Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '881c20e0b9874d571e58da35ad97fee1' = '"%WINDIR%\csrss.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '881c20e0b9874d571e58da35ad97fee1' = '"%WINDIR%\csrss.exe" ..'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\csrss.exe' = '%WINDIR%\csrss.exe:*:Enabled:csrss.exe'
Creates and executes the following:
- '%WINDIR%\csrss.exe'
- '<LS_APPDATA>CJpyyiYhiC.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%WINDIR%\csrss.exe" "csrss.exe" ENABLE
Modifies file system :
Creates the following files:
- %WINDIR%\csrss.exe
- %TEMP%\4434F.dmp
- %TEMP%\dw.log
- <LS_APPDATA>CJpyyiYhiC.exe
- <LS_APPDATA>MoEnoFWUiQ..CT
Network activity:
Connects to:
- 'xx#####dinexx.no-ip.biz':1177
UDP:
- DNS ASK xx#####dinexx.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
