A new variant of the TDL botnet has been discovered by security experts which has been modified to protect itself against attacks and takedown attempts by authorities.
The recent takedowns of illegal botnets has made the creators improve their botnet code to harden their software against future takedowns. With reports indicating that this hardened fourth version of the TDL-4 botnet has already infected around 4.5 million PC’s in just the last three months.
Security researches explain that the TDL botnet owners are trying very hard to make their latest botnet indestructible.
“The owners of TDL are essentially trying to create an ‘indestructible’ botnet that is protected against attacks, competitors, and anti-virus companies,”
Kaspersky Labs security researchers Sergey Golovanov and Igor Soumenkov explain why the botnet is such a concern. “The changes introduced in TDL-4 made it the “most sophisticated threat today,”
A botnet is a network of computers that have been infected by a virus created by hi-tech criminal which then allows them to gain access to the infected computers remotely and perform tasks.
Source : BBC