Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'bf311d7166c888a19b0f97c496d819ef' = '"%TEMP%\brs.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'bf311d7166c888a19b0f97c496d819ef' = '"%TEMP%\brs.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\bf311d7166c888a19b0f97c496d819ef.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\brs.exe' = '%TEMP%\brs.exe:*:Enabled:brs.exe'
Creates and executes the following:
- '%TEMP%\is-PE26J.tmp\SafeIP.tmp' /SL5="$40036,2021521,122368,%TEMP%\SafeIP.exe"
- '%TEMP%\brs.exe'
- '%TEMP%\Jz3jXServer.exe'
- '%TEMP%\SafeIP.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\brs.exe" "brs.exe" ENABLE
Modifies file system :
Creates the following files:
- %TEMP%\is-PE26J.tmp\SafeIP.tmp
- %TEMP%\brs.exe
- %TEMP%\Jz3jXServer.exe
- %TEMP%\SafeIP.exe
Network activity:
Connects to:
- 'ja#####ns101.ddns.net':1177
UDP:
- DNS ASK ja#####ns101.ddns.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
