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Danger level 6
Type: Trojans
Common infection symptoms:
  • Installs itself without permissions
  • Connects to the internet without permission
  • Slow internet connection
  • Slow Computer


Backdoor.Firsot.A is a malicious Trojan with backdoor qualities. This Trojan was first released on 13 May 2011 and has gone on to infect thousands of PCs. Because of its surreptitious infiltration of the system and the damage this Trojan is likely to cause all major security companies have classed Backdoor.Firsot.A’s threat level as severe.

The threat will enter its victims’ PCs without their knowledge or say so, and will go on to root itself securely in the system before starting its nefarious activities. Due to its surreptitious entry into the system combined with the fact that all of Backdoor.Firsot.A’s actions is performed in the system background makes it even more difficult for the user to detect and remove Backdoor.Firsot.A from the system.

The developers behind Backdoor.Firsot.A designed the Trojan to provide remote access for its criminal developers of all infected systems. Once its developers gain complete control of the infected PC it can use the PC for any task they want to. This can range from any suspect action including conducting Denial of Service (DoS) attacks, and open a door to the system to allow for easier access of other malicious software to the system.

Backdoor.Firsot.A will also install a proxy Trojan that will spam the user and install a keylogger so that all the user’s activities is monitored and relayed to the developers of this seditious Trojan. This makes the user even more vulnerable to criminal victimization as Backdoor.Firsot.A’s developers will gain access to the user’s personal info such as usernames, passwords and credit card information. This can lead to credit card and identity fraud and cause endless hassles for the user.

In order to restore the system’s security, privacy and protection users are urged to get rid of Backdoor.Firsot.A immediately. This can easiest and safely be achieved by using a genuine and powerful security tool which will not only erase Backdoor.Firsot.A but also protect it against similar attacks in future.

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How to manually remove Backdoor.Firsot.A

Files associated with Backdoor.Firsot.A infection:


Backdoor.Firsot.A processes to kill:


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