Russia remains the biggest threat to Finnish national security, according to the Finnish Security and Intelligence Service (Supo).
The agency said on Tuesday there was no reason for Russia to change its behaviour on Finland's eastern border.
Last year, Russia began funnelling people without necessary travel documents to Finnish border checkpoints.
Speaking at an event marking the release of Supo's annual report, Teemu Turunen, the agency's acting director, said the threat on the eastern border is a long-term issue. He noted that instrumentalising migrants is an easy way for Russia to keep Finland on its toes.
According to Supo, instrumentalised migration is a means for Russia to express dissatisfaction with Finland's Nato's membership.
Supo on Tuesday also released a statement saying Russia's actions remain the greatest threat to Finland's national security.
"Russia is treating Finland as an unfriendly state, and as a target for espionage and malign influence activities," it said.
The agency said Russia has directed different types of messaging aimed at intimidating Finland. The ultimate goal of these actions is to steer Finnish decision making in a desired direction or limit the government's ability to make decisions.
The war in Ukraine, however, means Russia's focus is not on Finland, which means a military threat is not likely in the near future, according to Supo researcher Petteri Lalu.
However, the agency warned that Finland should not underestimate Russian intelligence operations.
"There are new opportunities and new means available, and they seek to exploit them. One possible method is using various criminal organisations to achieve their goals," Turunen said.
No worries over migrant spies
The agency revealed that it has been involved in screening people arriving at the eastern border.
"The possibility of using asylum seekers as spies is very limited," Turunen said, referring to reports that some of the individuals crossing the border could pose a threat to Finland's security.
He added that the majority of Russians living in Finland don't support the actions of the Russian government. Furthermore, according to Turunen, Russians living here have not organised into any kind of significant movement.
"The risk of them becoming an influential force in Finnish society is quite small," he said.
Even a total collapse of the Russian government would most likely not trigger a large influx of Russians across the Finnish border, according to Supo.
Speaking at a press event on Tuesday, Supo noted that in addition to Russia, China is also spying on Finland.
The All Points North podcast has explored Finland's changing attitude towards China.
Listen to the episode via this embedded player, on Yle Areena, via Apple, Spotify or wherever you get your podcasts.
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