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Hari ini salah satu PC di kantor terserang Backdoor.IRC.Aladinz.K virus ini masuk dalam kategori trojan horse dan mempunyai risk level low. Meski tidak terlalu berbahaya namun trojan ini dapat melakukan disabling terhadap beberapa servis di windows. Saat memeriksa PC servis yang telah didisable oleh trojan ini adalah symantec antivirus dan juga msconfig.
Symantec Security Response http://www.symantec.com/security_response/index.jsp Backdoor.IRC.Aladinz.K Risk Level 1: Very Low Discovered: February 19, 2004 Updated: February 13, 2007 12:17:45 PM Type: Trojan Horse Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows XP SUMMARYBackdoor.IRC.Aladinz.K is a backdoor Trojan horse that uses malicious scripts in the mIRC client software, allowing unauthorized remote access. Protection - Initial Rapid Release version February 19, 2004
- Latest Rapid Release version July 19, 2008 revision 019
- Initial Daily Certified version February 19, 2004
- Latest Daily Certified version July 19, 2008 revision 018
- Initial Weekly Certified release date February 25, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions. Threat Assessment Wild - Wild Level: Low
- Number of Infections: 0 - 49
- Number of Sites: 0 - 2
- Geographical Distribution: Low
- Threat Containment: Easy
- Removal: Moderate
Damage Distribution TECHNICAL DETAILSWhen Backdoor.IRC.Aladinz.K is executed, it performs the following actions: - Creates the following files:
- C:\upd.exe (detected as Backdoor.IRC.Aladinz.K)
- C:\inst.bat
- C:\pv.exe
- C:\restore.exe (detected as Hacktool.HideWindow)
- Runs the file, C:\upd.exe, which creates the following folders:
- %Windir%\System32\plugins
- %Windir%\System32\plugins\dat
- %Windir%\System32\plugins\downloads
- %Windir%\System32\plugins\log
- %Windir%\System32\plugins\logs
- %Windir%\System32\plugins\plugins
- %Windir%\System32\plugins\sounds
and the following files:
- %Windir%\System32\plugins\dat\config.ini
- %Windir%\System32\plugins\dat\easy_user.dic
- %Windir%\System32\plugins\dat\language.ini
- %Windir%\System32\plugins\dat\nt_pass.dic
- %Windir%\System32\plugins\dat\nt_user.dic
- %Windir%\System32\plugins\dat\os.finger
- %Windir%\System32\plugins\dat\port.ini
- %Windir%\System32\plugins\dat\rpc.ini
- %Windir%\System32\plugins\plugin\010-port.xpn (detected as Hacktool.Xscan)
- %Windir%\System32\plugins\plugin\020-netbios.xpn (detected as Hacktool.Xscan)
- %Windir%\System32\plugins\plugin\030-rpc.xpn (detected as Hacktool.Xscan)
- %Windir%\System32\plugins\plugin\090-ntpass.xpn (detected as Hacktool.Xscan)
- %Windir%\System32\plugins\addreg.bat
- %Windir%\System32\plugins\addreg.reg (detected as Backdoor.Trojan)
- %Windir%\System32\plugins\addregnt.reg
- %Windir%\System32\plugins\addregxp.reg
- %Windir%\System32\plugins\avupd.exe
- %Windir%\System32\plugins\background.jpg
- %Windir%\System32\plugins\dd9a.wav
- %Windir%\System32\plugins\delroot.bat
- %Windir%\System32\plugins\delscans.bat
- %Windir%\System32\plugins\get.exe
- %Windir%\System32\plugins\icon.jpg
- %Windir%\System32\plugins\init.bat (detected as Backdoor.IRC.Aladinz.K)
- %Windir%\System32\plugins\onrpc.dll
- %Windir%\System32\plugins\parse.txt
- %Windir%\System32\plugins\preset.ini (detected as Backdoor.IRC.Aladinz.K)
- %Windir%\System32\plugins\psexec.exe
- %Windir%\System32\plugins\random.txt
- %Windir%\System32\plugins\Rar.exe
- %Windir%\System32\plugins\remote.ini
- %Windir%\System32\plugins\remove.exe
- %Windir%\System32\plugins\restart.bat
- %Windir%\System32\plugins\restore.exe (detected as Hacktool.HideWindow)
- %Windir%\System32\plugins\spool.exe
- %Windir%\System32\plugins\svhost.exe (detected as Hacktool.Xscan)
- %Windir%\System32\plugins\test.ini (detected as Backdoor.IRC.Aladinz.K)
- %Windir%\System32\plugins\upd.bat (detected as Backdoor.IRC.Aladinz.K)
- %Windir%\System32\plugins\X-ScanCfg.ini
- Deletes all the values in the registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
Run
which prevents programs that use this key from starting when Windows starts.
- Adds the value:
"PrinterSpool"="%System%\PLUGINS\RESTORE.EXE %System%\PLUGINS\
SPOOL.EXE"
to the registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
Run
so that the Trojan runs when you start Windows.
- Sets the values to zero as shown here:
"AutoShareWks"=0
"AutoShareServer"=0
in the registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
lanmanserver\parameters
so that the administrative shares of the computer are disabled.
- Adds the subkey:
HKEY_CURRENT_USER\Software\mIRC\UserName
and sets the value to:
"(Default)"="mirc6"
- Adds the subkey:
HKEY_CURRENT_USER\Software\mIRC\License
and sets the value:
"(Default)"="1413-156222"
- Adds the subkey:
HKEY_CURRENT_USER\Software\mIRC\LastRun
and sets the value to:
"(Default)"="1072676713,0"
- Attempts to overwrite the following configuration files:
- C:\Program Files\nav\CfgWiz.dat
- C:\Program Files\nav\exclude.dat
- C:\Program Files\nav\navopts.dat
- C:\Program Files\nav\savrt.dat
- C:\Program Files\nav\srtsexcl.dat
- C:\Program Files\Norton AntiVirus\CfgWiz.dat
- C:\Program Files\Norton AntiVirus\exclude.dat
- C:\Program Files\Norton AntiVirus\navopts.dat
- C:\Program Files\Norton AntiVirus\savrt.dat
- C:\Program Files\Norton AntiVirus\srtsexcl.dat
- C:\Program Files\Norton SystemWorks\Norton AntiVirus\CfgWiz.dat
- C:\Program Files\Norton SystemWorks\Norton AntiVirus\exclude.dat
- C:\Program Files\Norton SystemWorks\Norton AntiVirus\navopts.dat
- C:\Program Files\Norton SystemWorks\Norton AntiVirus\savrt.dat
- C:\Program Files\Norton SystemWorks\Norton AntiVirus\srtsexcl.dat
which may modify certain settings in Norton AntiVirus. In particular, it may cause the following folders to be excluded from virus scanning:
- C:\Windows\System32
- C:\Winnt\System32
- D:\Windows\System32
- D:\Winnt\System32
- Allows a remote attacker to control the computer. The functions provided include:
- Retrieving information about the computer.
- Stopping and restarting the Trojan.
- Downloading and running files.
- Scanning hosts for vulnerabilities using the X-Scan network vulnerability scanner.
RecommendationsSymantec Security Response encourages all users and administrators to adhere to the following basic security "best practices": - Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.
- If a blended 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 (for example, all Windows-based computers should have the current Service Pack installed.). Additionally, please apply any security updates that are mentioned in this writeup, in trusted Security Bulletins, or on vendor Web sites.
- 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.
- Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.
- Isolate infected computers quickly to prevent further compromising your organization. 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.
REMOVAL
The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
- Disable System Restore (Windows Me/XP).
- Update the virus definitions.
- Delete the values that were added to the registry.
- Uninstall and re-install Norton AntiVirus.
- Run a full system scan and delete all the files detected as Backdoor.IRC.Aladinz.K.
For specific details on each of these steps, read the following instructions.
1. Disabling System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.
Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.
Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.
For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, re-enable System Restore by following the instructions in the aforementioned documents.
For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article, "Antivirus Tools Cannot Clean Infected Files in the _Restore Folder," Article ID: Q263455.
2. Updating the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions: - Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
- Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).
The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.
3. Deleting the values from the registry
WARNING: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified keys only. Read the document, "How to make a backup of the Windows registry," for instructions.
- Click Start, and then click Run. (The Run dialog box appears.)
- Type regedit
Then click OK. (The Registry Editor opens.)
- Navigate to the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- In the right pane, delete the value:
"PrinterSpool"="%System%\PLUGINS\RESTORE.EXE %System%\PLUGINS\SPOOL.EXE"
- Navigate to the key:
HKEY_CURRENT_USER\Software\mIRC
Note: If you do not use mIRC, you can delete this key and go to step i. If you use mIRC, complete steps f through h.
- Navigate to the key:
HKEY_CURRENT_USER\Software\mIRC\UserName
and reset the value:
"(Default)"
to the correct value.
- Navigate to the key:
HKEY_CURRENT_USER\Software\mIRC\License
and reset the value:
"(Default)"
to the correct value.
- Navigate to the key:
HKEY_CURRENT_USER\Software\mIRC\LastRun
and reset the value:
"(Default)"
to the correct value.
- Exit the Registry Editor.
4. Uninstalling and re-installing Norton AntiVirus
Since Backoor.IRC.Aladinz.K attempts to modify certain Norton AntiVirus files, you will need to uninstall and re-install Norton AntiVirus to completely remove this Trojan. For instructions, read the following document relevant to your version of Norton AntiVirus:
5. Scanning for and deleting the infected files - Start your Symantec antivirus program and make sure that it is configured to scan all the files.
- Run a full system scan.
- If any files are detected as Backdoor.IRC.Aladinz.K, Backdoor.Trojan, Hacktool.HideWindow, or Hacktool.X-Scan, click Delete.
Symantec Security Response also recommends that you also delete all the other files that Backdoor.IRC.Aladinz.K dropped, as described in steps 1 and 2 of the "Technical Details" section.
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