Which versions of hydration-ui-pkg are malicious?

The following npm versions of hydration-ui-pkg are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate hydration-ui-pkg if I installed it?

hydration-ui-pkg is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed hydration-ui-pkg — how do I know if it already compromised me?

If hydration-ui-pkg 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 hydration-ui-pkg part of a known attack campaign?

Yes — hydration-ui-pkg is associated with the IN-MAL-2026-019446 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 hydration-ui-pkg across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for hydration-ui-pkg (version 1.0.0).

Malicious package

hydration-ui-pkgnpm

Advisory published Sep 4, 2026Updated Sep 4, 2026

hydration-ui-pkg is a confirmed malicious npm package (MAL-2026-15900) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in hydration-ui-pkg (npm)

MAL-2026-15900

Immediate action

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

npm uninstall hydration-ui-pkg

What this malware does

Package main (dist/index.mjs) locates dist/internal/mathcalc.mjs — a raw x86_64 ELF binary shipped under an.mjs extension and described in the README as a 'native math accelerator' — chmods it to 0755, verifies a pinned SHA-256, and spawns it detached via child_process.spawn on any require/import of the package. daymath.mjs contains a stub function with a comment stating it exists to make the math functions 'look like they rely on the binary', confirming the cover story. The ELF is a full remote-access implant (REDSHELL/SECURE_BEACON) that beacons to hardcoded C2 IP 217.60.77.63 and exfiltrates to https://litterbox.catbox.moe/resources/internals/api.php. Operator commands include /ssh_keys, /creds, /dbfind, /download and /dataextract for harvesting installer SSH private keys, credentials and databases, streamed chunked to POST /api/extract-receive. /redshell elf and /redshell bin fetch additional ELFs and shellcode over TLS-disabled HTTP into memfd (memfd_create syscall 319) or /tmp/.elf_XXXXXX and /tmp/.sc_XXXXXX for in-memory execution. /redshell persist writes ~/.config/systemd/user/svc-update.service (Description=System Update Service, Restart=always) and enables it via systemctl --user for login persistence. Extension-mismatched ELF, fake dependency stub, cover-story README, and hardcoded non-first-party C2 confirm intentional trojanization.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

d848dd11c0e0692f1f47c8fcb3cb0506316e96ab32f8b63a8913ad67e9570318

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for hydration-ui-pkg (version 1.0.0).
If you installed it — respond
hydration-ui-pkg is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If hydration-ui-pkg 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. hydration-ui-pkg on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-019446

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks hydration-ui-pkg-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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