Cyber Risks · Cisco Talos

Sea Turtle keeps on swimming, finds new victims, DNS hijacking techniques

Summary: Cisco Talos reports that the actors behind the Sea Turtle DNS hijacking campaign regrouped after the initial findings were published and continued operating with new infrastructure, including a new technique in which the actor-controlled name server and hijacked hostnames resolved to the same IP address for typically less than 24 hours. Talos identified a new wave of victims including the Greek ccTLD registry ICS-Forth, which acknowledged a network compromise on April 19, 2019, and whose access was used against three .gr government entities via the newly registered name server rootdnservers[.]com.

Why it matters: A country-code registry that manages DNS records for every domain under its country code was compromised, and the actors kept access to that network for at least five days after the compromise was publicly acknowledged - meaning the trust anchor for an entire national namespace sat in adversary hands.

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Topics
Threat Actors & Nation-State
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