Full description

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.

설명 삽입자 Petre Galan 2009년 12월 10일 목요일
설명 업데이트 Petre Galan 2009년 12월 10일 목요일

뒤로 . . . .

내 계정