Backdoor:W32/IRCBot.DDR

Classification

Malware

Backdoor

W32

Backdoor:W32/IRCBot.DDR

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

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

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