What law school did you attend? You should demand your tuition back.
Yes, the FEC Rule does encompass foreign supplied "dirt". By its very nature, negative political information does indeed possess intrinsic value.
§30121. Contributions and donations by foreign nationals
(a) Prohibition
It shall be unlawful for-
(1) a foreign national, directly or indirectly, to make-
(A) a contribution or donation of money or other thing of value, or to make an express or implied promise to make a contribution or donation, in connection with a Federal, State, or local election;
(B) a contribution or donation to a committee of a political party; or
(C) an expenditure, independent expenditure, or disbursement for an electioneering communication (within the meaning of section 30104(f)(3) of this title); or
(2) a person to solicit, accept, or receive a contribution or donation described in subparagraph (A) or (B) of paragraph (1) from a foreign national.
In addition, Trump attempted to equate/conflate (a) "opposition research" which most American election campaigns engage in, with (b) soliciting/accepting political information/data from a foreign source.
These two nodes are different and distinct; (a) is lawful while (b) is unlawful (see §30121 above).