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For remove Trojan.Donbot virus,please clean/delete all Trojan.Donbot infected files and Delete/Modify any values Trojan.Donbot added to the registry as following:
When the Trojan executes, it creates the following files:
- %System%\sysmgr.exe
- %System%\msvcrt2.dll
Next, it creates the following registry entry so that it executes whenever Windows starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"Microsoft(R) System Manager" = "%System%\sysmgr.exe"
It also creates the following registry entries:
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\"TcpTimedWaitDelay" = "0x0000001E"
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\"MaxUserPort" = "0x00008000"
The Trojan attempts to contact certain IP addresses, which may include one the following:
- don.hmarhelo.com on TCP port 2251
- 89.149.244.22 on TCP port 2211
- 212.95.32.171 on TCP port 2351
- 66.186.34.98 on TCP port 2485
It may then create a unique session in order to perform the following tasks:
- Download an updated copy of itself
- Download configuration data that contains email addresses and contents for the spammed emails
The Trojan then attempts to send spam emails with the following characteristics from the compromised computer:
Message Body:
In Order To Place Your Order:
Phentermine 37.5
Vicodin
Ambien
Anything you need without doctor's note and overnighted!
To find these and more navigate to this address:
[URL]
Note: [URL] above denotes a URL on one of the following domains:
- [http://]approachtouchedminute200917.com
- [http://]showopenblockes2009.com
- [http://]approachmysteriousminute.com
- [http://]approach-beautiful-human.com
- [http://]showtidyurbanes-area2009.com
- [http://]show-well-behaved-country.com
- [http://]guide-well-behaved-lane.com
- [http://]revealtidyurban-area20090107.com
- [http://]feeling-coming-creatures.com
- [http://]approach-hopeful-minute0917.com
RecommendationsSymantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":
- Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
- Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
- Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
- Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
- Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
- Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
- If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
- Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
- Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
- Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
- Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
- If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
- For further information on the terms used in this document, please refer to the Security Response glossary.
For successful remove Trojan.Donbot virus,you may also need do as following:
1. Temporarily Disable System Restore .
2. Update the virus definitions. Reboot computer in SafeMode;
3. Delete the IE temp files,some Trojan.Donbot temp file exisit there.
4.If you failed to remove Trojan.Donbot,please go to our remove help forum:http://help.antiviruses123.com
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