Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'b092d8ba6ca47cbd99a505b4591190d4' = '"%HOMEPATH%\csrss.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'b092d8ba6ca47cbd99a505b4591190d4' = '"%HOMEPATH%\csrss.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\b092d8ba6ca47cbd99a505b4591190d4.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%HOMEPATH%\csrss.exe' = '%HOMEPATH%\csrss.exe:*:Enabled:csrss.exe'
Creates and executes the following:
- '%HOMEPATH%\csrss.exe'
Executes the following:
- '<SYSTEM32>\wbem\wmiadap.exe' /R /T
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%HOMEPATH%\csrss.exe" "csrss.exe" ENABLE
Modifies file system :
Creates the following files:
- %HOMEPATH%\csrss.exe
Deletes the following files:
- <SYSTEM32>\PerfStringBackup.TMP
- <SYSTEM32>\wbem\Performance\WmiApRpl.ini
Network activity:
Connects to:
- 'm0####d.no-ip.biz':1177
UDP:
- DNS ASK m0####d.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
