npm · Malicious package advisory
Malware@wizloft/harness-kernel
GHSA-jjpx-9cx9-ww85
Malicious code in @wizloft/harness-kernel (npm)
Details
**Severity:** Critical
**Affected versions:** `= 0.1.1-alpha.3`
## Source: amazon-inspector (b6d73d94752604c9b48dd785c20cee875e268bb52c673bf3817f95000830fa85)
dist/index.js contains an obfuscated top-level async IIFE that executes on import. It queries Ethereum JSON-RPC endpoints (eth.drpc.org, eth.publicnode.com, ethereum-rpc.publicnode.com, and an Etherscan-like API) for the most recent transaction from a hardcoded marker address (0xa322E5f39aDC2490Ef6f0121063e358050D311D3080e), parses the transaction's `to` field into two IPv4 addresses, HTTP-fetches XOR-encrypted payloads from `http://<ip>/0x/ls` and `http://<ip>:443/0x/cl`, XOR-decrypts them, then executes the resulting JavaScript via `eval(...)` and a detached `spawn('node', ['-e', <decrypted>], {detached:true})`. The entire loader is packed with obfuscator.io-style transforms (hex `_0x` identifiers, rotating string array `_0x240a`, control-flow flattening) that conceal the network-fetch-and-exec chain behind benign-looking exports. On-chain C2 makes the exfil/RCE destination mutable and takedown-resistant; the payload contents are opaque and attacker-controlled.
---
Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/212ab477a3bdce7d9f5412f6647f735d6aecceb6/osv/malicious/npm/@wizloft/harness-kernel/MAL-2026-14287.json))
**References:**
- https://github.com/ossf/malicious-packages/blob/212ab477a3bdce7d9f5412f6647f735d6aecceb6/osv/malicious/npm/@wizloft/harness-kernel/MAL-2026-14287.json
- https://www.npmjs.com/package/@wizloft/harness-kernel/v/0.1.1-alpha.3
- https://github.com/advisories/GHSA-jjpx-9cx9-ww85Compromised versions (1)
- = 0.1.1-alpha.3
Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.