Virus Trojans use application software vulnerabilities for Intrusion

Most Trojans may exploit system vulnerabilities, which is already familiar to everyone. As a result, security detection and removal products and management personnel focus on this aspect. However, new trends show that Trojan Horse propagation has begun to exploit a large number of common application software vulnerabilities, such as instant messaging software, which threatens the security of user systems and online transactions.

For example, the recent "Trojan agent" variant is a typical example. The biggest feature of this trojan is the use of a well-known domestic instant messaging software vulnerability for crazy propagation, hackers steal private information, such as online games and online banking account passwords. At the same time, the trojan author keeps updating the Code using this vulnerability, causing greater damage.

The trojan is frequent, not the trojan technology itself has a great change, it is very important that the trojan is no longer through the commonly used MS060-14, MS07-17 and MS07-004 system vulnerabilities such as "Trojan ", instead, they focus on application software vulnerabilities such as instant messaging. Many users often only pay attention to system vulnerability fixing. However, application software upgrades and vulnerability fixing are often less protective. In fact, this is also a widely used problem in today's network security field. In the past few years, although our software coding and testing technologies have become more mature and developers have paid more attention to security issues, the key vulnerabilities found and published have been on the rise, the major reason is that the application is becoming more and more complex and diversified at an unprecedented speed, while the methods of vulnerability attacks are also constantly being improved.

Only from the perspective of Web application attacks, in the past, these attacks mainly involved SQL injection and cross-site scripting (XSS) attacks, currently, new attack methods such as file vulnerability hiding, HTTP Response Splitting, session theft, expired page bypass access, and XML injection are constantly increasing. Therefore, although some of our common vulnerabilities, such as memory attacks, have been contained, new applications have brought new ways of attacking Trojans. our attention and attention should also be converted as soon as possible.