Until the new measures are implemented in the next three months, new CFD trading by individual investors will be restricted.
Crypto holdings will be included under the private interests that members of the National Assembly need to report.
Regulators are extending support measures, encouraging write-offs of loss-making assets, and reassessing risk weights.
One of the entities jointly sanctioned by the US and South Korea employs "thousands" of North Korean IT workers that operate in Russia, China and Laos.
The guidelines, created by three ESG evaluation agencies and endorsed by regulators, take effect from 1 September.
The FSC said there was a need to enhance banks' loss absorption capacity to prepare for macroeconomic uncertainties and increased risks in the financial sector.
Korean officials will seek tougher sanctions and penalties as well as regulatory improvements to the current CFD trading system.
The taskforce was established to lay the groundwork for promoting "data-driven innovation" in the financial industry.
FSC chairman Kim Joo-hyun asked FIs to actively invest in and use AI to strengthen the global competitiveness of Korea's financial industry.
The FSC said it has confirmed that a "significant number" of CFD accounts were involved in last month's stock crash.
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