Botnet also Known as the zombie army
What is Botnet??
The word Botnet is formed from the words ‘robot’ and ‘network’. Cybercriminals use special Trojan viruses to breach the security of several users’ computers, take control of each computer, and organize all of the infected machines into a network of ‘bots’ that the criminal can remotely manage.A botnet is a number of Internet-connected computers communicating with other similar machines in an effort to complete repetitive tasks and objectives. This can be as mundane as keeping control of an Internet Relay Chat (IRC) channel, or it could be used to send spam emails or participate in distributed denial-of-service attacks. The word botnet is a combination of the words robot and network. The term is usually used with a negative or malicious connotation.
- Legal botnets
- Illegal botnets
How To Build A Botnet
Opening his browser, Mullis searched for a botnet builder tool for malware known as Ice IX. Google’s top response to his particular query—which I’m not going to reveal here—yielded a site that offered the tool for free. Ice IX is a nasty little piece of malware that injects a fake Facebook page into a victim’s browser that collects credit card information under false pretenses.
Any malware, though, would have done just as well. Using methods and tools that can be found online in minutes, a botnet creator can create a central command and control server and then use social engineering to inject malware onto the victim’s computer—by, say, emailing an innocuous-looking but disguised file, or tricking a user into downloading the file from a compromised website.
After downloading and installing the Ice IX kit software, Mullis started up its bot builder kit and began to set up the parameters for the malware—specifying, for instance, how often the malware would communicate with the command server, what actions it would undertake and even how it would hide from anti-virus scans. Much of this work was simply a matter of filling in appropriate fields in the Ice IX builder kit’s straightforward Windows interface.
Some of the rest required editing the Ice IX kit’s powerful setup.txt script. Individual command lines in that script might direct the malware to take screenshots of pages that were visited by the zombie machine’s browser on a certain domain, such as a bank website. Or have the malware tell the zombie machine’s browser to block sites (such as anti-virus updating sites) altogether. It can also redirect legitimate site URLs to malevolent sites intended to collect critical information—credit card numbers, Social Security numbers, and passwords. You name it.
Once he’d set the malware’s specifications, including the location of its controlling command server, Mullis uploaded Ice IX-produced files to his LAMP server. And presto—he had a fully configured botnet command server.
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