Virus:Worm/IRCBo.111104.5
Date discovered:07/07/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:111.104 Bytes
MD5 checksum:f3782ede5dbbd61cbcd5546040af92c1
IVDF version:7.10.09.33 - Wednesday, July 7, 2010

 General Method of propagation:
   • Messenger


Aliases:
   •  Bitdefender: Backdoor.Bot.123108
   •  Eset: IRC/SdBot


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


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

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



It deletes the initially executed copy of itself.




It tries to download some files:

– The location is the following:
   • http://www.cpalead.com/**********


– The location is the following:
   • http://www.cpalead.com/**********


– The location is the following:
   • http://update.articlesdealing.com/**********




It tries to executes the following files:

– Filename:
   • net stop MsMpSvc


– Filename:
   • net1 stop MsMpSvc


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


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


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


– Filename:
   • %WINDIR%\infocard.exe


– Filename:
   • net stop wuauserv


– Filename:
   • net1 stop wuauserv


– Filename:
   • sc config wuauserv start= disabled

 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: url.dig**********.com
Port: 1234
Channel: #jakarta
Nickname: NEW-[USA|00|P|%number%]

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Wednesday, August 11, 2010
Description updated by Petre Galan on Wednesday, August 11, 2010

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