Removing Win32 Kido.ih, kido.dv and kido.fx net worm

Removing Win32 Kido.ih, kido.dv and kido.fx net worm
Technical details

This network worm spreads via local networks and removable storage media. The program itself is a Windows PE DLL file. The worm components vary in size from 155KB to 165KB. It is packed using UPX.

Installation
The worm copies its executable file with random names as shown below:

%System%\dir.dll
%Program Files%\Internet Explorer\.dll
%Program Files%\Movie Maker\.dll
%All Users Application Data%\.dll
%Temp%\.dll
%System%\tmp
%Temp%\.tmp
is a random string of symbols.

In order to ensure that the worm is launched next time the system is started, it creates a system service which launches the worm’s executable file each time Windows is booted. The following registry key will be created:

[HKLM\SYSTEM\CurrentControlSet\Services\netsvcs]
The worm also modifies the following system registry key value:

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost]
"netsvcs" = " %System%\.dll"
Propagation
The worm then launches an HTTP server on a random TCP port; this is then used to download the worm's executable file to other computers.

The worm gets the IP addresses of computers in the same network as the victim machine and attacks them via a buffer overrun vulnerability (MS08-067) in the Server service. The worm sends a specially crafted RPC request to remote machines. This causes a buffer overrun when the wcscpy_s function is called in netapi32.dll; this launches code that downloads the worm's executable file to the victim machine and launches it. The worm is then installed on the new victim machine.

In order to exploit the vulnerability described above, the worm attempts to connect to the Administrator account on the remote machine. The worm uses the passwords shown below to brute force the account:
99999999 9999999 999999 99999 88888888 8888888 888888 88888 8888 888 88 8 77777777 7777777 777777 77777 7777 777 77 7 66666666 6666666 666666 66666 6666 666 66 6 55555555 5555555 555555 55555 5555 555 55 5 44444444 4444444 444444 44444 4444 444 44 4 33333333 3333333 333333 33333 3333 333 33 3 22222222 2222222 222222 22222 2222 222 22 2 11111111 1111111 111111 11111 1111 111 explorer exchange customer cluster nobody codeword codename changeme desktop security secure public system shadow office supervisor superuser share super secret server computer owner backup database lotus oracle business manager temporary ihavenopass nothing nopassword nopass Internet internet example sample love123 boss123 work123 home123 mypc123 temp123 test123 qwe123 abc123 pw123 root123 pass123 pass12 pass1 admin123 admin12 admin1 password123 password12 password1 9999 999 99 9 11 1 00000000 0000000 00000 0000 000 00 0987654321 987654321 87654321 7654321 654321 54321 4321 321 21 12 fuck zzzzz zzzz zzz xxxxx xxxx xxx qqqqq qqqq qqq aaaaa aaaa aaa sql file web foo job home work intranet controller killer games private market coffee cookie forever freedom student account academia files windows monitor unknown anything letitbe letmein domain access money campus default foobar foofoo temptemp temp testtest test rootroot root adminadmin mypassword mypass pass Login login Password password passwd zxcvbn zxcvb zxccxz zxcxz qazwsxedc qazwsx q1w2e3 qweasdzxc asdfgh asdzxc asddsa asdsa qweasd qwerty qweewq qwewq nimda administrator Admin admin a1b2c3 1q2w3e 1234qwer 1234abcd 123asd 123qwe 123abc 123321 12321 123123 1234567890 123456789 12345678 1234567 123456 12345 1234 123  
Spreading via removable storage media The worm copies its executable file to all removable media under the following name: :\RECYCLER\S-<%d%>-<%d%>-%d%>-%d%>-%d%>-%d%>-%d%>\.vmx, In addition to its executable file, the worm also places the file shown below in the root of every disk: :\autorun.inf This file will launch the worm's executable file each time Explorer is used to open the infected disk. Payload

When launched, the worm injects its code in the address space of one of the active “svchost.exe” system processes. This code delivers the worm's main malicious payload and:

disables the following services:
wuauserv BITS blocks access to addresses which contain any of the strings listed below: indowsupdate wilderssecurity threatexpert castlecops spamhaus cpsecure arcabit emsisoft sunbelt securecomputing rising prevx pctools norman k7computing ikarus hauri hacksoft gdata fortinet ewido clamav comodo quickheal avira avast esafe ahnlab centralcommand drweb grisoft eset nod32 f-prot jotti kaspersky f-secure computerassociates networkassociates etrust panda sophos trendmicro mcafee norton symantec microsoft defender rootkit malware spyware virus  
The worm may also download files from links of the type shown below:
http:///search?q=<%rnd2%>

rnd2 is a random number; URL is a link generated by a special algorithm which uses the current date. The worm gets the current date from one of the sites shown below:

http://www.w3.org
http://www.ask.com
http://www.msn.com
http://www.yahoo.com
http://www.google.com
http://www.baidu.com
Downloaded files are saved to the Windows system directory under their original names.


Removal instructions:

If your computer does not have an up-to-date antivirus solution, or does not have an antivirus solution at all, you can either use a special removal tool (which can be found here or follow the instructions below:

Delete the following system registry key:
[HKLM\SYSTEM\CurrentControlSet\Services\netsvcs]
Delete “%System%\.dll” from the system registry key value shown below:
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost]
"netsvcs"
Reboot the computer.
Delete the original worm file (the location will depend on how the program originally penetrated the victim machine).

Delete copies of the worm:
%System%\dir.dll
%Program Files%\Internet Explorer\.dll
%Program Files%\Movie Maker\.dll
%All Users Application Data%\.dll
%Temp%\.dll
%System%\tmp
%Temp%\.tmp
is a random string of symbols.

Delete the files shown below from all removable storage media:
:\autorun.inf
:\RECYCLER\S-<%d%>-<%d%>-%d%>-%d%>-%d%>-%d%>-%d%>\.vmx,

Download and install updates for the operating system:
Download System updates
Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).

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