Discovered: July 6, 2006
Updated: February 13, 2007 12:57:22 PM
Type: Worm
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
When W32.Banwarum.G@mm is executed, it performs the following actions:
- Creates the following mutex:
TurkishCooL
- Creates the following file:
%System%\[RANDOM].dll
Note: %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
- Adds the value:
"(Default)" = "{[RANDOM GUID]}"
to the registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad
so that it runs every time Windows starts.
- Adds the value:
"(Default)" = "%System%\[RANDOM].dll"
to the registry subkey:
HKEY_CLASS_ROOT\CLSID\{[RANDOM GUID]}\InProcSrver32
so that it runs every time Windows starts.
- Adds the values:
"HardNum" = "[RANDOM]"
"LoadNum" = "[RANDOM]"
to the registry subkey:
HKEY_LOCAL_MACHINE_SOFTWARE\Microsoft\Internet Explorer\Main
as infection markers.
- Sends information about the compromised computer to the following Web site:
[http://]85.105.130.110/leema[REMOVED]
- Gathers email addresses from the Windows Address Book.
- Sends the email addresses to the following Web site:
[http://]85.105.130.110/w.p[REMOVED]
- Downloads files from the following Web site:
[http://]85.105.130.110/load[REMOVED]
- Uses Microsoft Outlook to send an email with a .zip file to the addresses that it finds.
The email has the following characteristics:
From: [BLANK]
Subject:
Antivirus project
Message body:
Hi! How are you? This is the best soft from Microsoft Windows Planforms.
I've like it very much...
Attachment:
util_v2_5.zip
- Searches the following registry entries for folders to copy itself to:
HKEY_CURRENT_USER\Software\KaZaa\LocalContent\"Dir0" = "012345:[FOLDER 1]"
HKEY_LOCAL_MACHINE\Software\Morpheus\"Install_Dir" = "[FOLDER 2]"
HKEY_LOCAL_MACHINE\Software\iMesh\Client\"DownloadsLocation" = "[FOLDER 3]"
- Attempts to copy itself to the following folders:
[FOLDER 1]
[FOLDER 2]\My Shared Folder
C:\Program Files\eDonkey2000\incoming
C:\Program Files\LimeWire\Shared
[FOLDER 3]
as the following file names:
Zoo Tycoon.exe
ZoneAlarm.exe
Zone Alarm Security Suite 5.5.062 Crack.exe
XP Slipstreamer v1.0 Crack.exe
XBOX X-Fer Ripper and Transfer.exe
WinZip.exe
WinZip v9.0 Registration.exe
Winzip Keygen.exe
WinZip All Versions keygen.exe
WinZip 9.x Crack.exe
WinRAR.exe
WinRAR All KeyGen.exe
WinRAR 3.x Crack.exe
Windows XP SP2 KeyGen.exe
Windows XP Professional crack.exe
Windows XP Pro 64-bit Crack.exe
Windows XP home edition Activation.exe
Windows XP Activation Crack.exe
Windows Server 2003 SP1 Build 1039-2l Crack.exe
windows server 2003 crack.exe
Sygate Personal Firewall PRO v5.5 Build 2577 Crack.exe
Strip Poker 2004 Crack.exe
Sims 2 Crack.exe
Sim Theme Park World no cd crack.exe
Sim City 4 Deluxe no cd crack.exe
Sim City 4 - Rush Hour no cd crack.exe
RoboForm.exe
RoboForm crack.exe
RealPlayer.exe
RealPlayer Crack.exe
RealPlayer crack (keygen.exe
PINNACLE STUDIO PLUS V9.3 Crack.exe
PhotoShop CS v8.0 Crack.exe
Partition Magic 8.0.exe
Paris Hilton Sex-E Screensaver 1.0.exe
NOD32 AntiVirus 2.12.1 Crack.exe
Nero Burning ROM v6.x crack.exe
Macromedia Flash SWF-Unprotect v2.0.exe
Macromedia Flash MX v6.0 crack.exe
Macromedia Flash All Versions keygen.exe
Macromedia Flash 8 Crack.exe
Macromedia Fireworks 4.0 Patch.exe
Macromedia Dreamweaver UltraDev 4.0 Patch.exe
Macromedia Dreamweaver MX v6.0 crack.exe
Macromedia Dreamweaver MX 2004 7.0 Crack.exe
Macromedia Dreamweaver 4.0 Patch.exe
Macromedia Director 8 Crack.exe
Macromedia Contribute v2.0 crack.exe
Macromedia ColdFusion MX crack.exe
K-Lite Mega Codec Pack 1.13 Keygen.exe
K-Lite Codec Pack v2.31 Full Crack.exe
KaZaA Lite Plus 1.0.exe
Kazaa Download Manager 3.0.exe
Kazaa Download Accelerator Pro.exe
Internet Download Manager v4.02 Crack.exe
Internet Download Manager 4.03.exe
FrontPage XP 2002 Crack.exe
visualroute 9.3g keygen.exe
visualroute 9.3g crack.exe
Firefox Setup 1.5.0.3.exe
opera 9.exe
CuteFTP 7 Professional crack.exe
cuteftppro.exe
Final Fantasy XII crack.exe
Final Fantasy XI - USA no cd crack.exe
Final Fantasy VII - Advent Children crack.exe
fifa 2006.exe
Fifa 2006 Crack.exe
eMule.exe
eMule 0.44b.exe
divX codec.exe
DivX Player Crack.exe
DivX Player (with DivX Codec).exe
CloneCD KeyGen.exe
CloneCD 5.x Crack.exe
Civilization IV.exe
CD to MP3 Freeware 1.5 .exe
BitComet.exe
AOL Instant Messenger (AIM).exe
All Macromedia Keygen.exe
Alcohol 120% v1.9.2 build 1705 Crack.exe
Ahead Nero Burning 7 Ultra
Agnitum Outpost Firewall 3.51.x Crack.exe
Ad-aware.exe
Ad-aware Professional.exe
Ad-aware Pro Crack.exe
acdsee 8 Crack.exe
ABBY FineReader Pro Crack.exe
3D Studio Max 6 Crack.exe
windowsxpserial.exe
wincrack.exe
windowsvista.exe
sex.exe
blacksex.exe
asiansex.exe
Eminem.exe
Britneysex.exe
BritneySpears.exe
Xbox360.exe
- Displays the following message to the user:

If the user clicks Yes, it displays the following message:

If the user clicks Yes, it displays the following message:

- Deletes the file of itself that first executed.
Recommendations
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":
- Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
- Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
- Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
- Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
- Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
- Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
- If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
- Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
- Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
- Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
- Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
- If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
- For further information on the terms used in this document, please refer to the Security Response glossary.
Writeup By: Kazumasa Itabashi