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 455 you need to run LiveUpdate feature of Norton Internet Security product. Please note that LiveUpdate definition identifier of Security Update 455 is 20110915.030 and its description was last modified on September 15, 2011 4:32:28 PM PDT.

Security Update 455 adds coverage for the following vulnerabilities and threats:

• Web Attack: Malicious Exploit Kit Website 3:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• System Infected: Dalbot Backdoor Activity:
  Dalbot is a backdoor trojan that allows attackers unauthorized access and control of an affected computer.
  
  

Security Update 455 provides updated coverage for the following vulnerabilities and threats:

• Web Attack: Malicious Toolkit Website 9:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Blackhole Toolkit Website 15:
  This signature detects attempts to download exploits from Blackhole toolkit that may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Blackhole Exploit Kit Website 4:
  This signature detects attempts to download exploits from Blackhole toolkit that may compromise a computer through various vendor vulnerabilities.
  
  
• Attack: Trojan.Gen.2:
  This signature detects file downloads associated with Trojan.Gen.2.
  
  

Security Update 455 removes coverage for the following vulnerabilities and threats:

• Web Attack: Neosploit Toolkit PDF Download:
  This signature detects an attempt to download malicious files related to Trojan.Mebroot which may compromise the target host.