Malware type: Worm

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:


Distribution potential:



This worm spreads via network shares. It copies itself to the default shared folders of accessible machines. It also uses a predefined list of user names and passwords to gain entry to remote systems.

This worm takes advantage of the following Windows vulnerabilities:

  • Remote Procedure Call (RPC) Distributed Component Object Model (DCOM) vulnerability
  • Windows LSASS vulnerability

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

It has backdoor capabilities. Using a random TCP port, it may execute remote commands on the host machine. The said remote commands may include file execution, information theft, and ping attacks against remote machines. This worm steals the CD keys of certains applications, as well as the Windows Product ID.

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

For additional information about this threat, see:

Description created: Oct. 27, 2004 10:41:32 AM GMT -0800
Description updated: Oct. 27, 2004 11:21:29 AM GMT -0800


Size of malware: 89,600 Bytes

Initial samples received on: Oct 27, 2004

Payload 1: Compromises system security


Installation and Autostart

Upon execution, this memory-resident worm drops a copy of itself in the Windows system folder using the following file name:


This worm creates several threads, which it uses for its sniffing, keylogging, and other backdoor capabilities.

It also turns the infected system a TFTP (Trivial File Transfer Protocol) server that attempts to send a copy of itself to other systems as BLING.EXE.

It creates the following registry entries, which enable it to run automatically at every system startup:

Microsoft Update= "Micr0s0ft.exe"

Microsoft Update= "Micr0s0ft.exe"

HKEY_CURRENT_USER\Software\Microsoft\Ole Microsoft Update= "Micr0s0ft.exe"

Network Propagation

This worm spreads via network shares. It copies itself to the following shared folders of accessible machines:

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

It also uses a predefined list of user names and passwords to gain entry to remote systems, as follows:

    User names:

  • access
  • accounting
  • accounts
  • asd
  • backup
  • bill
  • bitch
  • blank
  • bob
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • control
  • data
  • databasepass
  • databasepassword
  • db1
  • db1234
  • dbpass
  • dbpassword
  • dell
  • demo
  • domain
  • domainpass
  • domainpassword
  • eric
  • exchange
  • fred
  • fuck
  • george
  • god
  • hell
  • hello
  • home
  • homeuser
  • ian
  • ibm
  • internet
  • intranet
  • jen
  • joe
  • john
  • kate
  • katie
  • lan
  • lee
  • linux
  • loginpass
  • luke
  • mail
  • main
  • mary
  • mike
  • neil
  • nokia
  • none
  • null
  • oem
  • oeminstall
  • oemuser
  • office
  • orainstall
  • outlook
  • peter
  • qaz
  • qwe
  • qwerty
  • sam
  • sex
  • siemens
  • slut
  • sql
  • sqlpassoainstall
  • sue
  • susan
  • technical
  • unix
  • web
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp
  • www
  • zxc


  • 007
  • 123
  • 1234
  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • 2000
  • 2001
  • 2002
  • 2003
  • 2004
  • adm
  • administrador
  • administrat
  • administrateur
  • admins
  • computer
  • database
  • db2
  • dba
  • default
  • guest
  • oracle
  • owner
  • pass
  • pass1234
  • passwd
  • password1
  • pwd
  • staff
  • student
  • teacher
  • wwwadmin

Backdoor Capabilities

This worm also has backdoor capabilities. It connects to a remote IRC (Internet Relay Chat) server and joins a specific IRC channel where it receives commands coming from a remote malicious user. The remote malicious user may then perform the following commands on the infected system:

  • Update malware from HTTP and FTP URL
  • Execute a file
  • Download from HTTP and FTP URL
  • Open a command shell
  • Open files
  • Display the driver list
  • Get screen capture
  • Capture pictures and video clips
  • Display NETINFO
  • Make a bot join a channel
  • Stop and start a thread
  • List all running processes
  • Rename a file
  • Generate a random nickname
  • Perform different kinds of DDoS attacks
  • Retrieve and clear log files
  • Terminate the bot
  • Disconnect the bot from IRC
  • Send a message to the IRC server
  • Allow bot to perform mode change
  • Change BOT ID
  • Display connection type, local IP address, and other net information
  • Log on and log off the user
  • Issue PING attack on to a target computer
  • Display system information, as follows:
    • CPU speed
    • Amount of memory
    • Windows platform, build version, and product ID
    • Malware uptime
    • User name

Windows Exploits

Aside from its backdoor capabilities, this worm takes advantage of the Remote Procedure Call (RPC) Distributed Component Object Model (DCOM) vulnerability present on Windows systems, which allows an attacker to gain full access and execute any code on a target machine, leaving it compromised.

Read more on this vulnerability from the following link:

This worm also exploits the Windows LSASS vulnerability. This vulnerability is a buffer overrun that allows remote code execution. Detailed information about this vulnerability is available from the following Microsoft page:

Denial of Service

This worm performs a denial of service (DoS) attack by performing the following flood methods against target IP addresses:

  • HTTP
  • ICMP
  • SYN
  • UDP

Information Theft

This worm uses a network sniffer called Carnivore, and checks for the following text strings:

  • : auth
  • : login
  • :!auth
  • :!hashin
  • :!login
  • :!secure
  • :!syn
  • :$auth
  • :$hashin
  • :$login
  • :$syn
  • :%auth
  • :%hashin
  • :%login
  • :%syn
  • :&auth
  • :&login
  • :*auth
  • :*login
  • :,auth
  • :,login
  • :.auth
  • :.hashin
  • :.login
  • :.secure
  • :.syn
  • :/auth
  • :/login
  • :?auth
  • :?login
  • :@auth
  • :@login
  • :\auth
  • :\login
  • :~auth
  • :~login
  • :%20auth
  • :%20login
  • :=auth
  • :=login
  • :'auth
  • :-auth
  • :'login
  • :-login
  • login
  • login
  • paypal
  • paypal.com

This worm steals the CD keys of the following applications:

  • 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
  • NHL 2002
  • NHL 2003
  • NOX
  • Nascar Racing 2002
  • Nascar Racing 2003
  • Need For Speed Hot Pursuit 2
  • Need For Speed: Underground
  • Neverwinter Nights (Hordes of the Underdark)
  • Neverwinter Nights (Shadows of Undrentide)
  • 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

It also steals the Windows OS Product ID. The remote malicious user may also issue commands so that its bot is able to log keystrokes.

Other Details

This worm is compressed using PECompact2.

Analysis by: Elmer M. Ubalde


Minimum scan engine version needed: 6.810

Pattern file needed: 2.221.01

Pattern release date: Oct 27, 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.


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_AGOBOT.AAR.

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
    � 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:
  3. In the right panel, locate and delete the entry:
    Microsoft Update= "Micr0s0ft.exe"
  4. In the left panel, double-click the following:
  5. In the right panel, locate and delete the entry:
    Microsoft Update= "Micr0s0ft.exe"
  6. In the left panel, double-click the following:
  7. In the right panel, locate and delete the entry:
    Microsoft Update= "Micr0s0ft.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_AGOBOT.AAR. 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 worm exploits known vulnerabilities in Windows. Download and install the fix patches supplied by Microsoft in the following pages:

Refrain from using this product until the appropriate patch has been installed. 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.