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Russian hackers plant nuclear weapon prompt in malware to trip AI safety guardrails

ID: d8f8ac0d-4ceb-5fc5-81d5-25f84aa71d14

STIX ID: report--d8f8ac0d-4ceb-5fc5-81d5-25f84aa71d14

Feed Name: Help Net Security

Threat Score
80/100

Date Published: 2026-08-31

Date Updated: 2026-08-31

Author: Sinisa Markovic

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ESET discovered that Russia-aligned UAC-0099 embedded a manipulative prompt (GuardBreaker) in a VBS script used to deliver MATCHBOIL, deliberately triggering AI safety mechanisms to interrupt automated analysis; CERT-UA has documented the broader infection chain (LUNCHPOKE, BURNYBEAR, MATCHBOIL.V2). The finding illustrates a nation-state actor adapting to AI-assisted security workflows and highlights the need for multilayered detection and human-driven analysis.

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