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Virus:Worm/Palevo.ER
Date discovered:28/05/2009
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:103.426 Bytes
MD5 checksum:efb79707d37652ce1ffe296d77e55277
IVDF version:7.01.04.30 - Thursday, May 28, 2009

 General Method of propagation:
    Messenger


Aliases:
   •  Bitdefender: Worm.P2P.Palevo.ER
   •  Panda: Trj/Agent.NWH
   •  Eset: IRC/SdBot


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


Side effects:
   • 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://browseusers.myspace.com/Browse/**********


The location is the following:
   • http://67.215.66.132/**********




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.

 Backdoor The following port is opened:

url.dig**********.com on TCP port 1234

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

Beschrijving ingevoegd door Petre Galan op woensdag 15 september 2010
Beschrijving bijgewerkt door Petre Galan op woensdag 15 september 2010

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