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Virus:TR/Buzus.cptr
Date discovered:23/11/2009
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:262.144 Bytes
MD5 checksum:20f60d32f26b0bcc1b17aa994ddeed14
IVDF version:7.10.01.47 - Monday, November 23, 2009

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Mcafee: W32/Palack.worm
   •  Sophos: W32/AutoRun-AVL
   •  Panda: W32/P2PWorm.EK.worm
   •  Eset: Win32/AutoRun.IRCBot.DI
   •  Bitdefender: Trojan.Dropper.VB


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


Side effects:
   • Drops malicious files
   • Registry modification
   • Third party control

 Files It copies itself to the following locations:
   • %SYSDIR%\wmispm.exe
   • %drive%\RECDIR-5902\data.sys



It deletes the initially executed copy of itself.



It deletes the following file:
   • %TEMPDIR%\melt.bat



The following files are created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

%TEMPDIR%\melt.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.



It tries to executes the following files:

– Filename:
   • net stop avg8wd


– Filename:
   • "%SYSDIR%\wmispm.exe"


– Filename:
   • net1 stop AntiVirService


– Filename:
   • CMD /C sc stop SbPF.Launcher


– Filename:
   • sc stop avg8wd


– Filename:
   • CMD /C sc config "avast! Antivirus" start= disabled


– Filename:
   • sc stop NOD32krn


– Filename:
   • CMD /C sc config AntiVirService start= disabled


– Filenames:
   • "C:\WORK\!ITW
   • 44.exe"


– Filename:
   • CMD /C sc config avg8wd start= disabled


– Filename:
   • cmd /c ""%TEMPDIR%\melt.bat" "


– Filename:
   • sc config avg8wd start= disabled


– Filename:
   • CMD /C sc delete "avast! Antivirus"


– Filename:
   • CMD /C sc stop "avast! Antivirus"


– Filename:
   • sc delete AntiVirService


– Filename:
   • CMD /C del /F /S /Q *.zip


– Filename:
   • CMD /C sc delete PASRV


– Filename:
   • sc stop SbPF.Launcher


– Filename:
   • CMD /C sc stop avg8wd


– Filename:
   • CMD /C sc stop AntiVirService


– Filename:
   • net1 stop VSSERV


– Filename:
   • CMD /C net stop VSSERV


– Filename:
   • net stop SbPF.Launcher


– Filename:
   • CMD /C del /F /S /Q *.scr


– Filename:
   • sc config SbPF.Launcher start= disabled


– Filename:
   • sc delete SbPF.Launcher


– Filename:
   • CMD /C sc delete VSSERV


– Filename:
   • net stop NOD32krn


– Filename:
   • sc delete PASRV


– Filename:
   • net stop AntiVirService


– Filename:
   • sc delete VSSERV


– Filename:
   • CMD /C net stop SbPF.Launcher


– Filename:
   • sc config "avast! Antivirus" start= disabled


– Filename:
   • net1 stop "avast! Antivirus"


– Filename:
   • sc config AntiVirService start= disabled


– Filename:
   • CMD /C del /F /S /Q *.com


– Filename:
   • CMD /C sc delete AntiVirService


– Filename:
   • CMD /C sc delete SbPF.Launcher


– Filename:
   • CMD /C sc stop VSSERV


– Filename:
   • sc config VSSERV start= disabled


– Filename:
   • CMD /C sc config NOD32krn start= disabled


– Filename:
   • CMD /C sc stop NOD32krn


– Filename:
   • CMD /C net stop SPF4


– Filename:
   • CMD /C sc config PASRV start= disabled


– Filename:
   • CMD /C net stop PASRV


– Filename:
   • CMD /C net stop "avast! Antivirus"


– Filename:
   • CMD /C net stop AntiVirService


– Filename:
   • sc stop PASRV


– Filename:
   • CMD /C sc stop PASRV


– Filename:
   • sc delete "avast! Antivirus"


– Filename:
   • net1 stop SbPF.Launcher


– Filename:
   • net1 stop avg8wd


– Filename:
   • sc delete avg8wd


– Filename:
   • sc config NOD32krn start= disabled


– Filename:
   • sc stop VSSERV


– Filename:
   • CMD /C sc stop SPF4


– Filename:
   • CMD /C net stop NOD32krn


– Filename:
   • sc stop "avast! Antivirus"


– Filename:
   • net stop VSSERV


– Filename:
   • net stop PASRV


– Filename:
   • sc delete NOD32krn


– Filename:
   • CMD /C sc config VSSERV start= disabled


– Filename:
   • sc stop AntiVirService


– Filename:
   • CMD /C sc delete avg8wd


– Filename:
   • CMD /C sc config SbPF.Launcher start= disabled


– Filename:
   • CMD /C net stop avg8wd


– Filename:
   • net stop "avast! Antivirus"


– Filename:
   • net1 stop PASRV


– Filename:
   • sc config PASRV start= disabled


– Filename:
   • CMD /C sc delete NOD32krn


– Filename:
   • net1 stop NOD32krn

 Registry One of the following values is added in order to run the process after reboot:

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "ctfmon.exe"="ctfmon.exe"



The following registry keys are added:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\ctfmon.exe]
   • "Debugger"="wmispm.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\
   Layers]
   • "%SYSDIR%\wmispm.exe"="DisableNXShowUI"



The following registry keys are changed:

– [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal]
   New value:
   • "ctfmon.exe"="ctfmon.exe"

– [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network]
   New value:
   • "ctfmon.exe"="ctfmon.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions]
   New value:
   • "GON"="%executed file%"

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

Server: ascend.sr**********.info
Port: 31960
Channel: #w1sd0m
Nickname: [00|USA|XP|%number%]

 File details Programming language:
The malware program was written in Visual Basic.

Description inserted by Petre Galan on Thursday, April 8, 2010
Description updated by Petre Galan on Thursday, April 8, 2010

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