Trojan.Agent/Gen.Backdoor Symptoms
- Browser (i.e. Internet Explorer, Firefox, Opera and Chrome) will not load web pages.
- Installed anti-virus programs no longer loads or runs; the attempt to run security utilities will only lead to runtime error.
- Icons of certain program disappear from system tray.
- Other error messages pop up to inform failure and hinder proper running of intended programs/services.
- Additional infections, Trojan horse particularly, will be detected soon after Trojan.Agent/Gen.Backdoor infection.
- Windows System Restore is disabled.
- Attempt to copy and paste, or drag and drop files from memory stick to hard drive is defeated by Trojan.Agent/Gen.Backdoor infection.
Trojan.Agent/Gen.Backdoor Brief Introduction
Trojan.Agent/Gen.Backdoor is classified as a backdoor Trojan that attacks backdoor programs and manages to open up a backdoor for easy downloading and uploading vicious items. As a matter of fact, many programs are written with backdoor program for the convenience of access, inspection and improvement in the future. Casually written backdoor programs will become the target of such Trojan horse. Therefore, it is wise to always stay away from suspicious ads, web applications that employ rogue methods for aggressive product promotion as well as spam sites.
Survey has been done to find out that Trojan.Agent/Gen.Backdoor provides remote, usually surreptitious, access to affected systems in an attempt to install additional Trojans or other forms of malicious software.
Trojan.Agent/Gen.Backdoor Purpose
Trojan.Agent/Gen.Backdoor attacks a machine for money of course, which well explains why cyber criminals keep creating new virus energetically. The mechanical issues listed at the beginning of this article are serving for money earning purpose. By installing additional Trojan through backdoor, a proxy Trojan may be in turn installed to relay spam or a keylogger Trojan to monitor and send keystrokes to remote attackers. Collected information will be resold to other spammers or virus makers whether it is system configuration, personal details or bank card information. Ports will be opened wide up for the transmission and possible further compromise by other attackers behind Trojan.Agent/Gen.Backdoor.
What Are The Dangers from Trojan.Agent/Gen.Backdoor?
- Sluggish PC performance.
- Additional affections.
- Disabled security service and weak protection.
- Online whereabouts and information details will be recorded and resold.
- Unsolicited access from unknown third party.
- Browser redirects and hijacks occur to result in crash.
Effective Thread to Remove Trojan.Agent/Gen.Backdoor
“I tried removing it several times and this trojan just keeps reappearing, even though SAS says that it was successfully removed:
backdoor.agent.gen in HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell
Tried to remove it manually from registry, but it returns immediately. Tried to remove in safe mode, but it just comes back after scan and ‘removal’.” – Quote
Reappearance of Trojan.Agent/Gen.Backdoor (Trojan backdoor.agent.gen) can be the major problem for victims. As a matter of fact, reappearance indicates incomplete removal. Some items are left behind without being detected due to deficient virus knowledge and computer skills. Also the reappearance can be incurred by additional infiltrations.
People should be widely informed that automatic removal will not take down Trojan.Agent/Gen.Backdoor (Trojan backdoor.agent.gen) as drivers concerning security services have been overwritten with vicious codes. In other word, the functions are disabled not to protect the affected machine any longer. Because of this, virulent codes of Trojan.Agent/Gen.Backdoor are able to be injected into system running processes for monitoring. As a consequence, the backdoor Trojan horse manages to dodge automatic removal.
Below is the effective removal thread recommended by senior technician from Global PC Support Center. Be noted that certain level of virus knowledge and computer skills are required to carry out the steps correctly and completely for a thorough removal without its re-image. Should you run into any unexpected issues in the middle of the removal and you don’t know how to overcome, please do feel free to get specialized technical help according to your concrete situation.
Effective Thread to Remove Trojan.Agent/Gen.Backdoor (Trojan backdoor.agent.gen)
1) please close down System Restore function as Trojan.Agent/Gen.Backdoor could inject its vicious code into every detected restore points and restore itself automatically after being remove incompletely.
2) enter into Safe Mode to run full scan with anti-virus program and note down the path name directing to Trojan.Agent/Gen.Backdoor.
Windows 7/Vista/XP
Restart the affected computer > keep tapping on “F8 key” when the computer is booting > select ‘Safe Mode’ on “Windows Advanced Options Menu” screen > press Enter key.
Windows 8
Restart the affected computer > hold the Shift button and keep tapping on the F8 key as the computer is booting > ‘See advanced repair options’ > ‘Troubleshoot’ > ‘Advanced Options’ > ‘Windows Startup Settings’ > ‘Restart’ button.
3) end the running processes related to Trojan.Agent/Gen.Backdoor according to the path name shown in Task Manager and System Information respectively.
Access Task Manager > View > select columns > tick "PID" and "Path name" > go to open up System Information > end the process with path name directing to Trojan.Agent/Gen.Backdoor 's path or the path that doesn't belong to system.
(tip: find the services directing to Trojan.Agent/Gen.Backdoor 's path or the path that doesn't belong to system for step 5)
4) unveil all hidden items and remove items generated by Trojan.Agent/Gen.Backdoor from local disk.
Windows 7/XP/Vista- Control Panel > user accounts and family safety > Folder Options > View tab > tick ‘Show hidden files and folders’ > non-tick ‘Hide protected operating system files (Recommended)’ > OK button.
Windows 8 - Windows Explorer > View tab > tick ‘File name extensions’ and ‘Hidden items’ > OK button.
Access the detected path and remove all the items there.
Access C:\Windows, C:\Windows\System32, C:\windows\winstart.bat, C:\windows\wininit.ini and C:\windows\Autoexec.bat to remove all the files and folders detected on the date when Trojan.Agent/Gen.Backdoor was firstly found.
5) access Database to remove the items generated by Trojan.Agent/Gen.Backdoor.
- Press down Win key and R key together > type “regedit” > hit Enter key > remove the values under the following entries:
HKEY_CLASSES_ROOTWindowFiles\Check_Associations
HKEY_LOCAL_MACHINESOFTWAREClientsStartMenuInternetINTEXPLORE.pif\ToP
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun\[random numbers and letters]
HKEY_CLASSES_ROOTCLSID{random numbers} shellOpenHomePageCommand. HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell
- Next use Ctrl+F key combination to put in the suspicious service detected in step 3 > hit Find button > end the services in Database.
The items generated by Trojan.Agent/Gen.Backdoor vary from one another on different OS (operating system). Therefore it is impossible to list out all the items associated with the Trojan horse and this is why virus knowledge and computer skills are required to carry out the removal thread. If you encounter difficulty in telling which are genuine and which are not in the middle of the removal, it is recommended to consult senior technicians to prevent any mistake that could lead to more unnecessary problems. It needs to be stressed that the above removal thread is exclusively applicable to Trojan.Agent/Gen.Backdoor (Trojan backdoor.agent.gen). To find solutions to other incurred infections, please browse to virus reservoir.
Reference:
Backdoor Program – Wikipedia
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