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Trojan:JS/Agent.FA is malicious JavaScript trojan embedded in a Web page. The JavaScript is designed to circumvent popup blocking by security applications.

It is also known as:

  • VBS/IstBar (AhnLab)
  • JS/ForcePopup (Authentium (Command))
  • Trojan.Clicker.CM (BitDefender)

Symptoms

The presence of one or more popup windows that bypass installed popup blockers may be indicative of a Web page hosting Trojan:JS/Agent.FA.