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Worm-P2P.malas.b Analysis Report
Threat Submitted On: 3/9/2008 9:01:55 PM
Threat Analysed On: 3/10/2008 2:01:55 AM
Threat Updated On: 11/16/2009 8:15:25 AM
Type : Worm-P2P
Symptoms of malas.b
  • Spreads through peer-to-peer networking software.
  • Make a copy of themselves into the shared folder of the local machine and in available to other users of the same P2P network.
Information
Alias : p2p-worm.win32.malas.b
Md5 Hash : [584d5293ff242bc77553a615e2f8322a]
File Size : (139266 bytes)

Here are the Technical findings of our analysis team after analyzing this malware in detail :-

Creates the following infected Files on user's System
Note:
Delete the following Files to remove Infection
File: office update.lnk
Path : %allusersprofile%\start menu\programs\startup
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
8b0895ed9ad973618b8b097107773914 ( 1492 bytes)
bfe994939c149e68e8ab61a4a47b5db7 ( 1492 bytes)
File: msshare.exe
Path : %programfiles%\common files\microsoft shared
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
584d5293ff242bc77553a615e2f8322a ( 139266 bytes)
b3308808c3291c85b845e812fcb3c5e5 ( 139264 bytes)
File: sex_game.exe
Path : %programfiles%\edonkey2000\incoming
Md5Hash :( bytes)
File: sex_game.exe
Path : %programfiles%\emule\incoming
Md5Hash :( bytes)
File: sex_screensaver.scr
Path : %programfiles%\emule\incoming
Md5Hash :( bytes)
File: sex_game.exe
Path : %programfiles%\icq\shared files
Md5Hash :( bytes)
File: sex_screensaver.scr
Path : %programfiles%\icq\shared files
Md5Hash :( bytes)
File: sex_game.exe
Path : %programfiles%\kazaa\my shared folder
Md5Hash :( bytes)
File: sex_game.exe
Path : %programfiles%\kmd\my shared folder
Md5Hash :( bytes)
File: sex_game.exe
Path : %programfiles%\limewire\shared
Md5Hash :( bytes)
File: sex_screensaver.scr
Path : %programfiles%\limewire\shared
Md5Hash :( bytes)
File: soundmax.exe
Path : %programfiles%\sound utility
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
584d5293ff242bc77553a615e2f8322a ( 139266 bytes)
b3308808c3291c85b845e812fcb3c5e5 ( 139264 bytes)
File: autoply.exe
Path : %systemdrive%
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
584d5293ff242bc77553a615e2f8322a ( 139266 bytes)
b3308808c3291c85b845e812fcb3c5e5 ( 139264 bytes)
File: sex_game.exe
Path : %systemdrive%\inetpub\ftproot
Md5Hash :( bytes)
File: sex_screensaver.scr
Path : %systemdrive%\inetpub\ftproot
Md5Hash :( bytes)
File: svchost.exe
Path : %temp%
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
584d5293ff242bc77553a615e2f8322a ( 139266 bytes)
b3308808c3291c85b845e812fcb3c5e5 ( 139264 bytes)
File: officeupdate.exe
Path : %windir%\web
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
584d5293ff242bc77553a615e2f8322a ( 139266 bytes)
b3308808c3291c85b845e812fcb3c5e5 ( 139264 bytes)
File: [randomname].exe
Path : %workingdir%
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
584d5293ff242bc77553a615e2f8322a ( 139266 bytes)
b3308808c3291c85b845e812fcb3c5e5 ( 139264 bytes)
Also creates the following files on user's System which are also created by Genuine Software :-
Note:
These file(s) can be kept as they are also created by genuine Software.
File : calculator.lnk
Path : %allusersprofile%\start menu\programs\accessories
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
68248bc7a89ae6c7913996d41bd7c909 ( 1731 bytes)
de07cfa8a3aa9d323119fc266834a688 ( 1731 bytes)
File : paint.lnk
Path : %allusersprofile%\start menu\programs\accessories
Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
2831485b35a4ea9a1f98fbcd49c77268 ( 1743 bytes)
d8eacbe4c3074cfc84b3c9c2c6490576 ( 1743 bytes)
File : desktop.ini
Path : %homepath%\my documents
Md5Hash :869cba0364c55b0c6524419a8b86df88 ( 83 bytes)
File : desktop.ini
Path : %homepath%\my documents\my pictures
Md5Hash :f958dc73dc27ae8589bc1b1dfbd18e4a ( 190 bytes)
File : autorun.inf
Path : %systemdrive%
Md5Hash :6bb6511e595902b50fd76ca4e85dc1a3 ( 301 bytes)
File : desktop.ini
Path : %userprofile%\application data
Md5Hash :88cf0ff92a4a9fa7bd9b7513b2e9e22b ( 62 bytes)
File : desktop.ini
Path : %userprofile%\start menu
Md5Hash :87f8888e1d77d9cef69e901a97d40d73 ( 62 bytes)
The following Registry Values are added to the provided Registry Keys :-
Note:
Delete the added Values from the Key to remove Infection
|__ Value Added :
nofolderoptions = "[reg_dword, value: 00000001]"
|__ Value Added :
soundmax = "%programfiles%\sound utility\soundmax.exe"
Also creates the following legitmate Registries on user's Systems which are also created by Genuine Software :-
Note:
These Keys can be kept as they are also created by genuine Software
The following Registry Values are added to the provided Registry Keys which are also created by Genuine Software :-
Note:
These Values can be left as they are also created by legitimate Software :-
Creates the following child process(s) on execution:

%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

%windir%\system32\at.exe /delete /yes

%windir%\system32\at.exe 20:30 /every:m,t,w,th,f,s,su %windir%\web\officeupdate.exe

%windir%\system32\at.exe 11:30 /every:m,t,w,th,f,s,su %windir%\web\officeupdate.exe

Creates the Following MUTEX(s) on user's System:-
b542345
Copies the Following Files to Given Location :-

Copies :%workingdir%\[random name].exe

To : %systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\common files\microsoft shared\msshare.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\sound utility\soundmax.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %windir%\web\officeupdate.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %systemdrive%\autoply.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : e:\autoply.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\kazaa lite\my shared folder\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\kazaa lite\my shared folder\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\kazaa\my shared folder\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\kazaa\my shared folder\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\edonkey2000\incoming\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\edonkey2000\incoming\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\icq\shared files\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\icq\shared files\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\emule\incoming\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\emule\incoming\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\gnucleus\downloads\incoming\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\gnucleus\downloads\incoming\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\kmd\my shared folder\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\kmd\my shared folder\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\limewire\shared\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %programfiles%\limewire\shared\sex_game.exe

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %systemdrive%\inetpub\ftproot\sex_screensaver.scr

Copies :%systemdrive%\docume~1\antisp~1\locals~1\temp\svchost.exe

To : %systemdrive%\inetpub\ftproot\sex_game.exe

NOTE:

1. %allusersprofile% Refers to the windows all users profile folder. By default it is 'C:\Documents and Settings\All Users'
2. %programfiles% Refers to the program files folder. By default it is 'C:\Program Files'
3. %systemdrive% Refers to the windows System drive folder. By default it is 'C:\'
4. %temp% Refers to the windows temp folder. By default it is 'C:\Documents and Settings\[user]\Local Settings\Temp'
5. %windir% Refers to the windows root folder. By default it is 'C:\Windows'
6. %workingdir% Refers to the current directory in which user is working.
7. %homepath% Refers to the windows current user's profile folder. By default it is 'C:\Documents and Settings\[user]'
8. %userprofile% Refers to the windows current user's profile folder. By default it is 'C:\Documents and Settings\[user]'

Important: We strongly recommend that you backup the Registry before making any changes to it. Incorrect changes to the Registry can result in permanent data loss or corrupted Files. Modify the malicious\suspicious Subkeys only.

Click Here for more spywarelib.com recommended PC Security and Optimization Tools

To modify registry entries in Windows Operating System:
Follow Steps:
1. Click Start > Run
2. Type “regedit” : to open registry editor
3. Navigate to required registry Key from the Left Tree control and modify accordingly.

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