British security officials found that a group linked to the Russian military is spying on users of compromised Small Office/Home Office (SOHO) routers in a broad cyber espionage campaign.
A Microsoft blog goes into the technical details of these attacks. The group, which researchers will refer to as APT28, but is also known under names like Fancy Bear, BlueDelta, and Forest Blizzard, changes the DNS settings of compromised routers so their traffic is sent through servers under their control, which enables APT28 to spy on users. The domain name system (DNS) is the way that internet domain names are located and translated into Internet Protocol (IP) addresses. Devices usually get network settings from routers using Dynamic Host Configuration Protocol (DHCP).
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Source: Malwarebytes labs
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