She said in an e-mail that the Vienna-based organization "became aware of a major information security incident" that compromised "the confidentiality "of its IT network. She said the attack did not disrupt the organization's operations. "The OSCE was able to operate, since its computer network services were not disrupted by the attack," the spokeswoman said. According to Le Monde, a Western intelligence agency believes that the Russian hacker group APT28 was behind the attack. The same source told Le Monde that the group was also behind attacks on the US Democratic Party leadership during the US presidential campaign. The OSCE spokeswoman said her organization could not confirm the claim. "As with all these cases, it is not possible to determine with certainty the identity of the attackers," Froese said.