Zafi.C is a variant of the Zafi mass-mailing worm family. This worm sends email messages with infected attachments in several different languages.
The payload of Zafi.C is a Distributed Denial-of-Service attack against google.com, microsoft.com and www.miniszterelnok.hu.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
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:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] "_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 against
google.com microsoft.com www.miniszterelnok.hu
Detection for this malware was published on October 27th, 2004
in the following F-Secure Anti-Virus updates:
Detection Type: PC
Description Created: F-Secure Antivirus Research Team, October 27th, 2004