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A total of 737 cyber incidents were registered at the websites of central and local government authorities and other institutions in Bulgaria last year, according to the National Computer Security Incidents Response Team (CERT Bulgaria).
The largest number of those incidents involved malicious code (294), followed by fraud (105), offensive content (100), attempted unauthorized intrusion (65), reaping information (26), and intrusions (10).
Ransomware had remained the most aggressive cyberattack tool for 2015, CERT Bulgaria head Vasil Grancharov said in a statement released by the government’s Executive Agency for Electronic Communication Networks and Information Systems on Thursday.
Ransomware is malware that hackers install on the victim's computer to encrypt files in the system, making them inaccessible. The malware blocks or hinders the operation of the computer, or blocks the browser.
Hackers promise to send instructions and a password to decrypt the files in return for a fee, but in most cases the loss of information is irreversible, Grancharov said.
The human factor remains the main weakness opening the way to cyberattacks in Bulgaria, followed by vulnerabilities in the software of a number of websites and web servers that allow uploading of malicious content, theft of sensitive information or break-through into the system, Grancharov added.
CERT Bulgaria helps reduce the risk of cyberattacks by scanning websites for vulnerabilities and sending recommendations to government institutions to scale back those vulnerabilities.
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