Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '8ef6e5fbcf93c20a9c240921a52d8776' = '"%TEMP%\yahoo.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '8ef6e5fbcf93c20a9c240921a52d8776' = '"%TEMP%\yahoo.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\8ef6e5fbcf93c20a9c240921a52d8776.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\yahoo.exe' = '%TEMP%\yahoo.exe:*:Enabled:yahoo.exe'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\wscript.exe' = '<SYSTEM32>\wscript.exe:*:Enabled:wscript.exe'
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Creates and executes the following:
- '%TEMP%\yahoo.exe'
Executes the following:
- '<SYSTEM32>\wscript.exe' "%TEMP%\yahoo.vbe"
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "<SYSTEM32>\wscript.exe" "wscript.exe" ENABLE
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\yahoo.exe" "yahoo.exe" ENABLE
Modifies file system :
Creates the following files:
- %TEMP%\yahoo.vbe
- %TEMP%\yahoo.exe
Deletes the following files:
- %TEMP%\yahoo.vbe
Network activity:
Connects to:
- 'ka####1.no-ip.biz':1177
UDP:
- DNS ASK ka####1.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
