Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '4f5d9ae0a6b88480ac91dcadc51a8b24' = '"%APPDATA%\skype.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '4f5d9ae0a6b88480ac91dcadc51a8b24' = '"%APPDATA%\skype.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\4f5d9ae0a6b88480ac91dcadc51a8b24.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\skype.exe' = '%APPDATA%\skype.exe:*:Enabled:skype.exe'
Creates and executes the following:
- '%APPDATA%\skype.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\skype.exe" "skype.exe" ENABLE
Modifies file system :
Creates the following files:
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\AssemFiles\26F9B028\D\UGxhdGZvcm06IFdpbmRvd3MgWFA=.bin
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\AssemFiles\26F9B028\D\UGxhdGZvcm06IC5ORVQgNC4wIGluc3RhbGxlZA==.bin
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\AssemFiles\26F9B028\D\UGxhdGZvcm0gQ1BVIENvcmVzOiAy.bin
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\AssemFiles\26F9B028\D\UGxhdGZvcm0gT1MgQml0bmVzczogMzI=.bin
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\AssemFiles\26F9B028\D\UGxhdGZvcm0gQ3VsdHVyZSBOYW1lOiBlbi1VUw==.bin
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\identity.dat
- %APPDATA%\skype.exe
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\info.dat
- <LS_APPDATA>\IsolatedStorage\g2f5go4j.ncm\43popkhl.cmu\StrongName.udq0tlximocjmoundttfbjoidszemtxn\AssemFiles\26F9B028\Usages.bin
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
