1. Qatar National bank data breach
Attackers hacked into QNB's bank systems, and stole gigabytes of data. This affected most many QNB clients. The bank managed to minimize its losses. It however couldn't find the ones responsible.
https://www.cyberlands.io/topsecuritybreachesqatar
https://www.bankinfosecurity.com/qatar-national-bank-suffers-massive-breach-a-9068
https://www.reuters.com/article/us-qatar-ntl-bank-idUSKCN0XO22S
2. Ras Gas Virus attack
Ras Gas suffered a virus attack that shut down their office computers and IT processes for days. The attack was investigated to be supposedly a virus from Iran which targeted large energy companies.
https://www.cyberlands.io/topsecuritybreachesqatar
https://www.wired.com/2012/08/hack-attack-strikes-rasgas/
https://www.itp.net/security/590257-cyber-attack-takes-qatars-rasgas-offline