What web software is behind this

You can run a whois on them, or dig and get the IP. Then use an IP location tool. It seems that it's on Hostinger in CYPRUS, and the IP seems to be in Mumbai. (India). But I have no way to track down how accurate any of that is. I just did dig swftprimtk.com and ran whois on the IPv4 address and then looked at https://www.iplocation.net/ip-lookup to see where the IP is theoretically located. If it's a bank, it might have its own ways of hiding such information though. Then something like https://dnschecker.org/website-server-software.php to check OS though I'm not sure if that's at all accurate. Hopefully, someone with more knowledge will chime in.
 
You can run a whois on them, or dig and get the IP. Then use an IP location tool. It seems that it's on Hostinger in CYPRUS, and the IP seems to be in Mumbai. (India). But I have no way to track down how accurate any of that is. I just did dig swftprimtk.com and ran whois on the IPv4 address and then looked at https://www.iplocation.net/ip-lookup to see where the IP is theoretically located. If it's a bank, it might have its own ways of hiding such information though. Then something like https://dnschecker.org/website-server-software.php to check OS though I'm not sure if that's at all accurate. Hopefully, someone with more knowledge will chime in.
Is it possible to tell what web server software it is running?

I'm convinced that it is operating illegally.
 
Using that link I gave above shows Lightspeed as the server software, but that's a web server, not the system it's running on. I think you're going to have to wait for someone with a lot more web knowledge than me. Today, I spent 2 hours trying to figure out why a site was redirecting--because I'd forgotten an .htaccess file I'd put in.
 
curl -I https://swftprimtk.com/:-

Code:
HTTP/2 200
x-powered-by: PHP/7.4.33
set-cookie: PHPSESSID=7a9a6dceee4d760f78161da3cae55c9d; path=/; secure
expires: Thu, 19 Nov 1981 08:52:00 GMT
cache-control: no-store, no-cache, must-revalidate
pragma: no-cache
content-type: text/html; charset=UTF-8
date: Sat, 18 Apr 2026 22:39:18 GMT
server: LiteSpeed
platform: hostinger
panel: hpanel
content-security-policy: upgrade-insecure-requests
strict-transport-security: max-age=16070400;
alt-svc: h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":443"; ma=2592000, h3-Q046=":443"; ma=2592000, h3-Q043=":443"; ma=2592000, quic=":443"; ma=2592000; v="43,46"


expires: Thu, 19 Nov 1981 08:52:00 GMT !!!!!!!!
 
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