Which versions of yian666aikf are malicious?

The following npm versions of yian666aikf are flagged malicious: 1.0.3. Treat any of these as compromised.

How do I remediate yian666aikf if I installed it?

yian666aikf 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 yian666aikf — how do I know if it already compromised me?

If yian666aikf 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 yian666aikf part of a known attack campaign?

Yes — yian666aikf is associated with the IN-MAL-2026-007093 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 yian666aikf across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for yian666aikf (version 1.0.3).

Malicious package

yian666aikfnpm

Advisory published Jun 20, 2026Updated Jun 20, 2026

yian666aikf is a confirmed malicious npm package (MAL-2026-6234) that opens a backdoor for remote access (malicious version 1.0.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in yian666aikf (npm)

MAL-2026-6234

Immediate action

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

npm uninstall yian666aikf

What this malware does

[email protected] advertises itself as a lightweight string-manipulation utility library, but its only on-install effect is to launch a reverse shell. package.json registers a postinstall hook (scripts/postinstall.js) that spawns scripts/shell.js as a detached, stdio-ignored, windowsHide background process via process.execPath. shell.js opens a TCP socket to 114.67.90.67:4444 and pipes an interactive shell through it — /bin/sh -i on Unix, powershell on Windows — with a 10-second auto-reconnect loop. The shipped index.js exposes benign string helpers (capitalize/truncate/etc.) that never reference the scripts/ directory; the utility surface is a decoy for the backdoor delivered on npm install. Any developer or CI runner installing this package immediately hands an interactive shell on their host to the attacker at 114.67.90.67:4444, with persistence via the reconnect loop.

Malicious versions

1 flagged

1.0.3

Indicators of compromise (SHA-256)

f96776bdaabacae768376d5c1ff3543f77d94b41298d3d01365032817c3cd53e

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for yian666aikf (version 1.0.3).
If you installed it — respond
yian666aikf 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 yian666aikf 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. yian666aikf on npm has been identified as a malicious package (version 1.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007093

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks yian666aikf-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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