WORM_RBOT.NJ

Malware type: Worm

Aliases: Backdoor.Win32.Rbot.bm (Kaspersky), W32/Sdbot.worm.gen (McAfee), W32.Spybot.Worm (Symantec), TR/Spy.Voltino (Avira), W32/Rbot-JH (Sophos),

In the wild: No

Destructive: No

Language: English

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

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This worm may arrive from network shares. To propagate, it uses NetBEUI functions to get available lists of user names and passwords from a system. It lists down available network shares and uses the gathered user names and passwords to access these shares and drop a copy of itself.

It also uses a list of user names and passwords apart from those that were gathered from the system.

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

  • RPC/DCOM vulnerability
  • RPC Locator vulnerability
  • IIS/WebDAV vulnerability

More information on these vulnerabilities can be found in the following Web pages:

This worm may also propagate into systems with vulnerabilities that have been exploited by WORM_SASSER, WORM_BAGLE, and WORM_MYDOOM.

It has backdoor capabilities. It acts as a server program controlled by an Internet Relay Chat (IRC) bot. It connects to an IRC server and then joins an IRC channel. Once connected, this server program is capable of performing commands coming from the IRC bot.

It is capabale of performing denial of service (DoS) attacks. It is also capable of gathering CD keys, serial numbers, and even application product IDs from certain software.

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

For additional information about this threat, see:

Description created: Sep. 20, 2004 2:06:11 AM GMT -0800


TECHNICAL DETAILS


Size of malware: 135,168 Bytes

Initial samples received on: Sep 20, 2004

Variant ofWORM_RBOT.A

Payload 1: Compromises system security

Payload 2: Launches DoS attacks

Payload 3: Steals CD keys, serial numbers, and application product IDs

Details:

Installation and Autostart Technique

This worm may arrive from network shares. Upon execution, it drops a copy of itself in the Windows system folder as VOLTIO.EXE.

To ensure its automatic execution at every Windows startup, it creates the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run
System Startup = "Voltio.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run
System Startup = "Voltio.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\RunServices
System Startup = "Voltio.exe"

Propagation and Exploits

This worm spreads via network shares. It uses NetBEUI functions to get available lists of user names and passwords from a system. It lists down available network shares and uses the gathered user names and passwords to access these shares and drop a copy of itself.

It also uses the following list of user names and passwords apart from those that were gathered from the system:

  • 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

This worm remotely executes every successfully dropped copy of itself as a service.

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

  • RPC/DCOM vulnerability

This vulnerability 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.

  • RPC Locator vulnerability

This allows an attacker to execute codes on a target machine by sending a malformed packet request to the Locator service. The port related to this exploit is TCP port 445.

  • IIS/WebDAV vulnerability

This vulnerability enables arbitrary codes to execute on the WebDAV server by also sending a malformed request packet. This exploit is a service related to the HTTP on port 80.

More information on these vulnerabilities can be found in the following Web pages:

When it finds a vulnerable system, it copies and executes a copy of itself on the system.

This worm may also propagate into systems with vulnerabilities that have been exploited by WORM_SASSER, WORM_BAGLE, and WORM_MYDOOM.

Backdoor Capabilities

This worm acts as a server program controlled by an Internet Relay Chat (IRC) bot. It connects to an IRC server and then joins an IRC channel.

Once connected, this server program is capable of performing the following commands from the IRC bot:

  • Capture using Web cam
  • Change IRC server
  • Delete the original server file
  • Disconnect or reconnect to the server
  • Download a file from FTP
  • Enable or disable shares
  • Execute a command line function
  • Execute a file from a Web site
  • Execute a file from an FTP
  • Execute an .EXE file
  • Flush DNS
  • Generate a new random nick
  • Join or leave an IRC channel
  • Log keystrokes
  • List all processes
  • Log on or log off a user
  • Obtain system information, such as the following:
    • CPU specifications
    • Operating system
    • RAM
  • Open a file
  • Perform a mode change
  • Sniff packet
  • Screen capture
  • Search for file
  • Send a file over DCC
  • Send a private message through IRC
  • TCP redirect
  • Terminate processes
  • Terminate the malware
  • Update the bot from a Web site
  • Update the malware from an FTP

Denial of Service Attack

This worm is capabale of performing the following denial of service (DoS) attacks:

  • HTTP flood
  • Ping flood
  • SYN flood
  • UPD flood

Information Theft

This worm is also capable of gathering CD keys, serial numbers, and even application product IDs from the following software:

  • Battlefield 1942
  • Battlefield 1942 (Road To Rome)
  • Battlefield 1942 (Secret Weapons of WWII)
  • Battlefield Vietnam
  • Black and White
  • 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)
  • 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
  • NHL 2002
  • NHL 2003
  • NOX
  • 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



Analysis by: Marc Sison


SOLUTION


Minimum scan engine version needed: 6.810

Pattern release date: Sep 20, 2004


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:

Terminating the Malware Program

This procedure terminates the running malware process.

  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 process:
    VOLTIO.EXE
  3. Select the malware process, then press either the End Task or the End Process button, depending on the version of Windows on your system.
  4. To check if the malware process has been terminated, close Task Manager, and then open it again.
  5. 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:
    System Startup = "Voltio.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:
    System Startup = "Voltio.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:
    System Startup = "Voltio.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.

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.NJ. 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 patches from the following Web pages:

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


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