...
In case of the 06-17 attack, this would freeze all ether in The DAO. Basically, because the attackers were continuing draining ethers from the DAO community, an independent group of the ‘good guys,’ so-called Robin Hoods, made a counter-attack and hold over 7 million Ether on DAO's own child DAO, waiting to be rescued. The attacker, as well as anybody else, would not be able to withdraw any funds from any DAO.
...