Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'System' = 'kdcuj.exe'
Malicious functions:
Creates and executes the following:
- '%TEMP%\rar.exe'
- '%TEMP%\zip.exe'
- '%TEMP%\nse3.tmp\ns4.tmp' "%TEMP%\unrar.exe" e -o+ -pMTk1jMTk1jMTk1 logo.jpg
- '%TEMP%\UnRAR.exe' e -o+ -pMTk1jMTk1jMTk1 logo.jpg
Executes the following:
- '%WINDIR%\explorer.exe'
Injects code into
the following system processes:
- <SYSTEM32>\alg.exe
- <SYSTEM32>\spoolsv.exe
- %WINDIR%\Explorer.EXE
- <SYSTEM32>\cscript.exe
- <SYSTEM32>\wbem\wmiprvse.exe
- <SYSTEM32>\cmd.exe
- <SYSTEM32>\services.exe
- <SYSTEM32>\winlogon.exe
- <SYSTEM32>\csrss.exe
- <SYSTEM32>\ctfmon.exe
- <SYSTEM32>\svchost.exe
- <SYSTEM32>\lsass.exe
a large number of user processes.
Modifies file system :
Creates the following files:
- %TEMP%\zip.exe
- %TEMP%\rar.exe
- <SYSTEM32>\kdcuj.exe
- %TEMP%\nse3.tmp\modern-header.bmp
- %TEMP%\nse3.tmp\ns4.tmp
- %TEMP%\UnRAR.exe
- %TEMP%\nso2.tmp
- %TEMP%\nse3.tmp\nsExec.dll
- %TEMP%\logo.jpg
Deletes the following files:
- %TEMP%\rar.exe
- %TEMP%\zip.exe
- %TEMP%\logo.jpg
- %TEMP%\nse3.tmp\ns4.tmp
- %TEMP%\UnRAR.exe
Network activity:
Connects to:
- '85.##5.121.36':80
TCP:
HTTP GET requests:
- 85.##5.121.36/
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'SysListView32' WindowName: '(null)'
- ClassName: '#32770' WindowName: '(null)'
