W32/Agobot-AAG

Please follow the instructions for removing worms.

Change any data that may have become compromised.

Replace the Hosts file from a backup or edit it in Notepad to remove the changes that the worm has made.

You will also need to edit the following registry entries, if they are present. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices

and remove any reference to any file you deleted.

Close the registry editor.

W32/Agobot-AAG is an internet worm and IRC backdoor Trojan for the Windows platform.

W32/Agobot-AAG spreads to other network computers by exploiting the buffer overflow vulnerabilites LSASS (MS04-011) and RPC-DCOM (MS04-012) and by copying itself to network shares protected by weak passwords.

W32/Agobot-AAG runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

The following patches for the operating system vulnerabilities exploited by W32/Agobot-AAG can be obtained from the Microsoft website:

MS04-011
MS04-012 W32/Agobot-AAG is an internet worm and IRC backdoor Trojan for the Windows platform.

W32/Agobot-AAG spreads to other network computers by exploiting the buffer overflow vulnerabilites LSASS (MS04-011) and RPC-DCOM (MS04-012) and by copying itself to network shares protected by weak passwords.

W32/Agobot-AAG runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

W32/Agobot-AAG includes functionality to:

- steal confidential information
- carry out DDoS flooder attacks
- silently download, install and run new software
- disable anti-virus and security related applications

When first run W32/Agobot-AAG moves itself to <System>\wmp9.exe and creates the following registry entries to ensure it is run at system logon:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Nero Updater.6.12
wmp9.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Nero Updater.6.12
wmp9.exe

W32/Agobot-AAG modifies the HOSTS file, changing the URL-to-IP mappings for selected websites, therefore preventing normal access to these sites. The new HOSTS file will typically contain the following:

127.0.0.1 www.symantec.com
127.0.0.1 securityresponse.symantec.com
127.0.0.1 symantec.com
127.0.0.1 www.sophos.com
127.0.0.1 sophos.com
127.0.0.1 www.mcafee.com
127.0.0.1 mcafee.com
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 www.viruslist.com
127.0.0.1 viruslist.com
127.0.0.1 viruslist.com
127.0.0.1 f-secure.com
127.0.0.1 www.f-secure.com
127.0.0.1 kaspersky.com
127.0.0.1 www.avp.com
127.0.0.1 www.kaspersky.com
127.0.0.1 avp.com
127.0.0.1 www.networkassociates.com
127.0.0.1 networkassociates.com
127.0.0.1 www.ca.com
127.0.0.1 ca.com
127.0.0.1 mast.mcafee.com
127.0.0.1 my-etrust.com
127.0.0.1 www.my-etrust.com
127.0.0.1 download.mcafee.com
127.0.0.1 dispatch.mcafee.com
127.0.0.1 secure.nai.com
127.0.0.1 nai.com
127.0.0.1 www.nai.com
127.0.0.1 update.symantec.com
127.0.0.1 updates.symantec.com
127.0.0.1 us.mcafee.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 customer.symantec.com
127.0.0.1 rads.mcafee.com
127.0.0.1 trendmicro.com
127.0.0.1 www.trendmicro.com

The following patches for the operating system vulnerabilities exploited by W32/Agobot-AAG can be obtained from the Microsoft website:

MS04-011
MS04-012