Source: VK Wotleaks community

From left to right:

“Bonebreaker” – for hitting at least 5 enemy tank modules or members of crew in random battle

“Supersticious” – survive victorious random battle while recieving damage from at least 4 different enemy players

“Demolition Man” – for ammoracking an enemy in random battle

From left to right:

“Shoot to Kill” – cause more damage to enemy than is the amount of hitpoints of your tank. Fire damage and ramming counts, but it is not awarded to arty

“Reliable friend in battle” – do not damage any allied tanks in 50 random battles (damage to modules, unless they get destroyed, does not count, non-penetrating hits and ricochets also don’t count, series can continue on any vehicle)

“Impenetrable” – recieve more potencial damage (damage blocked by armor) than hitpoints of your tank, only in random battles and you have to survive the battle