GCVE-110-OSM-2026-1175

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published March 25, 2026

Downloads and executes a stage-2 payload from isillegion.com/api/ip-check-encrypted/3aeb34a37 via a detached background process spawned on postinstall, using Function.constructor for arbitrary code execution. Identical attack payload to chai-as-hooked@1.0.0 from the same attacker. Identical to chai-as-hooked: postinstall runs index.js which spawns detached lib/initializeCaller.js. It decodes the C2 URL from base64 and POSTs to it via axios, then executes the response via new Function.constructor('require', response)(require). Same author (hello@jsonspack.com), same C2 endpoint.

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

High · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	chai-as-redeployed	3.5.7 (affected)	—

References

Malicious npm package: chai-as-redeployed

advisory

vendor

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