Threat Description

Backdoor:​W32/IRCBot.DDR

Details

Aliases:Backdoor:​W32/IRCBot.DDR
Category:Malware
Type:Backdoor
Platform:W32

Summary



A Bot, sometimes referred to as Zombie, is a computer that has been infected with malware that allows a remote malicious user access to the computer. This Bot attempts to spread via MSN Messenger.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details



Upon execution this malware drops a copy of itself in the following directory:

  • %windir%\livemessenger.com

Note: %windir% is typically C:\Windows

It also displays the following:

There is no picture, the message is false and is used as a decoy.

It creates an autostart function by adding the following registry keys:

  • HKLM\Software\Microsoft\Windows\CurrentVersion\Run Microsoft Update = livemessenger.com
  • HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce Microsoft Update = livemessenger.com
  • HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnceEx Microsoft Update = livemessenger.com

It disable the Task Manager and the Registry Editor by setting the following:

  • HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System DisableTaskMgr = 00000001 DisableRegistrytools = 00000001

This backdoor has keylogging capabilities and saves all the data to the following location:

  • %windir%\admintxt.txt.

Like many other typical Bots, it connects to a server on port 1863 and waits for a command from a remote hacker.

IRCBot attempts to connect to the following site:

  • http://msg.sig-clan.com

This Bot has the following commands:

  • Download and execute files
  • Get the Bot's up-time
  • Join/Quit IRC channel
  • Key-logging
  • Kill processes
  • Send private message on IRC
  • Spread the Bot via MSN messenger
  • Update the Bot





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