Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'crsss' = '<SYSTEM32>\TxHMoU.Exe'
Creates the following files on removable media:
- <Drive name for removable media>:\AUToRUN.Inf
- <Drive name for removable media>:\soS.Exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
Executes the following:
- '%ProgramFiles%\Internet Explorer\IEXPLORE.EXE'
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN" /v CheckedValue /t REG_dword /d 00000002 /f
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL" /v CheckedValue /t REG_SZ /d 0 /f
- '<SYSTEM32>\cmd.exe' /c <Current directory>\<Virus name>.bat
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel" /v "HomePage" /t REG_DWORD /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /t REG_EXPAND_SZ /d MZђ
- '<SYSTEM32>\cmd.exe' /c ""<Current directory>\<Virus name>.bat""
- '<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\Run /V crsss /T REG_SZ /D <SYSTEM32>\TxHMoU.Exe /F
- '<SYSTEM32>\TxHMoU.Exe'
- '<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v ShowSuperHidden /t reg_dword /d 00000000 /f
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v HideFileExt /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\EXPlorer\Advanced" /v Hidden /t reg_dWord /d 00000000 /f
Modifies file system:
Creates the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\url[1].txt
- <SYSTEM32>\FSEb.COM
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\IE[1].txt
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\IE[1].txt
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\table[1].txt
- <SYSTEM32>\FSEc.COM
- <SYSTEM32>\FSEx.COM
- <SYSTEM32>\AUToRUN.Inf
- <Current directory>\<Virus name>.bat
- <SYSTEM32>\TxHMoU.Exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\table[1].txt
- C:\AUToRUN.Inf
- C:\soS.Exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\soS.Exe
- <Drive name for removable media>:\AUToRUN.Inf
- C:\soS.Exe
- C:\AUToRUN.Inf
Deletes itself.
Network activity:
Connects to:
- 'www.ip##0.com':80
- 'localhost':1039
TCP:
HTTP GET requests:
- http://www.ip##0.com/url.txt
- http://www.ip##0.com/IE.txt
- http://www.ip##0.com/table.txt
UDP:
- DNS ASK www.ip##0.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'MS_WebcheckMonitor' WindowName: ''
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: '' WindowName: ''
- ClassName: 'MS_AutodialMonitor' WindowName: ''
