Eng
  1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar


Helvis


Aliases:


Helvis
VBS/Helvis, VBS-Helvis, Halloween Elvis

Malware
Trojan
VBS

Summary

Helvis is a trojan written with Visual Basic Script. The purpose of the trojan is to collect emails from the infected system.



Disinfection & Removal

Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details


Variant:Helvis.A

When this trojan is executed, it opens a web page using Internet Explorer. After opening the web site, the trojan attempts to drop a file to "c:\winnt\profiles\all users\start menu\programs\startup\VirusChecker.vbs". Because the path is hard coded, this file is dropped only in the default Windows NT installations.

Next the trojan collects all mails except a mail with subject "Halloween Elvis" from both inbox and sent mail folders from Outlook. These mails are sent to particular email address that propably belongs to the virus writer. The mail with the subject "Halloween Elvis" is deleted.

The "VirusChecker.vbs" file dropped into startup directory common for all users will be executed when the system restarts. With this file the trojan collects emails from the previous working day only. These mails are collected from user's inbox and sent mail folders and sent to the same email address mentioned above. On that way the trojan continues spying the infected machine.





Technical Details: Katrin Tocheva and Sami Rautiainen; F-Secure Corp.; November 1st, 2002



Submit a sample




Wondering if a file or URL is malicious? Submit a sample to our Lab for analysis via the Sample Analysis System (SAS)

Give And Get Advice




Give advice. Get advice. Share the knowledge on our free discussion forum.

Scan and clean your PC




F-Secure Online Scanner will scan and clean your PC in just a few minutes for free