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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.fas

Detected Aug 23 2007 20:43 GMT
Released Aug 23 2007 20:43 GMT
Published Dec 14 2007 15:54 GMT

Technical Details
Payload
Removal instructions

Technical Details

This Trojan downloads other malicious files via the Internet and launches them for execution on the victim machine without the user’s knowledge or consent. It is a Windows PE EXE file. It is 2964 bytes in size.


Payload

The Trojan launches a copy of svchost.exe, a system process, and injects its code into the process, which will in turn download files from the following link:

*****jino-net.ru/4571.jpg.exe

The file will then be saved to the Windows system directory:

%System%\foto.exe

At the moment of writing, the file placed on this link was 70656 bytes in size and detected by Kaspersky Anti-Virus as Trojan-Dropper.Win32.Agent.bot.

The downloaded file is then launched for execution.


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. Use Task Manager to terminate the Trojan process.
  2. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
  3. Delete the following file:
    %System%\foto.exe
  4. 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.fas (Kaspersky Lab) is also known as:

  • Trojan: Generic Downloader.x!dco (McAfee)
  • Mal/Generic-L (Sophos)
  • W32/SecRisk-ProcessPatcher-Sml-based!Maximus (FPROT)
  • TrojanDownloader:Win32/Small.XJ (MS(OneCare))
  • Trojan.DownLoader.26646 (DrWeb)
  • a variant of Win32/TrojanDownloader.Small trojan (Nod32)
  • Generic.Malware.dld!!.BE73D3F5 (BitDef7)
  • Trojan.DL.Small.DEPI (VirusBuster)
  • Win32:Trojan-gen (AVAST)
  • Virus.Win32.Agent.BQC (Ikarus)
  • Downloader.Generic5.CEQ (AVG)
  • TR/ProcPatcher.A (AVIRA)
  • Adware.Lop (NAV)
  • Trojan.DL.Win32.Inject.c (Rising)
  • Trojan-Downloader.Win32.Small.fas [AVP] (FSecure)
  • TROJ_Gen.CX03L4 (TrendMicro)
  • RiskTool.Win32.ProcessPatcher.Sml!cobra (v) (Sunbelt)
  • Trojan.DL.Small.DEPI (VirusBusterBeta)