Content

Downloader-KP

Type
Trojan
SubType
Dropper
Discovery Date
05/27/2004
Length
1,136 Bytes (Packed) 16,909 Bytes (Unpacked)
Minimum DAT
4364 (06/02/2004)
Updated DAT
4696 (02/14/2006)
Minimum Engine
5.1.00
Description Added
05/27/2004
Description Modified
06/10/2004 3:30 AM (PT)
Risk Assessment
Corporate User
Low
Home User
Low

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Characteristics

This is not an email virus. This downloader trojan arrives in a file named msstasks.exe (FSG-packed). 

The following files are downloaded upon execution of the file mentioned above: 

msrexe.exe 31,774 bytes BackDoor-AML  trojan
tmp001.exe 1,152 bytes Downloader-KP (FSG packed ) trojan
tmp1.exe 11,296 bytes DDoS-Decill trojan
child.dll 8,192 bytes Downlaoder-GS
aux.exe   64,380 bytes Still under analysis

The following registry entries were made:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    "aux.exe" = "aux.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    "System Service" = "msrexe.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Swartax
    "ImagePath" = "msrexe.exe"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices
    "aux.exe" = "aux.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Swartax
    "ImagePath" = "msrexe"

Symptoms

  • Presence of the files listed above
  • Precence of the registry entries listed above

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, etc. Trojans may also be received as a result of poor security practices (weak username/password combination on open shares, lack of/or misconfigured firewall protection), or unpatched and vulnerable systems.

Removal

All Users:
Use specified engine and DAT files for detection.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the current engine and the specified DATs (or higher). Older engines may not be able to remove all registry keys created by this threat.

Additional Windows ME/XP removal considerations

Variants

Variants

    N/A

All Information

Overview -

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Characteristics

Characteristics -

This is not an email virus. This downloader trojan arrives in a file named msstasks.exe (FSG-packed). 

The following files are downloaded upon execution of the file mentioned above: 

msrexe.exe 31,774 bytes BackDoor-AML  trojan
tmp001.exe 1,152 bytes Downloader-KP (FSG packed ) trojan
tmp1.exe 11,296 bytes DDoS-Decill trojan
child.dll 8,192 bytes Downlaoder-GS
aux.exe   64,380 bytes Still under analysis

The following registry entries were made:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    "aux.exe" = "aux.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    "System Service" = "msrexe.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Swartax
    "ImagePath" = "msrexe.exe"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices
    "aux.exe" = "aux.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Swartax
    "ImagePath" = "msrexe"

Symptoms

Symptoms -

  • Presence of the files listed above
  • Precence of the registry entries listed above

Method of Infection

Method of Infection -

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, etc. Trojans may also be received as a result of poor security practices (weak username/password combination on open shares, lack of/or misconfigured firewall protection), or unpatched and vulnerable systems.

Removal -

Removal -

All Users:
Use specified engine and DAT files for detection.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the current engine and the specified DATs (or higher). Older engines may not be able to remove all registry keys created by this threat.

Additional Windows ME/XP removal considerations

Variants

Variants -

    N/A