Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'system' = '<SYSTEM32>\system.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\AutoRun.vbs
- <Drive name for removable media>:\AutoRun.inf
Malicious functions:
Executes the following:
- <SYSTEM32>\rundll32.exe <SYSTEM32>\system.dll Export
- <SYSTEM32>\cacls.exe <SYSTEM32> /e /p everyone:f
Hooks the following functions in System Service Descriptor Table (SSDT):
- NtCreateProcessEx, handler: peios.sys
Hides the following processes:
- <SYSTEM32>\wbem\wmiprvse.exe
Modifies file system :
Creates the following files:
- C:\AutoRun.vbs
- C:\system.exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\count[1].txt
- <DRIVERS>\peios.sys
- <SYSTEM32>\system.dll
- C:\AutoRun.inf
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\system.exe
- C:\system.exe
Deletes the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\count[1].txt
Moves itself:
- from <Full path to virus> to <SYSTEM32>\system.exe
Network activity:
Connects to:
- 'l2#.#o123.info':80
TCP:
HTTP GET requests:
- l2#.#o123.info/12/count.txt
UDP:
- DNS ASK l2#.#o123.info
