Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,C:\DOCUME~1\%USERNAME%\LOCALS~1\Temp\ctfmon.exe,'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
- Windows Security Center
Creates and executes the following:
- '%TEMP%\ctfmon.exe'
Executes the following:
- '<SYSTEM32>\ping.exe' dns3.portalescolas.com -l 1 -n 1
- '<SYSTEM32>\find.exe' "TTL"
- '<SYSTEM32>\ping.exe' www.go###e.com.br -n 1 -l 1
- '<SYSTEM32>\find.exe' /i "a interface"
- '<SYSTEM32>\ipconfig.exe' /renew
- '<SYSTEM32>\ipconfig.exe' /release
- '<SYSTEM32>\ipconfig.exe' /flushdns
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v "Userinit" /t REG_SZ /d "<SYSTEM32>\userinit.exe,C:\Documents and Settings\%USERNAME%\LOCALS~1\Temp\ctfmon.exe," /f
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v EnableLUA /t REG_DWORD /d 0 /f
- '<SYSTEM32>\fsutil.exe' file createnew "%TEMP%\thunb.db" 666"
- '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Security Center" /v AntiVirusDisableNotify /t REG_DWORD /d 0x00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v DisableSR /t REG_DWORD /d 0x00000001 /f
- '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Security Center" /v UpdatesDisableNotify /t REG_DWORD /d 0x00000001 /f
- '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Security Center" /v FirewallDisableNotify /t REG_DWORD /d 0x00000001 /f
Modifies file system :
Creates the following files:
- %TEMP%\13972tmp.vbs
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\sal[1].php
- %TEMP%\ctfmon.exe
- %TEMP%\2816HXBK.bat
Sets the 'hidden' attribute to the following files:
- %TEMP%\2816HXBK.bat
Deletes the following files:
- %TEMP%\13972tmp.vbs
Network activity:
Connects to:
- 're###.###itorderegistros.com.br':80
- 'localhost':1038
TCP:
HTTP GET requests:
- re###.###itorderegistros.com.br/sal.php?a=###################
UDP:
- DNS ASK dn##.##rtalescolas.com
- DNS ASK www.go###e.com.br
- DNS ASK re###.###itorderegistros.com.br
Miscellaneous:
Searches for the following windows:
- ClassName: 'MS_AutodialMonitor' WindowName: '(null)'
- ClassName: 'MS_WebcheckMonitor' WindowName: '(null)'
- ClassName: '' WindowName: '(null)'
- ClassName: 'EDIT' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
