LWA-2026-5193 confirmed malware

streamvault@1.0.1

Malicious code in streamvault (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1071.001 · Web ProtocolsT1105 · Ingress Tool Transfer

Analysis

streamvault@1.0.1 is a trojan logging library that depends on byteboxlab, which contains an RCE downloader. Upon loading the module, it fetches a second-stage payload from hxxps://axioshealthcheck[.]vercel[.]app/debugCheck?id=<DEBUG_value> via HTTPS POST. The response contains a base64-encoded JavaScript payload that is decoded and executed via new Function(code)(require), giving the attacker arbitrary code execution on the installed system. The downloader retries up to 10 times within a 60-second window. The package impersonates a real developer to appear legitimate.

analyzed by
Leitwacht
first seen
Jun 14, 2026, 07:48 AM
analyzed
Jun 14, 2026, 07:49 AM

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Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.