The hacktivist group Anonymous carried out attack on Greece Bank as the bank was reportedly indulged in financial corruption.
The group is looking to carry more attacks on Banks against financial corruption.
Due to strong DDoS attack, the banks servers remained offline for more than 6 hours.

To recall, OpIcarus was restarted by Anonymous in March 2016.
Charge your lasers and aim them at the Financial Matrix.
It has been said that humanity is not an end in itself but rather a means to an end.

But where does the power behind the throne lie?
Within the global financial system, centered within the New York stock exchange and the London Stock Exchange.
In humanity lies the restraints of pity and mercy, driven by fear.

But We are not merely human.
Anonymous is something much more for we possess neither fear nor mercy.
This time our target is the New York Stock Exchange and the London Stock Exchange.
Stand now, behind the banner of free men against the tyrannical matrix of institutions that oppose us.
Ready your weapons and aim them at the New York Stock Exchange and the London Stock Exchange.
This is the operation to end all others.
Innocent people may stand to lose something from this but the powers that be stand to lose much more.
Bring the rain brothers.
We are AnonymousWe are LegionWe do not forgiveWe do not forgetExpect Us.
https://www.youtube.com/watch?v=mf6JGltELzQ
The group also released a YouTube video which disclosed the cause behind these attacks.
It also revealed the websites which the group will target.