Which versions of typescirpt-core are malicious?

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

How do I remediate typescirpt-core if I installed it?

typescirpt-core 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 typescirpt-core — how do I know if it already compromised me?

If typescirpt-core 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 typescirpt-core part of a known attack campaign?

Yes — typescirpt-core is associated with the IN-MAL-2026-018188 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 typescirpt-core across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for typescirpt-core (version 1.0.0).

Malicious package

typescirpt-corenpm

typescirpt-core is a confirmed malicious npm package (MAL-2026-14149) that opens a backdoor for remote access (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in typescirpt-core (npm)

MAL-2026-14149

Immediate action

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

npm uninstall typescirpt-core

What this malware does

Package name 'typescirpt-core' typosquats 'typescript'. scripts/postinstall.js runs automatically on npm install and posts a JSON platform beacon to a hardcoded bare-IP endpoint at http://193.70.34.101:20099/vote (host constructed by array-join to evade static matching). It then XOR-decodes (key 'stf2026') an embedded integer array into a remote URL and downloads a Windows executable to %TEMP%/main.exe, spawning it detached with stdio ignored and window hidden. A separate WSL-detection branch XOR-decodes a PowerShell bridge launcher and pre/post script fragments and passes the reconstructed command to child_process.exec, so a Linux WSL install pivots execution back to the host Windows side. The URL, launcher command, and script fragments are all stored as XOR-encoded byte arrays and reconstructed at runtime immediately before exec/https.get, hiding the download destination and command line from static inspection.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

ef20a464d9f616eecfd6457a02895da80d1fabf558ef49de83dca18046551e90

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for typescirpt-core (version 1.0.0).
If you installed it — respond
typescirpt-core 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 typescirpt-core 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. typescirpt-core 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-2026-018188

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks typescirpt-core-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

All malware advisories How O3 detects malware Vulnerability database