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For remove W32.Harakit virus,please clean/delete all W32.Harakit infected files and Delete/Modify any values W32.Harakit added to the registry as following:
Once executed, the worm may create the following files:
- %SystemDrive%\khq
- %SystemDrive%\khr
- %System%\cftm.exe
- %System%\cftmen.exe
It will copy itself to the following location and then deletes itself:
%System%\csrcs.exe
The worm also creates the following file on all removable drives so that it executes whenever the drive is accessed:
%System%\autorun.inf
The worm creates the following registry entries, so that it runs every time Windows starts:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run\"cftm" = "C:\WINDOWS\system32\cftm.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run\"csrcs" = "C:\WINDOWS\system32\csrcs.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"cftm" = "C:\WINDOWS\system32\cftm.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices\"cftm" = "C:\WINDOWS\system32\cftm.exe"
The worm creates the following registry entry so that it hides itself and runs when Windows starts:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\"ShowSuperHidden" = "0"
It also modifies the following existing registry value, so that it runs every time Windows starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Shell" = "Explorer.exe csrcs.exe"
It may also create and populate the following registry keys
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DRM
- HKEY_LOCAL_MACHINE\SOFTWARE\ESET\Nod
The worm may delete the following registry entries:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoDriveTypeAutoRun" = "B5"
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoDriveAutoRun" = "FF FF FF 03"
It may also delete registry entries present in the following registry subkeys to lower security settings:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\NonEnum
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
The worm spreads through network shares, removable devices or instant messaging applications.
It has back door capabilities and may connect to a predetermined IRC channel allowing unauthorized access to perform the following actions:
- Gathering confidential information
- Act as a bot through IRC servers
- Download extensions and updates of itself
It may attempt to contact any of the following URLs:
- akitaka.oct382x.com/lexum/genst.htm
- checkip.dyndns.org/?rndl
- diesam.moe.hm/ii/133.php
- geoloc.daiguo.com
- lemox.myhome.cx
- oct382x.com/4.exe
- oct382x.com/4.php
- oct382x.com/lexum/genste.htm
- sousi/extasix.com/genst.htm
- tonkor.or.tp/llkah.htm
- tonkor.or.tp/worlog1.php
- tonkor.or.tp/worlog2.php
- tonkor.or.tp/worlog3.php
- tonkor.or.tp/worlog4.php
- tonkor.or.tp/worlog5.php
- tonkor.or.tp/worlog6.php
- www.whatismyip.com/?rndl
- www.whatismyip.com/automation/n09230945.asp
- zkarmy.dip.jp/oolksh.htm
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.
For successful remove W32.Harakit 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 W32.Harakit temp file exisit there.
4.If you failed to remove W32.Harakit,please go to our remove help forum:http://help.antiviruses123.com
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