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The Internet threat alert status is currently normal. At present, no major epidemics or other serious incidents have been recorded by Kaspersky Lab’s monitoring service. Internet threat level: 1

Trojan-Downloader.Win32.Small.cyn

Detected Dec 05 2006 01:17 GMT
Released Dec 05 2006 01:17 GMT
Published Jun 19 2007 08:39 GMT

Technical Details
Payload
Removal instructions

Technical Details

This Trojan will download other programs from the Internet and launch them on the victim machine without the user's knowledge or consent. It is a Windows DLL file. The file is 4,096 bytes in size. It is not packed in any way. It is written in Visual C++.

Payload

Once launched, the Trojan downloads a file from the following URL:

http://zenux.info/***/1.exe

This file is saved to the Windows system directory (%System%) as "svchivf.exe". The file is 8 961 bytes in size and will be detected by Kaspersky Anti-Virus as Backdoor.Win32.Agent.aoz. The downloaded file is then launched for execution.

The Trojan also creates a unique identifier, “WaAtTheFuck”, to flag its presence in the system.


Removal instructions

If your computer does not have an up-to-date antivirus, or does not have an antivirus solution at all, follow the instructions below to delete the malicious program:

  1. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
  2. Delete the following file:
    %System%\svchivf.exe
  3. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).

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Trojan-Downloader

Programs classified as Trojan-Downloader download and install new versions of malicious programs, including Trojans and AdWare, on victim computers. Once downloaded from the Internet, the programs are launched or included on a list of programs which will run automatically when the operating system boots up.

Information about the names and locations of the programs which are downloaded are in the Trojan code, or are downloaded by the Trojan from an Internet resource (usually a web page).

This type of malicious program is frequently used in the initial infection of visitors to websites which contain exploits.


Other versions

Aliases

Trojan-Downloader.Win32.Small.cyn (Kaspersky Lab) is also known as:

  • Hoax.Win32.Conycspa.cyn (Kaspersky Lab)
  • Mal/Generic-L (Sophos)
  • Generic Trojan (Panda)
  • Trojan.DownLoad1.60228 (DrWeb)
  • Trojan.Generic.1361244 (BitDef7)
  • Packed/FSG (VirusBuster)
  • Win32:Malware-gen (AVAST)
  • Trojan-Downloader.Win32.Small (Ikarus)
  • Downloader.Generic9.BJAM (AVG)
  • TR/Crypt.XPACK.Gen (AVIRA)
  • Downloader (NAV)
  • NseCheckFile2() returned 0x00010018 (Norman)
  • Packed/FSG (VirusBusterBeta)