WORM_RBOT.AEE

Malware type: Worm

Aliases: New Malware.u !!, W32.Spybot.Worm, Worm/Rbot.141824.17, Mal/Packer, Backdoor:Win32/Rbot!0EF9

In the wild: Yes

Destructive: No

Language: English

Platform: Windows NT, 2000, XP

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This memory-resident worm arrives and propagates through network shares. Upon execution, it drops a copy of itself as the file WAUGUARD.EXE in the Windows system folder. It may attempt to use its own list of user names and passwords to gain access and further propagate onto other shared folders.

It also propagates by taking advantage of the following Windows vulnerabilities:

  • RPC DCOM buffer overflow vulnerability
  • LSASS buffer overrun vulnerability

For more information regarding these vulnerabilities, please refer to the following Microsoft Web pages:

It also has backdoor capabilities. It comes with a built-in Internet Relay Chat (IRC) bot which allows it to connect to an IRC server. It then waits for commands from a remote user. Once connected, the remote user gains virtual control of the affected system.

It runs on Windows NT, 2000, and XP.

For additional information about this threat, see:

Description created: Nov. 16, 2004 4:20:24 PM GMT -0800


TECHNICAL DETAILS


Size of malware: 103,424 Bytes

Initial samples received on: Nov 16, 2004

Payload 1: Compromises network security

Payload 2: Steals CD keys

Details:

Installation and Autostart Techniques

This worm arrives and propagates through network shares. Upon execution, it drops a copy of itself as the file WAUGUARD.EXE in the Windows system folder.

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

HKEY_CURRENT_USER\Software\Microsoft\OLE
Microsoft Update = "WAUGUARD.EXE"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Run
Microsoft Update = "WAUGUARD.EXE"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\RunServices
Microsoft Update = "WAUGUARD.EXE"

Upon execution of the dropped copy, it registers itself as a service.

Propagation via Network Shares

This worm propagates by copying itself into the shared folders of other systems. It may attempt to use the following list of user names and passwords to gain access and further propagate onto other shared folders in the network:

  • 007
  • 123
  • 1234
  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • 2000
  • 2001
  • 2002
  • 2003
  • 2004
  • access
  • accounting
  • accounts
  • adm
  • administrador
  • administrat
  • administrateur
  • administrator
  • admins
  • asd
  • backup
  • bill
  • bitch
  • blank
  • bob
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • computer
  • control
  • data
  • database
  • databasepass
  • databasepassword
  • db1
  • db1234
  • db2
  • dba
  • dbpass
  • dbpassword
  • default
  • dell
  • demo
  • domain
  • domainpass
  • domainpassword
  • eric
  • exchange
  • fred
  • fuck
  • george
  • god
  • guest
  • hell
  • hello
  • home
  • homeuser
  • ian
  • ibm
  • internet
  • intranet
  • jen
  • joe
  • john
  • kate
  • katie
  • lan
  • lee
  • linux
  • login
  • loginpass
  • luke
  • mail
  • main
  • mary
  • mike
  • neil
  • nokia
  • none
  • null
  • oem
  • oeminstall
  • oemuser
  • office
  • oracle
  • orainstall
  • outlook
  • owner
  • pass
  • pass1234
  • passwd
  • password
  • password1
  • peter
  • pwd
  • qaz
  • qwe
  • qwerty
  • sam
  • server
  • sex
  • siemens
  • slut
  • sql
  • sqlpassoainstall
  • staff
  • student
  • sue
  • susan
  • system
  • teacher
  • technical
  • test
  • unix
  • user
  • web
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp
  • www
  • wwwadmin
  • zxc

Once login is successful, it drops and executes a copy of itself in the following shared folders:

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

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 pages:

Backdoor Routine

This worm also has backdoor capabilities. It comes with a built-in Internet Relay Chat (IRC) bot which allows it to connect to the IRC server irc2.rocksonte.com. It then waits for commands from a remote user. Once connected, the remote user gains virtual control of the affected system. The remote user can then execute the following malicious actions:

  • Monitor URL visited by user
  • Port scanning
  • Retrieve CD keys of popular PC games
  • Retrieves system data such as available memory and CPU speed
  • Update the malware copy
  • Visit Web sites





Analysis by: Arman Catacutan

Revision History:

First pattern file version: 2.250.08
First pattern file release date: Nov 16, 2004

SOLUTION


Minimum scan engine version needed: 7.500

Pattern file needed: 3.568.02

Pattern release date: Jul 13, 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:

AUTOMATIC REMOVAL INSTRUCTIONS

To automatically remove this malware from your system, please use Trend Micro Damage Cleanup Services.

MANUAL REMOVAL INSTRUCTIONS

Terminating the Malware Program

This procedure terminates the running malware process.

  1. Open Windows Task Manager.
    � 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:
    WAUGUARD.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.

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:
    Microsoft Update = "WAUGUARD.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:
    Microsoft Update = "WAUGUARD.EXE"
  6. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>OLE
  7. In the right panel, locate and delete the entry:
    Microsoft Update = "WAUGUARD.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 XP Cleaning Instructions

Users running Windows 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.AEE. 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.