37C3 - Oh no: KUNO - Gesperrte Girocards entsperren

German developers created KUNO, a tool to unlock frozen Wirecard Girocards, initially as a proof-of-concept, later refactored for robustness, now released to the public for free use.

Key takeaways
  • KUNO is a tool for unlocking frozen Wirecard Girocards.
  • It was created by a German developer who went by the pseudonym “Hase”.
  • Hase was approached by other developers who were working on similar projects.
  • KUNO was initially designed to be a proof-of-concept.
  • The team eventually refactored the code to make it more robust.
  • The KUNO tool can be used to unlock Girocards for free.
  • The team released the tool to the public.
  • The KUNO tool can be used with other PVC cards.
  • The team doesn’t plan to continue developing KUNO.
  • The KUNO tool has been used by many developers and researchers.
  • The tool has been used for various purposes, including research and educational projects.