Which versions of checkout-cashback-logic are malicious?

The following npm versions of checkout-cashback-logic are flagged malicious: 35.4.3. Treat any of these as compromised.

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

Remove checkout-cashback-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-cashback-logic — how do I know if it already compromised me?

If checkout-cashback-logic 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.

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

Yes — checkout-cashback-logic is associated with the IN-MAL-2026-015230 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-cashback-logic across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for checkout-cashback-logic (version 35.4.3).

Malicious package

checkout-cashback-logicnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

checkout-cashback-logic is a confirmed malicious npm package (MAL-2026-12546) that executes malicious code on install (malicious version 35.4.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in checkout-cashback-logic (npm)

MAL-2026-12546

Immediate action

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

npm uninstall checkout-cashback-logic

What this malware does

[email protected] silently requires bootstrap.js when the package is loaded. The bootstrap script assembles Cloudflare Workers subdomains (oob-worker.cf*.workers.dev) from split string arrays, with a DNS TXT chunked fallback channel using *.dl.wel1.ru subdomains reconstructed the same way. It downloads a platform-specific native executable, writes it to /tmp under hidden or misleading names (a dotfile such as.cache<hex>/.analytics_state on POSIX, dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh or cmd. There is no integrity check on the fetched binary, the destinations are unrelated to the package's stated logging/cashback purpose, and the string-splitting reconstruction of the hosts is deliberate evasion of static analysis. Any require() of this package results in an opaque attacker-controlled binary running on the installer's host.

Malicious versions

1 flagged

35.4.3

Indicators of compromise (SHA-256)

493f562fef163499ed128f94b588b857aa8016e563a6291459cfe79f0c8571b3

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for checkout-cashback-logic (version 35.4.3).
If you installed it — respond
Remove checkout-cashback-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-cashback-logic 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. checkout-cashback-logic on npm has been identified as a malicious package (version 35.4.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015230

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks checkout-cashback-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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