<p>More money nowadays moves online and it is very understandable that criminals want to make more money online aswell, because these days’ banks don’t have large sums of money in their cash box. Since there are many other internalrisks involved in robbing a bank, criminals have found many other ways to commit crimes and much lower risMore money nowadays moves online and it is very understandable that criminals want to make more money online as well, because these days’ banks don’t have large sums of money in their cash box. Since there are many other internal risks involved in robbing a bank, criminals have found many other ways to commit crimes and much lower risk in online crime. The first level of change involved was email-based phishing, but later circumstances changed again.</p><p>Authentication methods and security of online bank has been improved over the period. This will drastically reduce effects of phishing based on emails and fraudulent website. The next level of online bank fraud is called banking Trojans. These Trojans infect the online customers of banks. These Trojans monitors customer’s activities and uses their authenticated session to steal customers’ money.</p><p>A lot of money is made by these kinds of attacks. Comparatively few perpetrators have been caught, and the problem is getting worse day by day. To have a better understanding of this problem, I have selected a recent malware sample named as SilentBanker. It had the capability of attacking more than 400 banks. This thesis presents the problem in general and includes my results in studying the behaviour of the SilentBanker Trojan.</p>

More money nowadays moves online and it is very understandable that criminals want to make more money online aswell, because these days’ banks don’t have large sums of money in their cash box. Since there are many other internalrisks involved in robbing a bank, criminals have found many other ways to commit crimes and much lower risMore money nowadays moves online and it is very understandable that criminals want to make more money online as well, because these days’ banks don’t have large sums of money in their cash box. Since there are many other internal risks involved in robbing a bank, criminals have found many other ways to commit crimes and much lower risk in online crime. The first level of change involved was email-based phishing, but later circumstances changed again. Authentication methods and security of online bank has been improved over the period. This will drastically reduce effects of phishing based on emails and fraudulent website. The next level of online bank fraud is called banking Trojans. These Trojans infect the online customers of banks. These Trojans monitors customer’s activities and uses their authenticated session to steal customers’ money. A lot of money is made by these kinds of attacks. Comparatively few perpetrators have been caught, and the problem is getting worse day by day. To have a better understanding of this problem, I have selected a recent malware sample named as SilentBanker. It had the capability of attacking more than 400 banks. This thesis presents the problem in general and includes my results in studying the behaviour of the SilentBanker Trojan.