When the worm's file is run, it copies itself as 'svchost.com'
to Windows System folder and creates a startup key for this file
in the Registry:
"_svchost.con" = "%SystemDir%\svchost.com"
%SystemDir% represents the Windows System folder name, for
example C:\Windows\System32 on Windows XP systems.
Another copy is created in the same directory as 'svchost.con'.
Zafi.C keeps its state information in the registry under
Zafi.C collects email addresses from Windows Address Book and
different files (eg. HTM, TXT, MBX, etc).
The worm composes the messages it sends based on complex rules
in many different languages. The email attachments might have
double extensions (composed from .DOC/.TXT and .EXE/.SCR).
The payload of Zafi.C is a Distributed Denial-of-Service attack
Detection for this malware was published on October 27th, 2004
in the following F-Secure Anti-Virus updates:
F-Secure Antivirus Research Team, October 27th, 2004;