Tuesday, April 22, 2008

Phishing Attacks Through Bot Nets to Steal Millions of Dollars Online

Rock Phish attacks account for 50 percent of phishing incidents and have stolen “tens of millions of dollars” from bank accounts. This is the first time crimeware has been used in a Rock Phish attack. The victims of these phishing attacks get their personal data stolen and are infected by the Zeus Trojan, which is even worst for victims.

In 2004 it was the first (and, for a long time, they were the only) gang to employ bot-nets in its phishing infrastructure in order to make the attacks live longer and be more scalable. It also pioneered new techniques in its spam mails so the mail could more easily evade spam filters. Within the past few weeks there has been a new advance — the inclusion of identity theft malware (or Crimeware) into the Rock group’s phishing attacks.

While the term "botnet" can be used to refer to any group of bots, such as IRC bots, the word is generally used to refer to a collection of compromised computers (called zombie computers) running programs, usually referred to as worms, Trojan horses, or backdoors, under a common command and control infrastructure. The majority of these computers are running Microsoft Windows operating systems, but other operating systems can be affected. A botnet's originator (aka "bot herder") can control the group remotely, usually through a means such as IRC, and usually for nefarious purposes. Individual programs manifest as IRC "bots". Often the command and control takes place via an IRC server or a specific channel on a public IRC network. A bot typically runs hidden, and complies with the RFC 1459 (IRC) standard. Generally, the perpetrator of the botnet has compromised a series of systems using various tools (exploits, buffer overflows, as well as others; see also RPC). Newer bots can automatically scan their environment and propagate themselves using vulnerabilities and weak passwords. Generally, the more vulnerabilities a bot can scan and propagate through, the more valuable it becomes to a botnet controller community. The process of stealing computing resources as a result of a system being joined to a "botnet" is sometimes referred to as "scrumping".

Botnets have become a significant part of the Internet, albeit increasingly hidden. Due to most conventional IRC networks taking measures and blocking access to previously-hosted botnets, controllers must now find their own servers. Often, a botnet will include a variety of connections, ranging from dial-up, ADSL and cable, and a variety of network types, including educational, corporate, government and even military networks. Sometimes, a controller will hide an IRC server installation on an educational or corporate site, where high-speed connections can support a large number of other bots. Exploitation of this method of using a bot to host other bots has proliferated only recently, as most script kiddies do not have the knowledge to take advantage of it.

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