Security Updates give the most recent protection content for Norton Internet Security, which protect networked critical systems and remote and mobile users from unwanted network intrusions and hackers, as well as from viruses, Trojans, and worms.

To download and install the Security Update 603 you need to run LiveUpdate feature of Norton Internet Security product. Please note that LiveUpdate definition identifier of Security Update 603 is 20120501.001 and its description was last modified on May 1, 2012 3:04:07 PM PDT.

Security Update 603 adds coverage for the following vulnerabilities and threats:

• System Infected: Ransom Malware Activity 2:
  This signature detects Ransom malware activity on the infected machine.
  
  
• Web Attack: Fake Facebook Application 2:
  This signature detects Fake Facebook Applications
  
  

Security Update 603 provides updated coverage for the following vulnerabilities and threats:

• Web Attack: Blackhole Toolkit Website:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Malicious Toolkit Website 10:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Malicious Executable Download 2:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Facebook LikeJacking Attack 39:
  This signature will detect malicious web pages which are used for facebook likejacking attacks.
  
  
• Web Attack: Mass Injection Website:
  It is an attack where an iframe which points to a malicious site is injected in large number of clean websites.
  
  
• Web Attack: Malicious JAR File Download 6:
  This signature detects attempts to download malicious JAR files.
  
  
• Malicious Site: Malicious Request:
  You have attempted to visit a known malicious IP address. Visiting this web site could potentially put you at risk to becoming infected. Symantec's Network Threat Protection solution has prevented any potential infection attempts from occurring. You should not have to take any additional actions and are safe from infection. It is recommended that you do NOT visit this site.
  
  
• Web Attack: Malicious Toolkit Website 14:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Malicious Java Download 9:
  This signature detects an attempt to detect vulnerability in Java which may result in remote code execution.