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Nation-stateNov 12, 2026

Romania says it stopped Russian cyberattack targeting government emails

Romania stopped a Russian cyberespionage campaign targeting government emails.

Romania's intelligence agency (SRI) detected and stopped a cyberespionage campaign by Russian state-linked hackers, attributed to the Turla group, in December 2025. The campaign targeted a government institution, aiming to intercept emails exchanged with NATO and EU institutions by exploiting vulnerabilities in Microsoft systems. Slovak cybersecurity firm ESET identified a new malware, dubbed Cereal, used in the attack, which allowed secret monitoring of email traffic and maintaining access to compromised Microsoft Exchange servers.

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The lesson from this incident

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The Turla group, a Russian state-linked threat actor, exploited unpatched vulnerabilities in Microsoft Exchange servers used by a Romanian government institution to intercept sensitive email communications with NATO and EU partners. The attackers deployed a novel malware strain called Cereal, enabling covert, persistent access to email traffic without initially triggering detection. This incident underscores that internet-facing email infrastructure handling classified or sensitive diplomatic communications is a high-value target that demands prioritized and timely patch management. Delays in applying security updates to critical systems — especially those bridging government and allied networks — can have serious geopolitical consequences.

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Indicators of Compromise

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  • malware — Cereal

Entities

Turla (threat_actor)Secret Blizzard (threat_actor)Venomous Bear (threat_actor)Microsoft (vendor)Microsoft Exchange (product)