The foreign hackers had stolen data from Russian military firms and hacked cameras to spy on troops
A team of vigilante hackers carrying out cyber-attacks against Russia has been sent awards of gratitude by Ukraine's military.
One of the hackers called "Voltage" has been co-ordinating hacks from his home in the US. His real name is Kristopher Kortright and he is an IT worker from Michigan.
Since the start of the conflict, Ukraine has controversially been encouraging volunteer hackers to attack Russian targets.
Including the UK and the US, have official award systems for ethical hacking, this is thought to be the first time a country has awarded hackers for malicious and possibly criminal hacks.
In October, in response to the increase in vigilante hacking in Ukraine and in the Gaza conflict, the International Committee of the Red Cross warned against the use and encouragement of civilian hackers.
A member of a Polish vigilante hacking gang called Squad 303 which has also carried out attacks on Russia.
Dr Lukasz Olejnik, author of Philosophy of Cyber-security, said Ukraine's awards to foreign hackers are potentially problematic.
One Fist hacked cameras to allow Ukraine to watch Russian equipment transport.
Groups like the Anonymous collective targeted Russia with disruptive and low-level hacks that Russia largely brushed off.
Killnet's leader denies working with Russian authorities on hacks against Ukraine.