"It's a challenge. Sergei and I are accepting it", Kononenko said.
The cause of the hole on the Soyuz MS-09 spacecraft, docked to the station, has not yet been established.
Two Russian cosmonauts took a spacewalk on Tuesday seeking to resolve the mystery of a small hole found in the side of a craft docked at the International Space Station.
Until Tuesday, astronauts had only been able to examine the hole from inside the spacecraft. Russian space chief Dmitry Rogozin observed that the hole could have been drilled during manufacturing - or in orbit.
The samples, data and photographs taken from the leak site will be brought back to Earth and analyzed by Russian specialists.
The statement comes after Russian cosmonaut Oleg Kononenko removed part of micrometeorite protection of the Soyuz MS-09 spacecraft's hull and discovered a hole under it, according to reports from the Russian Mission Control Center (MCC), where the Russian cosmonauts' spacewalk is broadcast.
What makes it especially hard is that the Soyuz spacecraft, unlike the ISS, was not created to be repaired in spacewalks and has no outside railings for astronauts to hold onto.More news: Kanye: "Drake called trying to threaten me"
The Russian space agency is reportedly still in the midst of its investigation into the hole and its origins. Of course, NASA doesn't really have much choice in this regard, considering Russian Federation is now the space agency's only crewed launch partner until SpaceX and Boeing get their acts together.
Russian cosmonauts Oleg Kononenko (in the spacesuit with red stripes) and Sergey Prokopyev (with blue stripes), both Expedition 57 flight engineers, cut into the exterior insulation of the Soyuz MS-09 spacecraft during a December 11.
The Soyuz spacecraft is used to ferry astronauts to and from the ISS.
If the hole was indeed sabotage, it's unclear where it would have been done while the module was in space or while it was being constructed back planetside.
Rogozin called the spacewalk "unprecedented in its complexity" on Twitter and Roscosmos said it would "enter the history of space exploration".
Remaining aboard the 250-mile-high (400-kilometer-high) outpost for the next six months will be an American, Russian and Canadian who arrived last week.
The pair then returned back inside the space station after determining that they wouldn't need to cover their handywork with a thermal blanket.