The company had not previously disclosed which apps had been affected, although many had been identified by third parties.
Apple said on Sunday it was cleaning up its App Store after several cybersecurity firms reported that unknown hackers had embedded a malware, dubbed XcodeGhost, in hundreds, possibly thousands, of Chinese apps.
“We have no information to suggest that the malware has been used to do anything malicious,” Apple said in its XcodeGhost Q&A Web page on Thursday.