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.

Multidropper.AYC

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Multidropper.AYC
Technical name:Trj/Multidropper.AYC
Threat level:Medium
Type:Trojan
Effects:  

It drops on the affected computer the Trojan Siboco.A and the spyware called Omi. It does not spread automatically by its own means.

Affected platforms:

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

First detected on:Oct. 10, 2005
Detection updated on:Oct. 17, 2005
StatisticsNo

Brief Description 

    

Multidropper.AYC is a Trojan that drops on the affected computer the Trojan detected as Siboco.A and the spyware detected as Omi.

Siboco.A creates a list of files to download and runs several files without user's awareness. Additionally, it stops the process explorer.exe, which makes the Windows taskbar disappear.

Omi displays advertising pop-ups on screen when the user connects to the Internet and downloads to the affected computer several DLLs and executable files from a certain web page. Additionally, it is able to update itself by connecting to this website.

Multidropper.AYC 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 

    

Multidropper.AYC is easy to recognize once it has affected the computer, due to the following symptoms:

  • Many advertising pop-ups are displayed on screen when the affected user connects to the Internet.
  • The Windows taskbar disappears, as the process explorer.exe is stopped.