The Security Service of Ukraine (SBU) has warned of the possibility of a new cyberattack on the networks of government agencies and enterprises. The press service of the SBU announced this in a statement, Ukrainian News Agency reports. The SBU is calling for implementation of the drafted recommendations. The SBU noted that Ukraine came under a large-scale cyberattack involving the use of malicious software identified as the Petya computer virus on June 27. According to the SBU, an analysis of the consequences of and prerequisites for this attack established that it was preceded by the gathering of data on Ukrainian enterprises (e-mail addresses, passwords for accounts used by enterprises and their employees, access to command-control servers, hash-data of user accounts in affected systems, and other information that is not available in the public domain), which were then hidden in cookies and sent to a command server. As Ukrainian News Agency earlier reported, the SBU has established that Russian secret services were involved in the Petya.A virus attacks on a number of Ukrainian banks and companies on June 27.