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China, South Korea, Taiwan most infected computers

According to the 2012 annual security report from PandaLabs, nearly a third of all computers were infected globally in 2012. There were 27 million new malware strains found, at an average of 74,000 new samples per day, of which three out of every four were caused by Trojans.
The anti-malware laboratory of Panda Security details an extremely interesting year of data theft, social networking attacks and cyber-warfare. According to the report, 31.98% of all computers scanned around the world had malware. With the addition of 2012's numbers, the total of all malware samples in its database has reached approximately 125 million, of which its researchers estimated that at least 27 million new strains of malware had been created in 2012 alone.

These figures show cyber-criminals' sheer capacity to automate the creation of new malware variants, further evidenced by the average number of new threats created and released every day increasing to 74,000.


In 2012, Trojans dominated the threat landscape more than ever before. Trojans (76.56%) caused three out of every four malware infections, which is up ten points compared to 2011. One of the reasons for this growth is the increased use of exploit kits such as Black Hole, which are capable of exploiting multiple system vulnerabilities to infect computers automatically without user intervention. Viruses came second (8%), whereas worms dropped to third place accounting for 6.44% of all infections.

Malware trends

The countries leading the list of most infections are China, South Korea and Taiwan, with 54.89, 54.15 and 42.14% of infected computers respectively. On a positive note, the proportion of infected computers around the world decreased significantly. For example, the number of infected computers in China dropped from 56% in 2011 to 54.89% in 2012, whereas in Taiwan the decrease was even larger (from 52% to 42.14%).

Countries with most malware-infected computers

The countries with the fewest infections are Sweden (20.25% of infected PCs), followed by Switzerland (20.35%), and Norway (21.03).

Countries with the fewest infections

Mobile and social networking attacks

The report offers a general view of the most important events regarding computer security in 2012. In the mobile phone industry, Android's market share continued to rise to the point that it has become the platform most frequently targeted for cyber-thieves to steal users' money and information.

Social networking sites play a vital role in the life of internet users and are extensively covered in the report. Facebook and Twitter continue to be among the most popular social media sites, and are exploited by cyber-crooks to trick users, infect their computers and steal their confidential information. LinkedIn, a tool that is increasingly becoming a key part of job searches, also suffered a massive breach that led to the theft of 6.5 million user passwords.

Ransomware also grabbed the headlines in 2012 with the 'Police Virus' infecting hundreds of thousands of computers around the world, using fear and blackmailing techniques to extort money from computer users.

Security Trends for 2013

Besides offering an overview of the most significant events in the computer security field, the 2012 report also forecasts future trends for 2013. Cyber-crime and social media attacks took the spotlight in 2012 and will continue to do so in 2013. Special care will have to be taken to protect networks against operating system and application vulnerabilities, as it has become increasingly common to see cyber-criminals and national intelligence agencies exploiting security flaws to silently compromise systems. In addition, Android users will face a growing number of attacks from cyber-crooks targeting this platform. Cyber-espionage and cyber-war will also be on the rise in a year that presents itself full of challenges in the computer security world.

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