Exterminate It! Antimalware


Known threats:700,086 Last Update:March 16, 12:51


Hello, I wanted to say thanks for the time you guys spent on getting that Vundo trojan off my computer.

Thanks again, I am highly recommending your software to friends and partners because of the extra effort I know you went to.

Michael M.


Aliases of IRC.Flood.bc (AKA):

[Panda]Application/SlimFTP.C, Bck/Dobea, Bck/IRCFlood.N, Bck/Zcrew.B, mIRC/Winhelp, W32/Tzet.B.worm, Worm Generic.LC
[CA]Backdoor/IRC.Flood.bc, Backdoor/IRC.Flood.F, Backdoor/IRCFlood.C, mIRC/Flood.D, Pirch/Sub7.Acnu!Trojan

How to Remove IRC.Flood.bc from Your Computer^

To completely purge IRC.Flood.bc from your computer, you need to delete the files, folders, Windows registry keys and registry values associated with IRC.Flood.bc. These files, folders and registry elements are respectively listed in the Files, Folders, Registry Keys and Registry Values sections on this page.

For instructions on deleting the IRC.Flood.bc registry keys and registry values,
see How to Remove IRC.Flood.bc from the Windows Registry.

For instructions on deleting the IRC.Flood.bc files and folders,
see How to Delete IRC.Flood.bc Files (.exe, .dll, etc.)

How to Delete IRC.Flood.bc Files (.exe, .dll, etc.)^

The files and folders associated with IRC.Flood.bc are listed in the Files and Folders sections on this page.

To delete the IRC.Flood.bc files and folders:

  1. Using your file explorer, browse to each file and folder listed in the Folders and Files sections.
  2. Note: The paths use certain special folders (conventions) such as [%PROGRAM_FILES%]. Please note that these conventions are depending on Windows Version / Language. These conventions are explained here.
  3. Select the file or folder and press SHIFT+Delete on the keyboard.
  4. Click Yes in the confirm deletion dialog box.
  5. IMPORTANT: If a file is locked (in use by some application), its deletion will fail (the Windows will display a corresponding message).You can delete such locked files with the RemoveOnReboot utility. To delete a locked file, right-click on the file, select Send To->Remove on Next Reboot on the menu and restart your computer. You can install the RemoveOnReboot utility from here.
[%PROGRAM_FILES%]\VIP SCript\mirc.exe
[%SYSTEM_DRIVE%]\Friends-N-Song-Script old\Friends-N-Song-Script\mirc.exe
[%SYSTEM_DRIVE%]\Friends-N-Song-Script old\mirc.exe
[%DESKTOP%]\Nuova cartella\[IdeG]Script\mirc.exe
[%SYSTEM_DRIVE%]\BorgIRC 2\mirc.exe
[%PROGRAM_FILES%]\MIRC TRM\torrentsrmine\mirc32.exe
[%PROGRAM_FILES%]\BlacK IRC sCript\mirc.exe
[%PROGRAM_FILES%]\mIRCDost Group\mIRCDost v3\mirc.exe
[%PROGRAM_FILES%]\Beirut Script Version 5e\mirc.exe
[%APPDATA%]\mIRC\downloads\Mirc da sendare\mirc.exe
[%SYSTEM%]\system securety

How to Remove IRC.Flood.bc from the Windows Registry^

The Windows registry stores important system information such as system preferences, user settings and installed programs details as well as the information about the applications that are automatically run at start-up. Because of this, spyware, malware and adware often store references to their own files in your Windows registry so that they can automatically launch every time you start up your computer.

To effectively remove IRC.Flood.bc from your Windows registry, you must delete all the registry keys and values associated with IRC.Flood.bc, which are listed in the Registry Keys and Registry Values sections on this page.

IMPORTANT: Because the registry is a core component of your Windows system, it is strongly recommended that you back up the registry before you begin deleting keys and values. For information about backing up the Windows registry, refer to the Registry Editor online help.

To remove the IRC.Flood.bc registry keys and values:

  1. On the Windows Start menu, click Run.
  2. In the Open box, type regedit and click OK.
    The Registry Editor window opens. This window consists of two panes. The left pane displays folders that represent the registry keys arranged in hierarchical order. The right one lists the registry values of the currently selected registry key.
  3. To delete each registry key listed in the Registry Keys section, do the following:
    • Locate the key in the left pane of the Registry Editor window by sequentially expanding the folders according to the path indicated in the Registry Keys section. For example, if the path of a registry key is
      sequentially expand the HKEY_LOCAL_MACHINE, software, FolderA and FolderB folders.
    • Select the key name indicated at the end of the path (KeyName1 in the example above).
    • Right-click the key name and select Delete on the menu.
    • Click Yes in the Confirm Key Delete dialog box.
  4. To delete each registry value listed in the Registry Values section, do the following:
    • Display the value in the right pane of the Registry Editor window by sequentially expanding the folders in the left pane according to the path indicated in the Registry Values section and selecting the specified key name. For example, if the path of a registry value is
      sequentially expand the HKEY_LOCAL_MACHINE, software, FolderA and FolderB folders and select the KeyName2 key to display the valueC value in the right pane.
    • In the right pane, select the value name indicated after a comma at the end of the path (valueC in the example above).
    • Right-click the value name and select Delete on the menu.
    • Click Yes in the Confirm Value Delete dialog box.
Registry Keys
Registry Values
[HKEY_CURRENT_USER\software\winrar sfx]c%%windows%temp%spoolsv%=[%WINDOWS%]\temp\spoolsv\
[HKEY_CURRENT_USER\software\microsoft\windows nt\currentversion\windows]run=[%SYSTEM%]\drivers\nvidia\dll\rundll.exe
[HKEY_CURRENT_USER\software\winrar sfx]c%%windows%system32%drivers%nvidia%=[%SYSTEM%]\drivers\nvidia\
[HKEY_LOCAL_MACHINE\software\microsoft\windowsd\currentversion\run] meshal=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run] meshal=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\mirc]uninstallstring=[%SYSTEM%]\drivers\nvidia\dll\rundll.exe -uninstall


Worms are generally considered to be a subset of viruses, but have key differences. Unlike a virus, a worm is a computer program that replicates, but does not infect other files. Instead, a worm installs itself on a computer and then looks for a way to spread to other computers.

From a user’s perspective, there are noticeable differences. The longer a virus goes undetected, the more files it will infect on the victim computer. By contrast, there is just a single instance of the worm code on the computer.

Like viruses, worms are often subdivided according to the methods they use to infect a system. E-mail worms are distributed as attachments to e-mail messages. IM worms are attached to messages sent with instant messaging programs (such as IRC or ICQ). P2P (peer-to-peer) worms use file-sharing networks to spread. Network worms spread directly over the LAN (Local Area Network) or across the Internet, often exploiting a specific vulnerability.

Be Aware of the Following Worm Threats:

Yaha.K, SysLog, Win32.P2P.SpyBot.Wuaumqr, Astef (ReSpan), Proj.


Of all trojans, backdoor trojans pose the greatest danger to users’ PCs because they give their authors remote control over infected computers. They are downloaded, installed, and run silently, without the user’s consent or knowledge. Upon installation, backdoor trojans can be instructed to send, receive, execute and delete files, gather and transfer confidential data from the computer, log all activity on the computer, and perform other harmful activities.

Be Aware of the Following Backdoor Threats:

Bling, Zany, SandBoxer, Win32.RemoteSOB, Horns.


A DoS (Denial of Service) attack is designed to disrupt or stop the normal running of a Web site, server, or other network resource. Hackers or malware writers resort to various ways to achieve this. A DoS attack can commonly result in a server being flooded with more network traffic than it is capable of processing. This hinders or prevents the server’s normal operation and sometimes causes its complete failure.

Unlike a DoS attack, a DDoS attack employs multiple PCs. The hacker or malware writer normally uses one infected computer - “master” - to centrally coordinate the attack across other, so-called “zombie”, computers. Typically, the malware writer gains control of both master and zombie computers by exploiting a weakness in an application or the operating system on those computers, in order to install a trojan or other malicious code.

Be Aware of the Following DoS Threats:

Sparse, Uniq, W95.Ussu.dr, Grog.Delirious, Xitami.win95.

How Did My PC Get Infected with IRC.Flood.bc?^

The following are the most likely reasons why your computer got infected with IRC.Flood.bc:

  • Your operating system and Web browser's security settings are too lax.
  • You are not following safe Internet surfing and PC practices.

Downloading and Installing Freeware or Shareware

Small-charge or free software applications may come bundled with spyware, adware, or programs like IRC.Flood.bc. Sometimes adware is attached to free software to enable the developers to cover the overhead involved in created the software. Spyware frequently piggybacks on free software into your computer to damage it and steal valuable private information.

Using Peer-to-Peer Software

The use of peer-to-peer (P2P) programs or other applications using a shared network exposes your system to the risk of unwittingly downloading infected files, including malicious programs like IRC.Flood.bc.

Visiting Questionable Web Sites

When you visit sites with dubious or objectionable content, trojans-including IRC.Flood.bc, spyware and adware, may well be automatically downloaded and installed onto your computer.

Detecting IRC.Flood.bc^

The following symptoms signal that your computer is very likely to be infected with IRC.Flood.bc:

PC is working very slowly

IRC.Flood.bc can seriously slow down your computer. If your PC takes a lot longer than normal to restart or your Internet connection is extremely slow, your computer may well be infected with IRC.Flood.bc.

New desktop shortcuts have appeared or the home page has changed

IRC.Flood.bc can tamper with your Internet settings or redirect your default home page to unwanted web sites. IRC.Flood.bc may even add new shortcuts to your PC desktop.

Annoying popups keep appearing on your PC

IRC.Flood.bc may swamp your computer with pestering popup ads, even when you're not connected to the Internet, while secretly tracking your browsing habits and gathering your personal information.

E-mails that you didn't write are being sent from your mailbox

IRC.Flood.bc may gain complete control of your mailbox to generate and send e-mail with virus attachments, e-mail hoaxes, spam and other types of unsolicited e-mail to other people.