Virus:Worm/Palevo.BG
Date discovered:22/07/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Low to medium
Static file:Yes
File size:98.304 Bytes
MD5 checksum:2d06539d0fc214a455cc410ec05cadf8
VDF version:7.10.04.43
IVDF version:7.10.09.161 - Thursday, July 22, 2010

 General Methods of propagation:
   • Autorun feature
   • Messenger
   • Peer to Peer


Aliases:
   •  Kaspersky: P2P-Worm.Win32.Palevo.bkea
   •  Sophos: Mal/Palevo-A
   •  Bitdefender: Trojan.Generic.KDV.92297
   •  Panda: W32/P2PWorm.PQ
   •  GData: Trojan.Generic.KDV.92297


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


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Registry modification
   • Steals information
   • Makes use of software vulnerability
      •  CVE-2007-1204
      •  MS07-019

 Files It copies itself to the following locations:
   • %recycle bin%\%CLSID%\csisd.exe
   • %drive%\RECYCLER\autorun.exe



The following files are created:

– %recycle bin%\%CLSID%\Desktop.ini
– %drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

– %recycle bin%\%CLSID%\jwjqa.exe
– %recycle bin%\%CLSID%\ju7bd.exe
– %recycle bin%\%CLSID%\psyjo3.exe
– %recycle bin%\%CLSID%\jwkd.exe
– %recycle bin%\%CLSID%\lsq.exe
– %recycle bin%\%CLSID%\dfe.exe
– %WINDIR%\ghdrive32.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Dldr.FirNix.AD

– %recycle bin%\%CLSID%\t7vd.exe
– %recycle bin%\%CLSID%\lsvb.exe
– %recycle bin%\%CLSID%\jikd.exe
– %recycle bin%\%CLSID%\system.exe



It tries to download some files:

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\572.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\962.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Dldr.FirNix.AD


– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\176.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\600.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\231.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\032.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\595.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\485.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\924.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\686.exe

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\904.exe



It tries to execute the following files:

– Filename:
   • %TEMPDIR%\485.exe


– Filename:
   • %TEMPDIR%\924.exe


– Filename:
   • %TEMPDIR%\904.exe


– Filename:
   • %TEMPDIR%\231.exe


– Filename:
   • %TEMPDIR%\176.exe


– Filename:
   • %TEMPDIR%\032.exe


– Filename:
   • %TEMPDIR%\686.exe


– Filename:
   • %TEMPDIR%\572.exe


– Filename:
   • %TEMPDIR%\600.exe


– Filename:
   • %TEMPDIR%\962.exe


– Filename:
   • %TEMPDIR%\595.exe


– Filename:
   • %WINDIR%\ghdrive32.exe

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

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Taskman"="%recycle bin%\%CLSID%\csisd.exe"

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Shell"="%recycle bin%\%CLSID%\dfe.exe,%recycle bin%\%CLSID%\system.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-2734\ju7bd.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-1343\jwjqa.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-8333\lsvb.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-8763\lsq.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-9143\jikd.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-9043\jwkd.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-1214\t7vd.exe,explorer.exe,%recycle bin%\S-1-5-21-0243556031-888888379-781863308-1455\psyjo3.exe"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Fgfk"="%recycle bin%\%CLSID%\lsq.exe"
   • "Fnfx"="%recycle bin%\%CLSID%\dfe.exe"
   • "Fvbk"="%recycle bin%\%CLSID%\lsvb.exe"
   • "Teswf"="%recycle bin%\%CLSID%\system.exe"
   • "jaqq"="%recycle bin%\%CLSID%\jwkd.exe"
   • "jkqq"="%recycle bin%\%CLSID%\jikd.exe"
   • "ju7bd"="%recycle bin%\%CLSID%\ju7bd.exe"
   • "psysjo3"="%recycle bin%\%CLSID%\psyjo3.exe"
   • "sdjwe"="%recycle bin%\%CLSID%\jwjqa.exe"
   • "t7vd"="%recycle bin%\%CLSID%\t7vd.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Microsoft Driver Setup"="%WINDIR%\ghdrive32.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\
   Run]
   • "Microsoft Driver Setup"="%WINDIR%\ghdrive32.exe"



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

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile]
   • "EnableFirewall"=dword:0x00000000

 P2P In order to infect other systems in the Peer to Peer network community the following action is performed:   It retrieves shared folders by querying the following registry keys:
   • Software\BearShare\General
   • Software\iMesh\General
   • Software\Shareaza\Shareaza\Downloads
   • Software\Kazaa\LocalContent
   • Software\DC++
   • Software\eMule
   • Software\Microsoft\Windows\CurrentVersion\Uninstall\eMule Plus_is1

   It searches for directories that contain the following substring:
   • \Local Settings\Application Data\Ares\My Shared Folder


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

– Windows 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 Contact server:
All of the following:
   • play.jav**********.com:1863 (UDP)
   • play.jav**********.com:7196 (TCP)
   • mails.joo**********.com:8800 (TCP)
   • tf122.tef**********.com:8800 (TCP)
   • t173.tef**********.com:8800 (TCP)
   • tf130.tef**********.com:8800 (TCP)
   • tf98.tef**********.com:8800 (TCP)
   • tf50.tef**********.com:8800 (TCP)
   • tf18.tef**********.com:8800 (TCP)
   • mix.tef**********.com:8800 (TCP)
   • peas.com**********.org:8800 (TCP)
   • 66.7.22**********.28:8800 (TCP)


 Stealing It tries to steal the following information:

– Passwords from the following programs:
   • Mozilla Firefox
   • Internet Explorer

 Injection – It injects itself as a remote thread into a process.

    Process name:
   • explorer.exe


 Miscellaneous Mutex:
It creates the following Mutexes:
   • fwghw
   • psyjo
   • f7bd
   • fewhx
   • sewwwefwef
   • mdge
   • ihoj133
   • fedfw
   • omdgv
   • jhg28gdhrg2fcs
   • dwcfewf
   • g37v

 File details Programming language:
 The malware program was written in MS Visual C++.


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, April 20, 2011
Description updated by Petre Galan on Wednesday, April 20, 2011

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