Having been in the threat marketplace for several years, botnets are still successful today as it provides a powerful cloud computing network for hackers to spread malware and spam.
Like any other malware, botnets are introduced to the computer network through email attachments, websites and USB sticks. As the user accesses these files or compromised websites, malware from the botnets begin to spread and exploit vulnerabilities on the system.
|Sumit Bansal, Director for ASEAN and Korea, Sophos|
In a recent research on global spam by SophosLabs, it was found that the global volume of spam dropped by more than half just before Christmas and continued to stay at around the same level, believed to be due to the notorious Necurs botnet going quiet.
However, an old-school type of scam was seen to have resurfaced just last month with huge success. Known as pump-and-dump, the scam inflated the stock price of Incapta, a media holding company, encouraging the public to buy into the scam, thus pumping up the stock further.