Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad] 'Crcss' = '%WINDIR%\crcss.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\autorun.exe
Malicious functions:
Executes the following:
- <SYSTEM32>\netsh.exe firewall add allowedprogram %WINDIR%\crcss.exe TCP ENABLE
Modifies file system :
Creates the following files:
Network activity:
Connects to:
- 'ir#.#izon.net':6667
UDP:
- DNS ASK ir#.#izon.net