Virus Profile: Exploit-ByteVerify

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 4/9/2003
Date Added: 4/22/2003
Origin: N/A
Length: Varies
Type: Trojan
Subtype: Exploit
DAT Required: 4258
Removal Instructions


This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Indication of Infection

There are no obvious signs of infection. AVERT has received field samples that use this exploit to create a registry script file, and merge it into the system registry. This script simply altered the default start page of Internet Explorer.

Methods of Infection

This exploit makes use of a security vulnerability affecting Internet Explorer and certain email clients, such as Outlook and Outlook Express.

Virus Characteristics

This detection covers Java applets that attempt to exploit the Microsoft Security Bulletin MS03-011 vulnerability. The severity of this vulnerability is considered to be critical. It allows an attacker to execute malicious code, simply by visiting an infectious website. Detections of this exploit do not necessarily mean that any malicious code was executed. It simply means that a Java applet was found to contain the exploit code. Conversely malicious code may have been run, which could result in any number of modifications to the system.

All vulnerable systems should apply the patch from Microsoft. Patched systems are immune from the effects of the exploit code. However, detection will still occur on files attempting to make use of this exploit.

All Users:
Use current engine and DAT files for detection. Delete any file which contains this detection.

Additional Windows ME/XP removal considerations


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