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  3. Trojan.Adclicker


Risk Level 1: Very Low

September 12, 2002
May 21, 2010 2:57:13 AM
Systems Affected:
Windows 2000, Windows 7, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
Trojan.Adclicker is a detection name used by Symantec to identify malicious programs that share the primary functionality of artificially generating traffic to pay-per-click Web advertising campaigns in order to create or boost revenue.

Pay-per-click, or PPC, is a Web advertising technique by way of which revenue is generated each time a user clicks on an advertisement. Advertising revenue may be shared by the parties involved in a number of different ways, but advertisers typically pay advertisement publishers each time a user clicks on one of their advertisements.

If a criminal group — or one of their affiliates — poses as a publisher, they can generate revenue by artificially generating fake 'clicks'. One way in which this may be achieved is through the use of a Trojan horse program that runs on unsuspecting users' computers. Trojan.Adclicker is a detection name used by Symantec to identify these malicious programs.

If a Symantec antivirus product displays a detection alert for this threat, it means the computer is already protected and the Symantec product will effectively remove this threat from the computer.

Antivirus Protection Dates

  • Initial Rapid Release version September 13, 2002
  • Latest Rapid Release version April 24, 2015 revision 007
  • Initial Daily Certified version September 13, 2002
  • Latest Daily Certified version April 24, 2015 revision 017
  • Initial Weekly Certified release date September 18, 2002
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low
  • Payload: Generates traffic to pay-per-click advertising schemes.


  • Distribution Level: Low
Writeup By: Henry Bell

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