Dear Members of Koç University,

The ransomware “WannaCry” affected hundreds of thousands of computers in 150 countries since last Friday. The ransomware attacks corporate networks more intensively using “phishing” e-mail messages and the vulnerabilities in Windows operating system.

Please read the warning below, in order to avoid the ransomware, which spreads through e-mails.

Sample e-Mail: Ransomware Screen:


Security Risks:

·The e-mail contains a Word, Excel, PDF file or a link to make the user download the ransomware.

·The ransomware which steals into the corporate network through e-mail, spreads between other computers using a vulnerability in Windows operating system.

·When executed, the ransomware encrypts all of your personal files on your computer and demands a ransom to decrypt them back. The payment does not guarantee that your files will be back. Instead, you may fall into a blackmailing trap. Security experts does not recommend to make the payment.

·The ransomware also encrypts your shared files on network.


What To Do #1: Windows Security Updates

Please install the appropriate Windows security update, which matches your operating system version, following the related link below. You can contact IT Service Desk for support (1111 /

Windows 7 32 bit:

Windows 7 64 bit:

Windows 8.1 32 bit:

Windows 8.1 64 bit:

Windows 10 Version 1511 32 bit:

Windows 10 Version 1511 64 bit:

Windows 10 Version 1607 (Annual Update 2016) 32 bit:

Windows 10 Version 1607 (Annual Update 2016) 64 bit:


Always keep your automatic Windows updates enabled.


What To Do #2: Antivirus Software


Please make sure your antivirus software is active and up-to-date.


IT Directorate provides McAfee antivirus software on corporate computers. You can check if the software is active and up-to-date by the icon on the bottom right corner. You can contact IT Service Desk for support (1111 /

You can use Windows Defender or another trusted antivirus program on your personal computer.


What To Do #3: Other


·Do not open any suspicious e-mail messages.

·Be careful with your personal e-mail addresses as well as KU e-mails.

·You are more likely to encounter a malware when accessing the Internet outside of KU network.

·Report all suspicious e-mails to IT Service Desk ( / 1111).


Best Regards,

Information Technology


For questions and help:



Phone: 1111 or +90-212-338 1111

Service Desk Location:Student Center -1. Floor, Next to Post Office