1. South Korea Cyber-Attacked

2. Facts  When: March 20, 2013  Three major banks Shinhan Bank NongHyup Bank Jeju Bank  Two largest broadcasters Korean Broadcasting System MBC

3. Attack on Banks  All three banks reported that their internet servers were down and all ATM services were consequently down  Operations were paralyzed due to computer virus infection and erased files.  Banks stated that they were down for approximately two hours.  They also reported that no customer data or information was lost or corrupted.

4. Attack on Brodcasters  Both KBS and MBC reported that their computers had been frozen  KBS website was down  They were both able to maintain normal broadcasting despite this

5. What Caused It?  Malware known as “DarkSeoul” Identified about a year ago Targeted to attack South Korea’s most popular anti-virus products ○ AhnLab and Hauri AV  “Denial of service” attack? Flooding servers with data causing them to crash

6. Denial Of Service Attack  An attempt to make a network resource unavailable to its users.  Main purpose to temporarily or indefinitely interrupt or suspend a service of a host connected to the internet.  Saturating target with too many requests to make traffic blocks.

7. Who are the attackers?  Not yet Identified  The attacks were relatively unsophisticated Required little expertise or infrastructure  Speculation: China North Korea

8. Summary  Source of attacks have not yet been identified  Identification may take months and may not yield a definite answer  South Korea military has raised its cyber-security levels and has advised all South Korean government agencies and businesses to increase cyber-attack defenses

9. References  http://www.nytimes.com/2013/03/21/worl d/asia/south-korea-computer-network- crashes.html?pagewanted=all&_r=0 http://www.nytimes.com/2013/03/21/worl d/asia/south-korea-computer-network- crashes.html?pagewanted=all&_r=0  http://www.news.com.au/technology/n- korea-behind-s-korea-computer- crash/story-e6frfro0-1226602048092 http://www.news.com.au/technology/n- korea-behind-s-korea-computer- crash/story-e6frfro0-1226602048092  http://www.cnn.com/2013/03/22/world/as ia/south-korea-computer- outage/index.html http://www.cnn.com/2013/03/22/world/as ia/south-korea-computer- outage/index.html