# \[Pentesting\]\[Math\] Finding masks for Hashcat using combinatorics

DevFeed: [\[Pentesting\]\[Math\] Finding masks for Hashcat using combinatorics](<https://devfeed.tech/articles/pentesting-math-finding-masks-for-hashcat-using-combinatorics-20563.md>)

Original publisher: [Read original article](<https://yurichev.com/blog/hashcat_masks/>)

Published: 2025-12-14T23:00:00Z

Content type: tutorial

Language: en

Sources: [Dennis Yurichev](<https://devfeed.tech/sources/dennis-yurichev.md>)

Topics: [math](<https://devfeed.tech/topics/math.md>), [passwords](<https://devfeed.tech/topics/passwords.md>)

Tags: [commands](<https://devfeed.tech/tags/commands.md>), [math](<https://devfeed.tech/tags/math.md>), [passwords](<https://devfeed.tech/tags/passwords.md>)

## AI overview

This article uses combinatorics to analyze common password masks in rockyou password lists. It presents masks and Hashcat commands, including those estimated to run in under one month on an RTX 4000 Ada in WPA2 cracking mode.

## Source excerpt

[Pentesting][Math] Finding masks for Hashcat using combinatorics