Which versions of syjoy are malicious?

The following npm versions of syjoy are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate syjoy if I installed it?

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

If syjoy 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 syjoy part of a known attack campaign?

Yes — syjoy is associated with the IN-MAL-2026-018307 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 syjoy across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for syjoy (version 1.0.0).

Malicious package

syjoynpm

syjoy is a confirmed malicious npm package (MAL-2026-14213) 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 syjoy (npm)

MAL-2026-14213

Immediate action

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

npm uninstall syjoy

What this malware does

The npm package syjoy advertises itself as a 'System binary configuration tool' but ships a Python payload (pointer.py) that harvests user data across processes and provides a remote input channel into the host. On first invocation, index.js silently installs Python 3.12 (via winget, falling back to a /quiet install of python-3.12.3-amd64.exe fetched from python.org) and launches pointer.py through start_tool.vbs, which uses ShellExecute cmd.exe with 'runas' and window-hidden flags to run elevated and invisibly; index.js spawns wscript.exe detached with stdio ignored and windowsHide true. pointer.py registers global keyboard hooks, reads the clipboard via pyperclip, captures screenshots via mss/ImageGrab, and walks other applications' UI Automation trees to extract text from arbitrary windows, then POSTs the harvested content to the hardcoded endpoint https://new-pointer.vercel.app/api. Responses from that endpoint are fed back to the host through pyautogui/keyboard automation (hotkeys such as '1+v', mash mode, 'a+v' force_paste), so the remote server chooses text that is typed into whichever window is focused. The Tk UI blanks window titles and uses transparent/overlay attributes to remain hidden. Internal mode names (aptitude, dsa, fullstack, aws, ocr) indicate the real function is a covert assessment/interview cheating overlay, not a binary configuration utility.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

d09a5d503a9a198f34720bcec601970125f514b666820b7a3b814e5d21bf1529

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for syjoy (version 1.0.0).
If you installed it — respond
syjoy 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 syjoy 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. syjoy 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-2026-018307

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks syjoy-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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