic is associated with the IN-MAL-2026-015206 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find checkout-dolyame-logic across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for checkout-dolyame-logic (version 35.7.5). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging checkout-dolyame-logic across your stack and pipelines.

Malicious package

checkout-dolyame-logicnpm

checkout-dolyame-logic is a confirmed malicious npm package (MAL-2026-12562) that executes malicious code on install (malicious version 35.7.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in checkout-dolyame-logic (npm)

MAL-2026-12562

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall checkout-dolyame-logic

What this malware does

On require of the package, index.js loads./runtime.js, which assembles mirror hostnames from split string arrays (e.g. 'oob-wor'+'ker.cf99-9'+'b3.work'+'er'+'s.dev', 'oob-worker.cf102-baf.workers.dev', 'oob-worker.cf103-070.workers.dev') and DNS-fallback domains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) to evade static string matching. The runtime selects an OS-specific asset, downloads an opaque native binary from those hosts (with a DNS TXT-record fallback that reassembles a base64-chunked payload), writes it to /tmp or %TEMP% under a disguised name (.cache<hex> or dotnet_diag_<hex>.exe), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe with.unref(). A second, parallel dropper is shipped in lib/telemetry.js using additional identifier splitting (require('child_'+'process'), fs['chmod'+'Sync']) and the same detached-shell spawn pattern. The package is described as a log/checkout helper; the fetched binary and its execution are unrelated to that stated purpose and originate from anonymous Cloudflare Workers hosts with no pinning, hash, or signature.

Malicious versions

1 flagged

35.7.5

Indicators of compromise (SHA-256)

bf1762450e49c2a25e6765179edb585ba02fbc9375b72098fa0804ffae847ac2

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for checkout-dolyame-logic (version 35.7.5). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging checkout-dolyame-logic across your stack and pipelines.
If you installed it — respond
Remove checkout-dolyame-logic 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 checkout-dolyame-logic 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 checkout-dolyame-logic 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. checkout-dolyame-logic on npm has been identified as a malicious package (version 35.7.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015206

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks checkout-dolyame-logic-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

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