Travelex is currently only able to serve customers face-to-face at its 1,200 on-airport and off-airport locations worldwide.
Travelex is yet to ascertain what all data has been encrypted by the ransomware.
Ransomware attacks, which encrypt and hold a user's files hostage in exchange for payment, comprise one of the fastest growing forms of cyber attack.
Sleuths detected a number of high net worth individuals (HNIs) and customer IDs in these databases and prima facie about 20-25 lakh such entities have been traced.
The report, examined potential economic losses from the hypothetical hacking of a cloud service provider and cyber attacks on computer operating systems.
Malware attack: Ransomware hits operations at JNPT terminal, Gujarat port; APM terminals hacked globally
The JNPT port, which consists of three terminals, has a capacity to handle 4.5 million standard container units, and GTI Terminal has a 1.8 million TEU capacity.
Operations at one of the container terminals at Mumbai's Jawaharlal Nehru Port Trust (JNPT) port was impacted due to the ransomware attack.
The number of computers reported infected by a global ransomware attack in India has more than doubled to around 193 on Thursday from a day ago.
According to a report in Financial Times on Thursday, issuing a free custom support would have protected the computers from the ransomware attack.
The global ransomware attack has affected several computers of a state power distribution company in West Bengal. Central govt. computers unaffected.
120 computers of the Gujarat State Wide Area Network (GSWAN) were infected by the WannaCry virus, but no valuable data was lost
The cyber attack, which shut car factories, hospitals, shops and schools over the weekend, has proved less severe than anticipated in Asia, but industry professionals have flagged potential risks in the future.
The cyber criminals have demanded a fee of about $300 in crypto-currencies like Bitcoin for unlocking the device.