Win32.HLLW.Autoruner1.35459
Added to the Dr.Web virus database:
2013-04-22
Virus description added:
2013-04-30
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'crsss' = '<SYSTEM32>\crsss.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\GHO.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
Creates and executes the following:
Executes the following:
- '<SYSTEM32>\cmd.exe' /c ""<Current directory>\<Virus name>.bat""
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /t REG_EXPAND_SZ /d MZђ
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel" /v "HomePage" /t REG_DWORD /d 00000001 /f
- '<SYSTEM32>\cmd.exe' /c <Current directory>\<Virus name>.bat
- '<SYSTEM32>\reg.exe' ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /V crsss /T REG_SZ /D <SYSTEM32>\crsss.exe /F
- '<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WindowsUpdate /v DisableWindowsUpdateAccess /t REG_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL /v CheckedValue /t REG_dword /d 00000000 /f
Modifies file system :
Creates the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\2[1].txt
- <SYSTEM32>\test1.txt
- <SYSTEM32>\d.txt
- <SYSTEM32>\c.txt
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\1[1].txt
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\3[1].txt
- <Current directory>\<Virus name>.bat
- <SYSTEM32>\crsss.exe
- <SYSTEM32>\Autorun.inf
- C:\autorun.inf
- C:\GHO.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\GHO.exe
- <Drive name for removable media>:\autorun.inf
- C:\GHO.exe
- C:\autorun.inf
Deletes itself.
Network activity:
Connects to:
- 'www.yx###.com.cn':80
- 'localhost':1036
TCP:
HTTP GET requests:
- www.yx###.com.cn/xz/1.txt
- www.yx###.com.cn/xz/2.txt
- www.yx###.com.cn/xz/3.txt
UDP:
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