GCVE-110-OSM-2026-7573

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published March 20, 2026

PolinRider backdoor injection (rmcej%otb% variant) - obfuscated JavaScript payload appended to postcss.config.mjs. Shuffle-cipher deobfuscation with blockchain dead-drop C2 (TRON/Aptos/BSC). Part of confirmed DPRK Contagious Interview campaign targeting ~1,951 known victim repos. Malicious payload found in: postcss.config.mjs Signature marker: rmcej%otb% (original PolinRider variant) Shuffle seed: 2857687 | Decoder function: _$_1e42 | Secondary seed: 2667686 Behavior: Shuffle-cipher obfuscated JavaScript appended to config file. Fetches encrypted second-stage payloads from blockchain dead-drop C2 infrastructure (TRON/Aptos/BSC) and executes via eval(). Blockchain-based dead-drop makes C2 takedown virtually impossible.

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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		all (affected)	—

References

Malicious repository: https://github.com/vinod365/metal-price

advisory

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