A hacking gang known as the Lazarus Group might be responsible for a string of attacks that have targeted Polish banks and other financial organizations. The group is known for preying upon institutions in the U.S. and South Korea especially. Some evidence even links Lazarus to the Bangladesh Bank heist that occurred back in 2016. Researchers at BAE Systems found that one of the samples used in the attacks appears to belong to the threat actors toolkit. The attackers appear to be using a customized exploit kit, which is preconfigured to only infect visitors from approximately 150 different IP addresses.”]
Source: https://grahamcluley.com/lazarus-gang-possibly-behind-malware-attacks-polish-banks/