Hashcat hashcat mask attack hafl md5 5100 slow speed

[penguinkeeper]

If you remove the "CCC" from the start, it should speed back up to normal. The reason for this strange behaviour is that Hashcat mostly uses the first 4 characters to parallelise from, so you may notice that CCC[mask] is drastically slower than [mask]CCC with it appended instead of prepended, this is just a flaw in Hashcat's internals that is unfortunately being hit quite hard here. You're not doing anything wrong