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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.crd

Detected May 18 2006 14:12 GMT
Released May 18 2006 14:12 GMT
Published Nov 13 2006 11:44 GMT

Technical Details
Payload
Removal instructions

Technical Details

This Trojan downloads files via the Internet without the user’s knowledge or consent. It is a Windows DLL file. The file is 4096 bytes in size. It is written in Assembler.


Payload

When launching, the Trojan creates a unique identifier, "hacks_work_” to flag its presence in the system.

It then creates a thread which it uses to download a file from the following URL:

http://***w.info/backup.exe

It saves this file to the Windows system directory under a random name with an .exe extension. It then launches the file for execution and ceases running.

Kaspersky Anti-Virus will detect this file as Trojan-Downloader.Win32.Small.cqs


Removal instructions

  1. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
  2. 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.crd (Kaspersky Lab) is also known as:

  • VirTool.Win32.DsBot.crd (Kaspersky Lab)
  • Net-Worm.MSWord.Zlob.crd (Kaspersky Lab)
  • IM-Flooder.Win32.Bancos.crd (Kaspersky Lab)
  • Constructor.Win32.Delf.crd (Kaspersky Lab)
  • Trojan: Generic.dx!uph (McAfee)
  • Mal/Behav-290 (Sophos)
  • Heuristic.WinPE-Statistical (Panda)
  • W32/Heuristic-410!Eldorado (FPROT)
  • TrojanDownloader:Win32/Small.AABH (MS(OneCare))
  • Trojan.Proxy.952 (DrWeb)
  • a variant of Win32/TrojanDownloader.Small.MGLWNQO trojan (Nod32)
  • Trojan.Downloader.Small.CRD (BitDef7)
  • Trojan.DL.Small.Gen!Pac5 (VirusBuster)
  • Win32:Small-BRN [Trj] (AVAST)
  • Trojan-Dropper.Agent (Ikarus)
  • Downloader.Generic2.BXA (AVG)
  • TR/Dldr.Age.10449.A (AVIRA)
  • Trojan.Gen (NAV)
  • NseCheckFile2() returned 0x00010018 (Norman)
  • [Suspicious] (Rising)
  • Mal_DLDER (TrendMicro)
  • Trojan.DL.Small.Gen!Pac5 (VirusBusterBeta)