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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.bxp

Detected Dec 21 2005 15:02 GMT
Released Mar 23 2006 19:06 GMT
Published Dec 21 2005 15:02 GMT

Technical Details

This Trojan downloads files via the Internet without the user's knowledge or consent.

It was initially distributed using spamming techniques.

The Trojan itself is a Windows PE EXE file approximately 5KB in size, packed using FSG. The unpacked file is approximately 33KB in size.

Infected messages

Once launched, the Trojan registers itself in the system registry:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters \firewallpolicy\standardprofile\authorizedapplications\list]
"≶path to Trojan program>" = "≶path to Trojan program>:*:EnaBleD:cvv2"

The Trojan downloads another Trojan program via the Internet, saves it to the victim machine and launches it for execution.


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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.bxp (Kaspersky Lab) is also known as:

  • Trojan-Downoader.Win32.Small.bxp (Kaspersky Lab)
  • Trojan.OnlineGames-1517 (ClamAV)
  • Trj/Brospy.D (Panda)
  • W32/Downloader.KAZ (FPROT)
  • TrojanDownloader:Win32/Small (MS(OneCare))
  • Trojan.DownLoader.5533 (DrWeb)
  • Trojan.Downloader.Small.CW (BitDef7)
  • Trojan.DL.Small.AHR1 (VirusBuster)
  • Trojan-Downloader.Win32.Small.ckj (Ikarus)
  • Downloader.Generic.KAE Downloader.Generic.KAE c.KAE (AVG)
  • Downloader (NAV)
  • Trojan.DL.Small.bie (Rising)