x
48h OFFER
If you're already a customer of
our homeusers protection,
renew now with a 50% off
RENEW NOW
x
SPECIAL OFFER
If you're already a customer of
our homeusers protection,
renew now with a 50% off
RENEW NOW
x
HALLOWEEN OFFER
take advantage of our
terrific discounts
BUY NOW AND GET A 50% OFF
x
CHRISTMAS OFFER
Buy the best antivirus
at the best price
BUY NOW AND GET A 40% OFF
x
SPECIAL OFFER
Buy the best antivirus
at the best price
BUY NOW AND GET A 50% OFF
x
BLACKFRIDAY OFFER
Buy the best antivirus
at the best price
TODAY ONLY UP TO 70% OFF
x
CYBERMONDAY OFFER
Buy the best antivirus
at the best price
(Only for homeusers)
TODAY ONLY UP TO 70% OFF
Active Scan. Scan your PC free
Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Agent.APB

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Agent.APB
Technical name:Bck/Agent.APB
Threat level:Low
Type:Backdoor
Effects:  

It installs a proxy server, opens a random port on the affected computer and provides its author with the information necessary to access it remotely. One of its components provides it with the ability to make downloads, so that it can update itself.

>
Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Sept. 27, 2005
Detection updated on:Sept. 29, 2005
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Agent.APB is a backdoor that installs a proxy server, and opens a random port on the affected computer.

Then, it makes GET requests of a specific format to three different websites in order to notify its authors that the computer has been compromised and supply them with the necessary information to access it remotely: number of the port opened, version of the operating system, last known IP address, etc.

Additionally, one of the components of Agent.APB provides it with the ability to make downloads, so that it can update itself.

Agent.APB does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

Visible Symptoms 

    

Agent.APB is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.