DarkSeoul: SophosLabs identifies malware used in South Korean internet attack

SophosLabs has identified the malware used in the major internet attack that hit systems in South Korea earlier today.

Computer networks belonging to South Korean TV broadcasters and at least two major banks in the country have been disrupted by what some have suggested was a malicious internet attack originating in North Korea.

At approximately 2pm local time, computers at the Shinhan and NongHyup banks were brought down – impacting internet banking and ATMs. Similarly, systems at the KBS, MBC, and YTN television stations were reportedly crippled – although broadcasts were not interrupted.

Some media reports have said that computers failed to boot up properly, and displayed an image of three skulls alongside a message claiming that the systems had been “hacked by Whois Team”.

However, in Sophos’s testing so far we have not been able to replicate this payload.

According to a…

Read more in my article on the Naked Security website.

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Graham Cluley is a veteran of the cybersecurity industry, having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent analyst, he regularly makes media appearances and is an international public speaker on the topic of cybersecurity, hackers, and online privacy. Follow him on Twitter, Mastodon, Threads, Bluesky, or drop him an email.