This is considered to be the most aggressive way nowadays.
1. e2e4  1... e7e5  2. g1f3  2... g8f6 The Petroff defence, which  always had a reputation of a drawish opening, is slowly turning into a silent counter-attacking tool. Remember how Caruana won the Berlin Candidates in 2018 $2 3. f3e5  3... d7d6  4. e5f3  4... f6e4 