import re
p = re.compile(r'\b\d{1,3}(?:\.\d{3})*,\d+\b')
test_str = "|C195|1|Base de Cálculo ST: 2.608,24 - Valor da ST: 2.608.234,24 12.608.234,24\n 163,66|\nd2.608.234,24\n2.60d8.23d4,24"
print(re.findall(p, test_str))
aW1wb3J0IHJlCnAgPSByZS5jb21waWxlKHInXGJcZHsxLDN9KD86XC5cZHszfSkqLFxkK1xiJykKdGVzdF9zdHIgPSAifEMxOTV8MXxCYXNlIGRlIEPDoWxjdWxvIFNUOiAyLjYwOCwyNCAtIFZhbG9yIGRhIFNUOiAyLjYwOC4yMzQsMjQgMTIuNjA4LjIzNCwyNFxuICAxNjMsNjZ8XG5kMi42MDguMjM0LDI0XG4yLjYwZDguMjNkNCwyNCIKcHJpbnQocmUuZmluZGFsbChwLCB0ZXN0X3N0cikp
['2.608,24', '2.608.234,24', '12.608.234,24', '163,66', '608.234,24']