Technical Information
To ensure autorun and distribution:
Infects the following executable system files:
- <DRIVERS>\beep.sys
Creates the following files on removable media:
- <Drive name for removable media>:\system Volume Information\com1.{21ec2020-3aea-1069-a2dd-08002b30309d}\ntldr.pif
- <Drive name for removable media>:\AutoRun.inf
Malicious functions:
Creates and executes the following:
- %TEMP%\mstmpchk.exe
- <SYSTEM32>\msaro.exe
Injects code into
the following user processes:
- msnmsgr.exe
Modifies file system :
Creates the following files:
- <DRIVERS>\FileSystem.sys
- %TEMP%\mstmpchk.exe
- <SYSTEM32>\dllcache\msaro.exe
- %TEMP%\~DFINF542.tmp
- <SYSTEM32>\wbem\msaro.exe
- %TEMP%\boop475.tmp
- <SYSTEM32>\msaro.exe
- %TEMP%\~sqltmp18.hiv
- <SYSTEM32>\smfelf.dll
- <SYSTEM32>\wmsfeu.dll
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\AutoRun.inf
- %TEMP%\~DFINF542.tmp
Deletes the following files:
- %TEMP%\~DFINF542.tmp
- %TEMP%\~sqltmp18.hiv
- %TEMP%\boop475.tmp
Deletes itself.
