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Virus:Worm/IrcBot.111245.1
Date discovered:03/05/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:111.245 Bytes
MD5 checksum:4221836aabd101e48a6a849b6f7f8c44
IVDF version:7.10.07.18 - Monday, May 3, 2010

 General Method of propagation:
   • Messenger


Aliases:
   •  Panda: W32/OscarBot.YH.worm
   •  Eset: IRC/SdBot
   •  Bitdefender: Win32.Worm.Palevo.AJ


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Lowers security settings
   • Registry modification
   • Third party control

 Files It copies itself to the following locations:
   • %WINDIR%\infocard.exe
   • %WINDIR%\infocard.exb



It deletes the initially executed copy of itself.



The following files are created:

%WINDIR%\mds.sys
%WINDIR%\mdt.sys
%WINDIR%\winbrd.jpg



It tries to download some files:

– The location is the following:
   • http://get.articleslinked.com/**********


– The location is the following:
   • http://browseusers.myspace.com/Browse/**********




It tries to executes the following files:

– Filename:
   • net stop MsMpSvc


– Filename:
   • net1 stop MsMpSvc


– Filename:
   • net stop wuauserv


– Filename:
   • net1 stop wuauserv


– Filename:
   • sc config wuauserv start= disabled


– Filename:
   • netsh firewall add allowedprogram 1.exe 1 ENABLE


– Filename:
   • "%WINDIR%\infocard.exe"


– Filename:
   • explorer.exe http://browseusers.myspace.com/Browse/Browse.aspx

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Firewall Administrating"="%WINDIR%\infocard.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\
   Install\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Firewall Administrating"="%WINDIR%\infocard.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Firewall Administrating"="%WINDIR%\infocard.exe"



It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "%executed file%"="%WINDIR%\infocard.exe:*:Enabled:Firewall
      Administrating"

 Messenger It is spreading via Messenger. The characteristics are described below:

– Yahoo Messenger

The URL then refers to a copy of the described malware. If the user downloads and executes this file the infection process will start again.

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: e2d**********.org
Port: 2345
Channel: #imb
Nickname: NEW-[USA|00|P|%number%]

Description insérée par Petre Galan le mercredi 30 juin 2010
Description mise à jour par Petre Galan le mercredi 30 juin 2010

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