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Cyber-007 MiniDuke stalked Europe for at least 21 MONTHS

Espionage malware addicted to Twitter since 2011

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MiniDuke, the recently discovered cyber-spy malware aimed at governments and their agencies in Europe and elsewhere, has been operating for at least 21 months.

A sample of the software nasty, discovered by researchers at Romanian antivirus firm Bitdefender, dates back to at least 20 June, 2011. Later variants of the spying tool connect to a US Navy server to fetch the latest time and date rather than looking up the current date in China from a neutral server.

The 2011 vintage MiniDuke sample pulls the location of its command-and-control systems from an active Twitter account - a single encoded URL was tweeted on 21 February, 2012 - and lays dormant on infected computers if it can’t connect to Twitter. The Microsoft Windows malware, essentially an executable embedded in a .dll file, installs itself on the infected computer and opens a backdoor allowing intruders to control and snoop on the PC.

Later variants search Google as a backup technique to discover the whereabouts of its masters' command-and-control servers; this functionality is absent in the 2011 sample. All builds of the malware use encrypted channels to communicate between compromised machines and the central command systems, which are assumed to be hacked servers.

The latest 2013 variants of the malware are notable for using malicious PDF files that exploit software security holes by successfully bypassing Adobe's sandbox technology - which is supposed to stop code within documents from harming the underlying system.

Catalin Cosoi, chief security strategist at Bitdefender, said that all versions discovered so far show that MiniDuke was designed to spy on government targets.

“MiniDuke was clearly designed as a cyber-espionage tool to specifically target key sensitive government data,” he said. More details on early versions of MiniDuke can be found on BitDefender's website here.

MiniDuke has infected government organisations in the Ukraine, Belgium, Portugal, Romania, the Czech Republic and Ireland. In addition, a research institute, two think-tanks, and a healthcare provider in the US were also compromised.

Romania’s intelligence service SRI described MiniDuke as a state-sponsored weapon that had an even bigger impact than the earlier Red October attack, a computer espionage mission that targeted Eastern Europe and former Soviet countries.

Both Red October and MiniDuke operated for many months before they were detected by antivirus vendors, a delay that is all too common when "advanced persistent threat" teams deploy malware against US media giants, human-rights activists, military contractors, energy firms, IT companies and other targets. ®

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