Myfip.H is a variant of Myfip family of worms. This variant doesn't
propagate itself. Most likely it is dropped by some other
Myfip.H also has some rootkit functionality. It tries to hide its
process by manipulating operating system kernel data structures.
For being successful, it requires administrator privileges.
Installation to system
When run, the worm copies under %SYSTEM% directory using the name
'kernel32dll.exe'. It creates a mutex named 'Meteo/EA[DCA]'.
It installs the following registry key to ensure it will be
executed next time the system is started:
"Distributed File System" = "kernel32dll.exe"
The worm also creates a thread that adds the above registry
key again if it is deleted.
If the worm is running under Windows NT-based system, it tries
to inject code in address space of Explorer.exe. The injected
code re-executes worm's file if the process terminates. The
implementation seems to be quite unstable and it might crash
Myfib.H collects files from all fixed and remote drives.
The following list of file extensions are collected:
The following directories are skipped:
SYSTEM VOLUME INFORMATION
DOCUMENTS AND SETTINGS
If the worm doesn't find any files, it terminates. The collected
files are sent to remote server at address 'saap.vicp.net', using
on TCP port 34330.
Hiding the process
If the worm is running on Windows NT-based computer, it tries to
hide its process by manipulating kernel data structures. This works
only it worm is run under administrator privileges. If the system
is Win9x-based, the worm tries to hide the process by issuing
Win32 API call 'RegisterServiceProcess'.
Jarkko Turkulainen; Mar 3rd, 2005;