14 DAY TRIAL // Trend Micro researchers have performed a detailed analysis of Asprox, the spam botnet mainly known for spreading bogus emails apparently coming from companies such as DHL, FedEx, and the US Postal Service.
According to experts, the botnet has been responsible for a significant portion of the world’s spam since 2007 when it emerged. Despite the fact that we haven’t heard much about it over the past years, the cybercriminals behind Asprox have implemented some clever techniques to make it more effective.
For instance, a modular framework has been implemented to allow botnet operators to add new features when needed.
In addition, it distributes an information-stealing module which permits its masters to harvest email, website and FTP credentials from victims.
In order to trick users into opening attachments and click on malicious links, a variety of spam templates and languages are utilized.
When it comes to avoiding anti-spam technologies, Asprox uses compromised email accounts.
The complete technical paper, entitled “Asprox Reborn” is available here.