MMON (aka KAPTOXA) is a command-line tool to find credit card data and other patterns within a process memory address space.
Available command-line options:
To search the process memory, MMON uses a combination of OpenProcess, VirtualQueryEx, ReadProcessMemory.
The CC tracks are validated with the Luhn algorithm:
As seen below, MMON was able to find the dummy CC tracks within the notepad process memory: