OpenSSF/OSV advisory MAL-2026-14149 confirms this npm version as malicious. 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...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in typescirpt-core (npm)
Details
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.
Decision reason
OpenSSF Malicious Packages via OSV confirms typescirpt-core@1.0.0 as malicious (MAL-2026-14149): Malicious code in typescirpt-core (npm)