Many addresses and cellphone contact numbers of the politicians were leaked, but other documents included bank and financial details, identification cards and private chats.
'With regard to the chancellery it seems that, judging by the initial review, no sensitive information and data have been published and this includes (from) the chancellor, ' the spokeswoman told a regular government news conference on Friday.
"The German government takes this incident very seriously", she said Friday, adding that the country's cyber-defencecentre was investigating the breach.
Fallout from the attack has also prompted some finger-pointing in Germany, with security experts accusing politicians of using lax password and privacy practices - and politicians asking why federal authorities seemingly weren't aware of the data leak until a famous YouTuber went public.
"According to what we know so far the government's confidential networks were unaffected". Spokespeople for the German government said that government computer systems had not been penetrated. A Twitter account that was used to promote the data used the name "G0d", described itself as a security researcher, and claimed to be based in Hamburg. "It will be important for media organizations covering the leaks to think carefully about how to cover the story without serving as a megaphone to spread the leaked information-likely one of the attacker's goals", Rosenberger added. The data was leaked in an "Advent-calendar style" which started as "doors" focused on TV personalities, followed by entertainers and lastly politicians.
The hack, which was discovered this week, is the largest ever reported in Germany, but where the data originally comes from or why it was stolen and made public, is now unclear.
An interior ministry spokesman refused to confirm or deny whether the documents had been published following an external hacking attack on the German parliament or an internal leak.
According to a spokesperson for the country's defensive cyber security agency, the BSI, Germany's domestic and foreign intelligence agencies have met to co-ordinate their response. It said the identity of the perpetrators and their motive were not known.
By midday Friday, Twitter had suspended the account.
The domestic intelligence service, the Office for the Protection of the Constitution, reported repeated cyberattacks previous year against MPs, the military and several embassies allegedly carried out by Russian cyber espionage group "Snake".