Cybercriminals Ditch Mass Spam For Targeted Attacks

In the complex and ever-changing landscape of online crime, cybercriminals have made a fundamental shift in strategy, abandoning traditional mass spam attacks in favour of personalised attacks with a greater financial impact on targeted organisations, according to a new security report from Cisco. Research conducted by Cisco Security Intelligence Operations shows the trend toward increased targeted attacks featuring highly customised threats containing malware that are directed at a specific user or group of users for intellectual property theft.

Key Findings - Email Attacks: This Time, It’s Personal

• Returns from mass email-based attacks declined by more than 50 percent from US$1.1 billion in June 2010 to $500 million in June 2011.

• Mass spam volumes plummeted from 300 billion daily spam messages to just 40 billion between June 2010 and June 2011.

• There is an increase in spearphishing and personalised scams and malicious attacks.

• Spearphishing attacks have increased threefold, while scams and malicious attacks have increased fourfold.

• The overall cost of targeted attacks to organisations worldwide is $1.29 billion annually.

Like almost all types of cybercrime exploits, the success of targeted attacks relies on technical holes and the all-too-human tendency to misplace trust. Targeted attacks are the most elusive threat to protect against and have the potential to deliver the most potent negative impact. Very low in volume, they focus on a specific individual or group under cover of anonymity provided by specialised botnet distribution channels. Typically, they rely on malware or APTs (Advanced Persistent Threats) to harvest desired data over a period of time. An example of a targeted attack is the infamous Stuxnet worm, which had the potential to severely disrupt industrial computing systems and could traverse non-networked systems, thus placing at risk even systems unconnected to networks or the Internet.

Spearphishing attacks, though more costly to mount and lower in volume than mass spam attacks, also pose serious consequences for today’s enterprises. Many spearphishing attacks ultimately lead to financial theft, making them both highly dangerous to victims and highly valuable to cybercriminals. Spearphishing campaigns, which are a highly customised evolution of the traditional mass attack technique of phishing, can net 10 times the profit of a mass attack.

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“Personalised and targeted attacks that focus on gaining access to more lucrative corporate bank accounts and valuable intellectual property are on the rise. Law enforcement efforts are making mass spam attacks less appealing to cybercriminals, who are thus spending more time and effort focusing on different types of spearphishing and targeted attacks,” said Nick Edwards, director of Cisco’s Security Technology Business Unit.