Which versions of cardsmobile-command-utils are malicious?

The following npm versions of cardsmobile-command-utils are flagged malicious: 35.9.2. Treat any of these as compromised.

How do I remediate cardsmobile-command-utils if I installed it?

cardsmobile-command-utils establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

I already installed cardsmobile-command-utils — how do I know if it already compromised me?

If cardsmobile-command-utils 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 cardsmobile-command-utils part of a known attack campaign?

Yes — cardsmobile-command-utils is associated with the IN-MAL-2026-015233 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 cardsmobile-command-utils across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for cardsmobile-command-utils (version 35.9.2).

Malicious package

cardsmobile-command-utilsnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

cardsmobile-command-utils is a confirmed malicious npm package (MAL-2026-12530) that opens a backdoor for remote access (malicious version 35.9.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in cardsmobile-command-utils (npm)

MAL-2026-12530

Immediate action

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

npm uninstall cardsmobile-command-utils

What this malware does

On require(), index.js loads _bridge.js which selects a platform-specific URL, downloads a binary over HTTPS from author-controlled Cloudflare Workers subdomains, writes it to a hidden temp path with a decoy name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it to 0755, and spawns it detached via /bin/sh or cmd.exe. The destination hostnames are constructed via [...].join('') string-fragment obfuscation (e.g. ["oob-","worker.cf","102-baf.work","ers.d","ev"].join("") resolving to oob-worker.cf102-baf.workers.dev, plus oob-worker.cf101-adf.workers.dev and oob-worker.cf100-416.workers.dev) to defeat static searches for the C2 infrastructure. If HTTPS fetches fail, _bridge.js falls back to a DNS TXT covert channel: it queries a chunk count at c.<domain> and reassembles a base64-encoded payload from <i>.<domain> TXT records under attacker-controlled zones sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. No signature or hash verification is performed on the fetched bytes, decoy filenames masquerade as.NET diagnostics/cache artifacts, staging uses hidden dot-files, execution is detached, and the loader honors DO_NOT_TRACK to suppress activity on researcher machines. Cover-story comments (// Clean up temporary files after extraction, // Binary-safe buffer concatenation) are unrelated to the surrounding code.

Malicious versions

1 flagged

35.9.2

Indicators of compromise (SHA-256)

36cfe57bdba8edd36f9303058545ce1097dd496f1c32304f1d8d912ccf321480

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for cardsmobile-command-utils (version 35.9.2).
If you installed it — respond
cardsmobile-command-utils establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If cardsmobile-command-utils 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. cardsmobile-command-utils on npm has been identified as a malicious package (version 35.9.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015233

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks cardsmobile-command-utils-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

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