WORM_RBOT.GAB

Malware type: Worm

Aliases: No Alias Found

In the wild: Yes

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This worm arrives as FILEES.EXE on target machines. It spreads by dropping a copy of itself in a list of shared folders. If the said shares are inaccessible, it uses a hardcoded list of user names and passwords to gain access.

It may also spread by taking advantage of systems vulnerable to the following Windows exploits:

  • The RPC/DCOM vulnerability, which allows an attacker to gain full access and execute any code on a target machine by sending a malformed packet to the DCOM service. It uses the RPC TCP port 135. More information on this vulnerability is found in Microsoft Security Bulletin MS03-026.

  • The Windows LSASS vulnerability, which is a buffer overrun that allows remote code execution and enables a malicious user to gain full control of the affected system. This vulnerability is discussed in detail in Microsoft Bulletin MS04-011 and Trend Micro's Vulnerability Description for MS04-011.

This worm connects to an IRC server and joins a specific channel, where it listens for commands from a remote malicious user. The said commands are executed locally on affected machines. It performs a distributed denial of service attack against target sites using different flood methods. It also steals Windows product ID as well as CD keys of popular games.

For additional information about this threat, see:

Description created: Feb. 16, 2005 2:28:34 PM GMT -0800


TECHNICAL DETAILS


File type: PE

Memory resident:  Yes

Size of malware: 91,136 Bytes

Ports used: Random

Initial samples received on: Feb 17, 2005

Compression type: Morphine

Details:

Installation and Autostart

Upon execution, this worm drops a copy of itself as FILEES.EXE in the Windows system folder. The said file's attributes are set to read-only, hidden and system.

It creates the following autostart entries to ensure its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
NTFSS MICROSOFT SYSTEM = "filees.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
NTFSS MICROSOFT SYSTEM = "filees.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
NTFSS MICROSOFT SYSTEM = "filees.exe"

Network Propagation and Exploits

This worm spreads by dropping a copy of itself in the following shared folders:

  • ADMIN$\system32
  • C$\Windows\system32
  • C$\WINNT\system32
  • IPC$

If the said shares are inaccessible, it uses the following list of user names and passwords hardcoded in its body to gain access:

User names

  • access
  • accounting
  • accounts
  • backup
  • bitch
  • blank
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • control
  • databasepass
  • databasepassword
  • db1234
  • dbpass
  • dbpassword
  • domain
  • domainpass
  • domainpassword
  • exchange
  • george
  • hello
  • homeuser
  • internet
  • intranet
  • katie
  • linux
  • login
  • loginpass
  • nokia
  • oeminstall
  • oemuser
  • office
  • orainstall
  • outlook
  • peter
  • qwerty
  • server
  • siemens
  • sqlpassoainstall
  • susan
  • system
  • technical
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp

Passwords

  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • administrador
  • administrat
  • administrateur
  • administrator
  • admins
  • computer
  • database
  • default
  • guest
  • oracle
  • owner
  • pass1234
  • passwd
  • password
  • password1
  • staff
  • student
  • teacher
  • wwwadmin

This worm may also spread by taking advantage of systems vulnerable to the following Windows exploits:

  • The RPC/DCOM vulnerability, which allows an attacker to gain full access and execute any code on a target machine by sending a malformed packet to the DCOM service. It uses the RPC TCP port 135. More information on this vulnerability is found in Microsoft Security Bulletin MS03-026.

  • The Windows LSASS vulnerability, which is a buffer overrun that allows remote code execution and enables a malicious user to gain full control of the affected system. This vulnerability is discussed in detail in Microsoft Bulletin MS04-011 and Trend Micro's Vulnerability Description for MS04-011.

Denial of Service

This worm performs a distributed denial of service attack against target sites using any of the following flood methods:

  • Ping flood
  • SYN flood
  • UDP flood

Backdoor Capabilities

This worm connects to an IRC server and joins a specific channel, where it listens for commands from a remote malicious user. The said commands, such as the following, are executed locally on affected machines:

  • Scan ports
  • HTTP operations
  • FTP operations
  • DCC send
  • Download and upload files to infected system
  • Log Keystrokes
  • Start and stop services
  • IRC operations
  • Find and execute files
  • Perform IP redirection
  • Delete netwok shared folders

Information Theft

This worm steals Widnows product ID as well as CD keys of the following games:

  • Battlefield 1942
  • Battlefield 1942 (Road To Rome)
  • Battlefield 1942 (Secret Weapons of WWII)
  • Battlefield Vietnam
  • Black and White
  • Command and Conquer: Generals
  • Command and Conquer: Generals (Zero Hour)
  • Command and Conquer: Red Alert
  • Command and Conquer: Red Alert 2
  • Command and Conquer: Tiberian Sun
  • Counter-Strike
  • FIFA 2002
  • FIFA 2003
  • Freedom Force
  • Global Operations
  • Gunman Chronicles
  • Half-Life
  • Hidden & Dangerous 2
  • IGI 2: Covert Strike
  • Industry Giant 2
  • James Bond 007: Nightfire
  • Legends of Might and Magic
  • Medal of Honor: Allied Assault
  • Medal of Honor: Allied Assault: Breakthrough
  • Medal of Honor: Allied Assault: Spearhead
  • Nascar Racing 2002
  • Nascar Racing 2003
  • Need For Speed Hot Pursuit 2
  • Need For Speed: Underground
  • Neverwinter Nights
  • Neverwinter Nights (Hordes of the Underdark)
  • Neverwinter Nights (Shadows of Undrentide)
  • NHL 2002
  • NHL 2003
  • Rainbow Six III RavenShield
  • Shogun: Total War: Warlord Edition
  • Soldier of Fortune II - Double Helix
  • Soldiers Of Anarchy
  • The Gladiators
  • Unreal Tournament 2003
  • Unreal Tournament 2004

Platform

This worm runs on Windows 95, 98, ME, NT, 2000, and XP.

Analysis By: Gian Carlo Dogma Madrigal

Revision History:

First pattern file version: 4.502.02
First pattern file release date: May 29, 2007

SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 4.503.00

Pattern release date: May 30, 2007


Important note: The "Minimum scan engine" refers to the earliest Trend Micro scan engine version guaranteed to detect this threat. However, Trend Micro strongly recommends that you update to the latest version in order to get comprehensive protection. Download the latest scan engine here.

Solution:

Identifying the Malware Program

To remove this malware, first identify the malware program.

  1. Scan your system with your Trend Micro antivirus product.
  2. NOTE all files detected as WORM_RBOT.GAB.

Trend Micro customers need to download the latest pattern file before scanning their system. Other users can use Housecall, Trend Micro�s free online virus scanner.

Terminating the Malware Program

This procedure terminates the running malware process. You will need the name(s) of the file(s) detected earlier.

  1. Open Windows Task Manager.
    � On Windows 95, 98, and ME, press
    CTRL%20ALT%20DELETE
    � On Windows NT, 2000, and XP, press
    CTRL%20SHIFT%20ESC, then click the Processes tab.
  2. In the list of running programs*, locate the malware file(s) detected earlier.
  3. Select one of the detected files, then press either the End Task or the End Process button, depending on the version of Windows on your system.
  4. Do the same for all detected malware files in the list of running processes.
  5. To check if the malware process has been terminated, close Task Manager, and then open it again.
  6. Close Task Manager.

*NOTE: On systems running Windows 95, 98, and ME, Windows Task Manager may not show certain processes. You can use a third party process viewer such as Process Explorer to terminate the malware process. Otherwise, continue with the next procedure, noting additional instructions.

Removing Autostart Entries from the Registry

Removing autostart entries from the registry prevents the malware from executing at startup.

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>Run
  3. In the right panel, locate and delete the entry:
    NTFSS MICROSOFT SYSTEM = "filees.exe"
  4. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>RunServices
  5. In the right panel, locate and delete the entry:
    NTFSS MICROSOFT SYSTEM = "filees.exe"
  6. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>Run
  7. In the right panel, locate and delete the entry:
    NTFSS MICROSOFT SYSTEM = "filees.exe"
  8. Close Registry Editor.

NOTE: If you were not able to terminate the malware process as described in the previous procedure, restart your system.

Enabling Show All Files

This procedure allows you to access hidden malware files using Windows Explorer.

� On Windows 95, 98, and NT

  1. Open Windows Explorer. Right-click Start then click Explore.
  2. On the View menu, click Options or Folders Options.
  3. Click the View tab.
  4. Select Show all files, then click OK.

� On Windows ME, 2000, and XP

  1. Open Windows Explorer. Right-click Start then click Explore.
  2. On the Tools menu, click Folder Options.
  3. Click the View tab.
  4. Select Show hidden files and folders, then click OK.

Additional Windows ME/XP Cleaning Instructions

Users running Windows ME and XP must disable System Restore to allow full scanning of infected systems.

Users running other Windows versions can proceed with the succeeding procedure sets.

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete all files detected as WORM_RBOT.GAB. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other Internet users can use HouseCall, Trend Micro�s free online virus scanner.

Applying Patches

This malware exploits known vulnerabilities in Windows. Download and install the fix patch supplied by Microsoft in the following pages:

Refrain from using the affected software until the appropriate patch has been installed.




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