Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'Windows sounds' = '"%WINDIR%\Microsoft Audio\Windows logon sounds.exe"'
Malicious functions
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Creates and executes the following (exploit)
- '%APPDATA%\chung7995.exe'
Injects code into
the following user processes:
- iexplore.exe
Modifies file system
Creates the following files
- %APPDATA%\chung7995.exe
- %WINDIR%\microsoft audio\windows logon sounds.exe
- %TEMP%\install.bat
Sets the 'hidden' attribute to the following files
- %WINDIR%\microsoft audio\windows logon sounds.exe
Network activity
TCP
HTTP GET requests
- http://ab##s.ir/chungx/chungx.exe
UDP
- DNS ASK ab##s.ir
Miscellaneous
Creates and executes the following
- '%WINDIR%\microsoft audio\windows logon sounds.exe'
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\install.bat" "' (with hidden window)
Executes the following
- '%CommonProgramFiles%\microsoft shared\equation\eqnedt32.exe' -Embedding
- '%WINDIR%\syswow64\cmd.exe' <SYSTEM32>\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
- '%WINDIR%\syswow64\reg.exe' ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\install.bat" "
- '%WINDIR%\syswow64\ping.exe' 127.0.0.1 -n 2
- '%ProgramFiles(x86)%\internet explorer\iexplore.exe'
