Win32.Initx
Initx is a harmless per-process resident Win32 virus. It infects Windows Portable executable (PE) files that have the ".EXE" filename extension. The virus consists of two parts: its startup routine stored in infected files, and the dynamic link library (DLL) file called "initx.dat".
Replication
The virus searches for suitable files with the ".EXE" extension in the Windows and Windows System directories, and all computer's network shares and tries to infect them. If the computer's name begins with "CT" in any case, the virus replicates only in the shared directories.
While infecting a file, the virus creates its copy named "initx.dat" in the host's directory. Then it appends its 28 byte long startup routine to the host's code section, so that the "initx.dat" file is loaded as a library when an infected file is executed. The startup routine is inserted in the unused space of the code section, so the file's size remains unchanged.
The infection process looks like this:
Infected directory
Victim directory
------------------
----------------
file1
file4
file2
file5
...
...
infected file.exe
host.exe <---
is infected by
writing the startup
routine (28 bytes)
to the code section
initx.dat
--> initx.dat
<--- copy of the main
part of the virus
Payload
The virus tries to find and to connect to the network host called
"ct". If the connection is successfull, it transmits the infected computer's
name to that host. It also creates a hidden network share with the "ADMIN$"
name that points to the Windows directory.
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