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Look for anomalous network traffic that may be associated with these communications. Monitor Network Traffic: RATs enable an attacker to remotely control an infected computer over the network, sending it commands and receiving the results.

Monitor applications for abnormal behavior, such as notepad.exe generating network traffic. Look for Abnormal Behavior: RATs are trojans that commonly masquerade as legitimate applications and may be composed of malicious functionality added to a real application.Deploying anti-phishing and secure browsing solutions and regularly patching systems can reduce the risk of RATs by making it more difficult for them to infect a computer in the first place. Focus on Infection Vectors: RATs, like any malware, are only a danger if they are installed and executed on a target computer.

Some methods to detect and minimize the impact of RATs include: The stealthiness of RATs can make them difficult to protect against.

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For example, a pirated video game or business application may be available for free because it has been modified to include malware. They often accomplish this by piggybacking malicious functionality on a seemingly legitimate application. RATs are designed to hide themselves on infected machines, providing secret access to an attacker.

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How to Protect Against a Remote Access Trojan

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RATs also lack the same limitations of system administration tools and may include the ability to exploit vulnerabilities and gain additional privileges on an infected system to help achieve the attacker’s goals.ĭue to the fact that an attacker has a high level of control over the infected computer and its activities, this allows them to achieve almost any objective on the infected system and to download and deploy additional functionality as needed to achieve their goals. Most RATs are designed to provide the same level of functionality as legitimate remote system administration tools, meaning that an attacker can see and do whatever they want on an infected machine. For example, exploitation of an SQL injection vulnerability may only permit them to steal data from the vulnerable database, while a successful phishing attack may result in compromised credentials or installation of malware on a compromised system.Ī RAT is dangerous because it provides an attacker with a very high level of access and control over a compromised system.

The RAT may have this functionality built-in, may be designed to download and add a keylogger module as needed, or may download and launch an independent keylogger.ĭifferent attacks require different levels of access to a target system, and the amount of access that an attacker gains determines what they can accomplish during a cyberattack.

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For example, an attacker may gain a foothold using a RAT and, after exploring the infected system using the RAT, may decide that they want to install a keylogger on the infected machine. RATs may be bundled with additional functionality or designed in a modular fashion to provide additional capabilities as needed. RATs commonly have a set of built-in commands and have methods for hiding their C2 traffic from detection. The RAT will set up a command and control (C2) channel with the attacker’s server over which commands can be sent to the RAT, and data can be sent back. They might be attached to an email, be hosted on a malicious website, or exploit a vulnerability in an unpatched machine.Ī RAT is designed to allow an attacker to remotely control a computer similar to how the Remote Desktop Protocol (RDP) and TeamViewer can be used for remote access or system administration. RATS can infect computers like any other type of malware.