Zeus

The most widespread botnet in history, ZeuS is a Trojan horse that infiltrates computers in order to steal data by logging keystrokes and spread copies of itself to other devices via instant messaging and e-mail messages. Computers infected by a ZeuS variant can be controlled by the attacker and monitored for keystrokes in order to gain access to online accounts and other sensitive data.

More than 50,000 variants of the ZeuS Trojan have been recognized since ZeuS made its first known appearance in 2007. The most prolific period for ZeuS came in 2009 and 2010, with some security reports estimating as many as 3.6 million ZeuS-infected computers in the United States alone during that time.

Several mobile botnet variants of the ZeuS Trojan have surfaced more recently, with some targeting Google Android phones while others attack Blackberry devices, Symbian phones, or Windows Mobile phones. These variants are considered part of the Zitmo family of mobile malware and are designed to steal the mobile transaction authentication numbers that banks use to strengthen security for logging in to online accounts.

Vangie Beal
Vangie Beal is a freelance business and technology writer covering Internet technologies and online business since the late '90s.

Top Articles

The Complete List of 1500+ Common Text Abbreviations & Acronyms

From A3 to ZZZ we list 1,559 SMS, online chat, and text abbreviations to help you translate and understand today's texting lingo. Includes Top...

Windows Operating System History & Versions

The Windows operating system (Windows OS) refers to a family of operating systems developed by Microsoft Corporation. We look at the history of Windows...

How to Create a Website Shortcut on Your Desktop

Website Shortcut on Your Desktop reviewed by Web Webster   This Webopedia guide will show you how to create a website shortcut on your desktop using...

Generations of Computers (1st to 5th)

Reviewed by Web Webster Learn about each of the 5 generations of computers and major technology developments that have led to the computing devices that...

Pardot

What is Pardot? Pardot is a B2B marketing automation (MA) solution by Salesforce that...

Veeam

Veeam Software is a global vendor...

Akamai

Akamai Technologies is a global web technology company specializing in content...