The annual reports from the Czech Security Information Service are always worth a read.

From the version covering 2019:

In 2019, countries of proliferation concerns, such as North Korea, Syria, Iran or Pakistan, continued their covert attempts to procure internationally controlled items. The countries used less known or purpose-created companies and third countries for re-exportation and tried to disguise money transfers in order to avoid being traced back.

From the version covering 2018:

In 2018, the BIS therefore also identified many cases of such countries trying to buy in the Czech Republic engineering devices, special materials, technologies and know-how that might be of use in research and development of their own WMDs. North Korea, Syria, Iran and Pakistan pose the gravest proliferation threat.