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Malicious package

fluid-type-uinpm

fluid-type-ui is a confirmed malicious npm package (MAL-2026-11136) that opens a backdoor for remote access (malicious version 2.0.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fluid-type-ui (npm)

MAL-2026-11136
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall fluid-type-ui

What this malware does

src/index.js in [email protected] contains a hidden code block, pushed off-screen by a long run of tab characters, that runs when the module is loaded via require. The block queries Ethereum JSON-RPC endpoints (1rpc.io/eth, eth.drpc.org, eth.blockscout.com) for a transaction from the hardcoded address 0xa322e5f3d311d3080e6f0121063e9adc2490ef1a, extracts two IPv4 addresses embedded in the transaction's to field, HTTP-GETs /0x/ls from the first, XOR-decrypts the response with a 16-byte key, and passes the decoded bytes to eval with a prelude that binds global.r=require and global.m=module. The result is arbitrary attacker-controlled code execution on every require of the package, with the command-and-control destination mutable via new on-chain transactions, making takedown resistant. The package is presented as a Tailwind plugin; the EtherHiding-style loader has no relationship to that stated purpose.

Malicious versions

1 flagged
2.0.8

Indicators of compromise (SHA-256)

de176a872add830e311ef01f6432b609d41e31cbf2ec6bf2dbc473dcff5c2216

Detection & response playbook

Backdoor / remote access
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for fluid-type-ui (version 2.0.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging fluid-type-ui across your stack and pipelines.

  2. If you installed it — respond

    fluid-type-ui 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.

  3. Did it already run?

    If fluid-type-ui 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.

  4. How O3 protects you

    O3 blocks fluid-type-ui 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. fluid-type-ui on npm has been identified as a malicious package (version 2.0.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-010862

References

Credits

  • Amazon Inspector · finder

Detect & block this

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

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