The Democratic National Committee (DNC) said in a new court filing this week that it was likely targeted by Russian hackers after the November midterm elections.

The filing, made late Thursday, says DNC email accounts were the subject of a spearphishing campaign on Nov. 14. The DNC suspects that Russian hacking group Cozy Bear orchestrated the operation.

Cozy Bear is one of two groups linked to Russian intelligence alleged to have hacked the DNC in the lead-up to the 2016 election.

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"It is probable that Russian intelligence again attempted to unlawfully infiltrate DNC computers in November 2018," the DNC wrote in the filing.

The Russian government has consistently denied hacking the DNC.

A source with direct knowledge of the attempt told CNN that hackers posed as a State Department official for the attack. The spearphishing campaign included a PDF that would give hackers access to users' computer systems if opened.

So far, there appears to be no evidence that the midterm hacking campaign was successful.

The DNC filed a lawsuit last year alleging that the Russian government, the Trump campaign and WikiLeaks conspired to help President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE win the 2016 election. The suit seeks millions of dollars in damages.

The filing on Thursday was part of an amended complaint in that same lawsuit.

Updated: 9:45 p.m.