Researchers at Arbor Networks have discovered a new family of trojans designed to launch distributed denial of service (DDooS) attacks. Dubbed YoyoDDoS by Arbor Networks researchers, the trojans install a backdoor that causes infected systems to be joined to the YoyoDDoS botnet. Upon infection, the backdoor establishes a connection to the command and control server, using a hard-coded host name and port.
According to Jeff Edwards of Arbor Networks, once the bot has received the command to attack, "the bot immediately attempts to set up two TCP connections to the victim IP address on a port that appears to be random (e.g., 21701). As soon as these initial two SYN packets are sent off to the victim, the bot begins flooding the victim with UDP packets to the same port number."
Successful attacks overwhelm the victim system with traffic, causing it to be unable to process or respond to legitimate traffic. For the full analysis, see Arbor Networks' "YoyoDDos: A new family of DDos bots".
antivirus review
Another problem that seems to come up from time to time is when some people try and delete files that relate to Trend Micro Security/Antivirus manually. They delete the files that show up as errors from time to time, but what they don’t realise is that they could be doing a lot of harm to their computer software if they accidently delete the wrong file or files. What usually happens is the next time when they turn on their computer, all sorts of problems come up like screen freeze, pop up error boxes or their computer simply won’t function at all.