You can't fix your security posture until you fix your update culture.
Until it's your top salesperson who 2x'd the quarterly revenue target... I'd like to live in a world where everyone knew basic security hygiene, but we have to teach it first, not punish.
> 8.2.4 Change user > passwords/passphrases at least once > every 90 days.
The consequences range in severity based on the number of times an employee is caught over a 12 month period, or if, as part of the attack, the employee enters their credentials on the webpage linked in the email (a big no-no). They range from: a meeting with your manager to discuss, a requirement to park outside the security gate and walk in for at least 2 weeks, to your vacation accrual rate being reduced, all the way to unpaid suspension or termination with 4 failures in 12 months.
Of course as part of the on-boarding process the company provides pretty extensive training on how to spot a phishing attempt but some attacks can still get a large portion of our company.
The downside is now some employees who have been burned before are terrified of opening any external emails. This ironically resulted in an exceptionally low participation rate in our company's annual employee engagement survey conducted by, you guessed it, an external party.
I think they have other mitigation strategies. Like probably quietly installing extra scanners on the email of the most "problematic" people who open anything and forward chain letters constantly.
At some point you really do need to give up on your fancy canaries, gateway and host IDS, perimeter blinky boxes, threat intelligence feeds, endpoint protection products, etc, and just start firing those in your employ who willfully and joyously thumb their noses at basic security hygiene.