McAfee > Theat Center > Virus Detail Page

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.

Aliases

• Trojan-Downloader.Win32.Femad.gen: Kaspersky

• Trojan.DownLoader.2471: Doctor Web

Characteristics

Downloaders are designed to pull files from a remote website and execute the files that have been downloaded.

It is trivial for the malware author to modify the Downloader to refer to a different website or web address.

Therefore, it is not possible to guarantee which website and/or port is being communicated with. Also, as the website being communicated with is normally controlled by the malware author, any files being downloaded can be remotely modified and the behaviour of these new binaries altered - possibly with every user infection.

Upon execution it makes internet connections with “http://www.1987324.com/?299”, “http://www.annunci-online.net/?299” and “http://tropezitalia.com/trcpromo-ciccio-main-pmail14-t?299”. It also makes some internet connections in the background with “cc.ad-ware.cc”, “cumhereteens.com”, “www.isuckall.com” and downloads some files without user’s knowledge. It adds links to “http://www.1987324.com/?299” in favorites list of the internet explorer, adds entry in start menu items and drops shortcut on the desktop.

Following folder is added

• C:\Documents and Settings\%User%\Application Data\sgrunt

Following files are added

• sysfind.exe
• sysmon.exe
• IE4321.exe
• moea.exe
• sgru.exe
• x.exe

The following registry value is modified in order to change the default start page of the Internet Explorer

• HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\
  Main "Start Page” = “about:blank”

The following registry entries are added in order to run the trojan on system startup

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
  CurrentVersion\Run "Olympic"
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
  CurrentVersion\Run "Systems"
  

Symptoms

Presence of aforementioned folders, files, registry keys and the modified startpage.

Method of Infection

Downloaders are not viruses, and as such do not themselves contain any method to replicate. However they may themselves be downloaded by other viruses and/or Trojans to be installed on the user's system.

Many of these additionally are mass spammed by the author to entice people into double-clicking on them.

Alternatively they may be installed by visiting a malicious web page (either by clicking on a link, or by the website hosting a scripted exploit which installs the Downloader onto the user's system with no user interaction.

 

Removal

A combination of the latest DATs and the Engine will be able to detect and remove this threat. AVERT recommends users not to trust seemingly familiar or safe file icons, particularly when received via P2P clients, IRC, email or other media where users can share files.

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.

Aliases

• Trojan-Downloader.Win32.Femad.gen: Kaspersky

• Trojan.DownLoader.2471: Doctor Web

Characteristics

Characteristics -

Downloaders are designed to pull files from a remote website and execute the files that have been downloaded.

It is trivial for the malware author to modify the Downloader to refer to a different website or web address.

Therefore, it is not possible to guarantee which website and/or port is being communicated with. Also, as the website being communicated with is normally controlled by the malware author, any files being downloaded can be remotely modified and the behaviour of these new binaries altered - possibly with every user infection.

Upon execution it makes internet connections with “http://www.1987324.com/?299”, “http://www.annunci-online.net/?299” and “http://tropezitalia.com/trcpromo-ciccio-main-pmail14-t?299”. It also makes some internet connections in the background with “cc.ad-ware.cc”, “cumhereteens.com”, “www.isuckall.com” and downloads some files without user’s knowledge. It adds links to “http://www.1987324.com/?299” in favorites list of the internet explorer, adds entry in start menu items and drops shortcut on the desktop.

Following folder is added

• C:\Documents and Settings\%User%\Application Data\sgrunt

Following files are added

• sysfind.exe
• sysmon.exe
• IE4321.exe
• moea.exe
• sgru.exe
• x.exe

The following registry value is modified in order to change the default start page of the Internet Explorer

• HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\
  Main "Start Page” = “about:blank”

The following registry entries are added in order to run the trojan on system startup

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
  CurrentVersion\Run "Olympic"
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
  CurrentVersion\Run "Systems"
  

Symptoms

Symptoms -

Presence of aforementioned folders, files, registry keys and the modified startpage.

Method of Infection

Method of Infection -

Downloaders are not viruses, and as such do not themselves contain any method to replicate. However they may themselves be downloaded by other viruses and/or Trojans to be installed on the user's system.

Many of these additionally are mass spammed by the author to entice people into double-clicking on them.

Alternatively they may be installed by visiting a malicious web page (either by clicking on a link, or by the website hosting a scripted exploit which installs the Downloader onto the user's system with no user interaction.

 

Removal -

Removal -

A combination of the latest DATs and the Engine will be able to detect and remove this threat. AVERT recommends users not to trust seemingly familiar or safe file icons, particularly when received via P2P clients, IRC, email or other media where users can share files.

Additional Windows ME/XP removal considerations

Variants

Variants -

N/A