Any race, whose worker can fight. Named "peon rush" - since used by orcs in Warcraft 1. It is the earliest of "worker rush" attacks, but also quite hard to execute in Warcraft 1 due to four-unit selection.
In StarCraft, nobody does a worker rush, so Zerg(-ling) Rush is considered the first Rush.
In WC3, can be done by any race except Night Elves (sparks cannot attack)
What the... She's up for Peon Rush!