Final answer:
The hacker group likely infiltrated the global financial institution's systems primarily for financial theft. They may use the stolen credit card information to make fraudulent transactions or sell it on the dark web, resulting in significant financial and trust losses.
Step-by-step explanation:
The most likely motivation of a hacker group that infiltrated a global financial institution's systems and stole credit card information is financial theft. Hackers employ a range of strategies to infiltrate systems, which can result in identity theft and significant financial damages both for individuals whose information was compromised and the institutions themselves. They often sell the stolen data on the dark web or use it to make fraudulent transactions. Such breaches shake the trust people have in institutions and pose substantial challenges to online privacy and security.
Hacking can also serve purposes beyond financial gain, such as obtaining secret intelligence for national security purposes, causing disruption to communication networks, or even influencing elections. However, in the context of stealing credit card information, the aim is more likely financial gain.