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Virus:TR/Spy.303104.52
Date discovered:03/11/2009
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:117.148 Bytes
MD5 checksum:470f47b873e4453fb4e603a83ea8c5c6
IVDF version:7.01.06.185 - Tuesday, November 3, 2009

 General Method of propagation:
Autorun feature


Aliases:
   •  Bitdefender: Win32.Worm.Autorun.UG


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


Side effects:
   • Downloads a malicious file
   • Drops malicious files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following locations:
   • %SYSDIR%\rttrwq.exe
   • %drive%\t9ajs9fo.exe



It deletes the initially executed copy of itself.



It deletes the following file:
   • %SYSDIR%\drivers\cdaudio.sys



The following files are created:

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

%SYSDIR%\mkfght0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ZPACK.Gen




It tries to download a file:

The location is the following:
   • http://cdju9.com/xjj/**********
At the time of writing this file was not online for further investigation.

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

  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "ertyuop"="%SYSDIR%\rttrwq.exe"



The following registry keys are changed:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   Connections]
   New value:
   • "DefaultConnectionSettings"=hex:46,00,00,00,04,00,00,00,09,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,04,00,00,00,00,00,00,00,00,5D,BA,DF,B3,79,CA,01,00,00,00,00,00,00,00,00,00,00,00,00,01,00,00,00,02,00,00,00,C0,A8,6B,64,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:0x00000002
   • "ShowSuperHidden"=dword:0x00000000

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:0x00000000

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

說明撰寫者 Petre Galan 開啟 2009年12月10日星期四
說明更新者 Petre Galan 開啟 2009年12月10日星期四

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