Upon execution, this memory-resident worm drops a copy of itself as the file DLLSRV32.EXE in the Windows system folder.
This worm spreads via network shares and Internet Relay Chat (IRC).
It terminates several processes, most of which are related to antivirus software and tools.
It also deletes several antivirus and firewall-related registry entry values.
This worm has backdoor capabilities. It acts as a server program controlled by an IRC bot.
Once connected, this IRC bot is capable of sending commands to the server program. These commands are used to control the target system and the behavior of the bot.
The worm runs on Windows 95, 98, ME, NT, 2000, and XP.
For additional information about this threat, see:
Description created:Jan. 14, 2005 8:49:42 AM GMT -0800Description updated:Jan. 14, 2005 9:30:33 AM GMT -0800
This worm opens port 6667 and acts as a server program controlled by an Internet Relay Chat (IRC) bot.
This worm has backdoor capabilities. It acts as a server program controlled by an IRC bot.
Once connected, this IRC bot is capable of sending commands to the server program. These commands are used to control the target system and the behavior of the bot. These commands are basically categorized as the Bot, Command Manager, Cvar, IRC, Mac, Redirect, and Download commands.
Other Details
It adds the following registry entries to check for updates:
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.
Scan your system with your Trend Micro antivirus product.
NOTE all files detected as WORM_AGOBOT.AEW.
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.
Open Windows Task Manager. � On Windows NT, 2000, and XP, press
CTRL%20SHIFT%20ESC, then click the Processes tab.
In the list of running programs*, locate the malware file(s) detected earlier.
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.
Do the same for all detected malware files in the list of running processes.
To check if the malware process has been terminated, close Task Manager, and then open it again.
Close Task Manager.
Removing Autostart Entries from the Registry
Removing autostart entries from the registry prevents the malware from executing at startup.
Click Start>Run.
In the Open input box, type: command /c copy %WinDir%\regedit.exe regedit.com | regedit.com
Press Enter. Registry Editor should open.
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>Software>Microsoft>
Windows>CurrentVersion>Run
In the right panel, locate and delete the entry: RegScan = "DLLSRV32.EXE -services"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>Software>Microsoft>
Windows>CurrentVersion>RunServices
In the right panel, locate and delete the entry: RegScan = "DLLSRV32.EXE -services"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>
Windows>CurrentVersion>Run
In the right panel, locate and delete the entry: RegScan = "DLLSRV32.EXE -services"
Addressing Registry Modifications
Still in the Registry Editor, in the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>
CurrentVersion>Policies>Explorer>DisallowRun
In the right panel, locate and delete the entry or entries that contain(s) the following data:
� blackd.exe
� blackice.exe
� lockdown.exe
� lockdown2000.exe
� netmon.exe
� processmonitor.exe
� taskkill.exe
� tskill.exe
� smc.exe
� sniffem.exe
� zapro.exe
� zlclient.exe
� zonealarm.exe
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>Software>Microsoft>
Still in the left panel, locate and delete: Connect
Close Registry Editor.
Click Start>Run, then type: command /c del regedit.com
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.
Running Trend Micro Antivirus
Scan your system with Trend Micro antivirus and delete all files detected as WORM_AGOBOT.AEW. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other users can use HouseCall, Trend Micro�s free online virus scanner.
