WORM_RBOT.BNQ

Malware type: Worm

Aliases: Backdoor.Win32.Rbot.gen (Kaspersky), Generic.el !! (McAfee), W32.Spybot.Worm (Symantec), Worm/Rbot.70656.11 (Avira), Mal/Packer (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP, Server 2003

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This memory-resident worm propagates through network shares. Upon execution, it drops a copy of itself as the file MPCI.EXE in the Windows system folder. It then attempts to place copies of itself into accessible shared folders across a network. It may attempt to use its own compiled list of user names and passwords in order to access shared folders that are password protected.

It also takes advantage of the following Windows vulnerabilities to propagate:

  • RPC DCOM buffer overflow vulnerability
  • LSASS buffer overrun vulnerability

For more information regarding these vulnerabilities, please refer to the following Microsoft Web page(s):

It also has backdoor capabilities. It comes with a built-in Internet Relay Chat (IRC) bot that allows it to connect to an IRC server. The IRC bot then runs in the background and waits for commands from a remote user. An IRC bot is an automated software program that can execute certain commands when it receives specific input (usually from the malwares creator), thus allowing a remote user to manipulate infected machines. Once connected, the remote user may gain virtual control of the affected system.

Through this backdoor, the remote user can command the affected system to conduct Distributed Denial of Service (DDoS) attacks, steal the CD keys from certain PC games, and other malicious actions.

For additional information about this threat, see:

Description created: May. 29, 2005 11:21:34 PM GMT -0800


TECHNICAL DETAILS


File type: PE

Memory resident:  Yes

Size of malware: 69,066 Bytes (compressed)
1,478,656 Bytes (uncompressed)

Ports used: Random Ports

Initial samples received on: May 26, 2005

Compression type: MEW

Vulnerability used:  (MS04-011) Security Update for Microsoft Windows (835732), (MS03-026) Buffer Overrun In RPC Interface Could Allow Code Execution

Payload 1: Compromises system security

Payload 2: Steals CD keys and other system information

Payload 3: Performs various DDoS attacks

Details:

Installation and Autostart Techniques

This memory-resident worm propagates through network shares. Upon execution, it drops a copy of itself as the file MPCI.EXE in the Windows system folder. It then attempts to place copies of itself into accessible shared folders across a network.

It creates the following registry entries to ensure it automatically executes during every Windows startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Run
Windows Workstation = "mpci.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\RunServices
Windows Workstation = "mpci.exe"

HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run
Windows Workstation = "mpci.exe"

Propagation via Network Shares

This worm propagates by dropping copies of itself into accessible network shares. It may search for, and drop copies of itself into the following folders:

  • ADMIN$\
  • IPC$\

It may attempt to use the following compiled list of user names and passwords in order to access shared folders that are password protected:

  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • access
  • accounting
  • accounts
  • administrador
  • administrat
  • administrateur
  • administrator
  • admins
  • backup
  • bitch
  • blank
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • computer
  • control
  • database
  • databasepass
  • databasepassword
  • db1234
  • dbpass
  • dbpassword
  • default
  • domain
  • domainpass
  • domainpassword
  • exchange
  • george
  • guest
  • hello
  • homeuser
  • internet
  • intranet
  • katie
  • linux
  • login
  • loginpass
  • nokia
  • oeminstall
  • oemuser
  • office
  • oracle
  • orainstall
  • outlook
  • owner
  • pass1234
  • passwd
  • password
  • password1
  • peter
  • qwerty
  • server
  • siemens
  • sqlpassoainstall
  • staff
  • student
  • susan
  • system
  • teacher
  • technical
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp
  • wwwadmin

Exploits

This worm takes advantage of the following Windows vulnerabilities to propagate:

  • RPC DCOM buffer overflow vulnerability
  • LSASS buffer overrun vulnerability

For more information regarding these vulnerabilities, please refer to the following Microsoft Web page(s):

Backdoor Routine

This worm also has backdoor capabilities. It comes with a built-in Internet Relay Chat (IRC) bot that allows it to connect to a specific IRC Server. It then waits for commands from a remote user. An IRC bot is an automated software program that can execute certain commands when it receives specific input (usually from the malware�s creator), thus allowing a remote user to manipulate infected machines. Once connected, the remote user may gain virtual control of the affected system. The remote user can then execute the following malicious actions:

  • Create threads
  • Execute files
  • Flush DNS cache
  • List and terminate processes and services
  • List, open, read and delete files
  • Scan IPs, threads and ports
  • Shut down/restart a system
  • Sniff and send packets
  • Upload and download files

Denial of Service Attack

Denial of Service (DoS) attacks disrupt the normal functions of a targeted Web site or group of Web sites, creates massive network traffic, and taxes IT infrastructure and resources. DoS attacks typically flood Web sites or servers with requests that may slow down or even crash the target site altogether. Having multiple computers attacking a single site constitute a Distributed Denial of Service (DDoS) attack.

This worm enables malicious users to launch the following types of DDoS attacks against a target site:

  • ICMP flood
  • Ping flood
  • SYN flood
  • TCP flood
  • UDP flood

Information Theft

This worm steals the CD keys of the following PC games, if they are installed on the system:

  • Battlefield 1942
  • Battlefield 1942 (Road To Rome)
  • Battlefield 1942 (Secret Weapons of WWII)
  • Battlefield Vietnam
  • Black and White
  • Call of Duty
  • Chrome
  • 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 (Retail)
  • FarCry
  • FIFA 2002
  • FIFA 2003
  • Freedom Force
  • Global Operations
  • Ground Control II
  • Gunman Chronicles
  • Half-Life
  • Hidden & Dangerous 2
  • IGI 2: Covert Strike
  • Industry Giant 2
  • James Bond 007: Nightfire
  • Joint Operations
  • 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

This worm also launches a carnivore sniffer to retrieve passwords and other information. It searches for the following strings:

  • : auth
  • :!advscan
  • :!asc
  • :!auth
  • :!hashin
  • :!login
  • :!scan.all
  • :!scan.start
  • :!scan.startall
  • :!secure
  • :!secure
  • :!start.scan
  • :!syn
  • :#advscan
  • :#asc
  • :#login
  • :#scan.all
  • :#scan.start
  • :#scan.startall
  • :#secure
  • :#start.scan
  • :$advscan
  • :$asc
  • :$auth
  • :$hashin
  • :$login
  • :$scan.all
  • :$scan.start
  • :$scan.startall
  • :$secure
  • :$start.scan
  • :$syn
  • :%auth
  • :%hashin
  • :%login
  • :%login
  • :%syn
  • :&auth
  • :&login
  • :*auth
  • :*login
  • :*login
  • :,auth
  • :,login
  • :.advscan
  • :.asc
  • :.auth
  • :.hashin
  • :.login
  • :.scan.all
  • :.scan.start
  • :.scan.startall
  • :.secure
  • :.secure
  • :.start.scan
  • :.syn
  • :/auth
  • :/login
  • :?auth
  • :?login
  • :@advscan
  • :@asc
  • :@auth
  • :@login
  • :@scan.all
  • :@scan.startall
  • :@secure
  • :\auth
  • :\login
  • :~auth
  • :~login
  • :%20auth
  • :%20login
  • :=auth
  • :=login
  • :'auth
  • :-auth
  • :login
  • :'login
  • :-login
  • login
  • login

Analysis By: Anne Leonor Garcia Marcos

Revision History:

First pattern file version: 3.962.03
First pattern file release date: Nov 28, 2006

SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 3.963.00

Pattern release date: Nov 28, 2006


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.BNQ.

Trend Micro customers need to download the latest pattern file before scanning their system. Other users can use Housecall, Trend Micro's 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.

Editing the Registry

This malware modifies the system's registry. Users affected by this malware may need to modify or delete specific registry keys or entries. For detailed information regarding registry editing, please refer to the following articles from Microsoft:

  1. About the Registry and How to Use Registry Editor
  2. HOW TO: Backup, Edit, and Restore the Registry in Windows 95, Windows 98, and Windows Me
  3. HOW TO: Backup, Edit, and Restore the Registry in Windows NT 4.0
  4. HOW TO: Back Up, Edit, and Restore the Registry in Windows XP
  5. HOW TO: Backup, Edit, and Restore the Registry in Windows 2000

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:

  3. HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>
    Windows>CurrentVersion>Run
  4. In the right panel, locate and delete the entry:

  5. Windows Workstation = "mpci.exe"
  6. In the left panel, double-click the following:

  7. HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>
    Windows>CurrentVersion>RunServices
  8. In the right panel, locate and delete the entry:

  9. Windows Workstation = "mpci.exe"
  10. In the left panel, double-click the following:

  11. HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>Run
  12. In the right panel, locate and delete the entry:

  13. Windows Workstation = "mpci.exe"
  14. Close Registry Editor.

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 set(s).

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete files detected as WORM_RBOT.BNQ. 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 online virus scanner.

Applying Patches

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

Trend Micro advises users to download critical patches upon release by vendors.


Trend Micro offers best-of-breed antivirus and content-security solutions for your corporate network, small and medium business, mobile device or home PC.