According to Microsoft, the kits enabled sophisticated “adversary-in-the-middle” attacks that can bypass multifactor authentication.
These attacks have surged in recent months, with criminals increasingly using QR codes to direct victims to fake login pages.
While primarily targeting financial services firms, the phishing campaigns affected users across all sectors.
“A successful phish can have devastating real-world consequences for the victims ... including life savings, which, once stolen, can be very difficult to recover,” Microsoft said.
The Egyptian operation had been active since 2017, offering subscriptions with technical support for cybercriminals.
© Agence France-Presse