Difference between revisions of "Trojan Horse"

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(Description)
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==Description==
 
==Description==
  
A Trojan Horse is a program that uses malicious code masqueraded as a trusted application. The malicious code can be injected on benign applications, masqueraded in e-mails links or sometimes hidden in JavaScript  pages to make furtive attacks against vulnerable internet Browsers.
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A Trojan Horse is a program that uses malicious code masqueraded as a trusted application. The malicious code can be injected on benign applications, masqueraded in e-mail links, or sometimes hidden in JavaScript  pages to make furtive attacks against vulnerable internet Browsers.
  
Other details can be found on [[Man-in-the-browser attack]].
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Other details can be found in [[Man-in-the-browser attack]].
  
'''The 7 main types of Trojan Horse'''
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===The 7 Main Types of Trojan Horse===
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# '''Remote Access Trojan (RAT):''' Designed to provide the attacker full control of the infected machine. Trojan horse usually masqueraded as a utility.
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# '''Data Sending Trojan:''' Trojan horse that uses keylogger technology to capture sensitive data like passwords, credit card and banking information, and IM messages, and sends them back to the attacker.
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# '''Destructive Trojan:''' Trojan horse designed to destroy data stored on the victim’s computer.
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# '''Proxy Trojan:''' Trojan horse that uses the victim's computer as a proxy server, providing the attacker an opportunity to execute illicit acts from the infected computer, like banking fraud, and even malicious attacks over the internet.
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# '''FTP Trojan:''' This type of Trojan horse uses the port 21 to enable the attackers to connect to the victim's computer using File Transfer Protocol.
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# '''Security software disabler Trojan:''' This Trojan horse is designed to disable security software like firewall and antivirus, enabling the attacker to use many invasion techniques to invade the victim's computer, and even to infect more than the computer.
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# '''Denial-of-Service attack Trojan:''' Trojan horse designed to give the attacker opportunity to realize Denial-of-Service attacks from victim's computer.
  
1.Remote Access Trojan (RAT)
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===Symptoms===
  
Designed to provide the attacker full control of the infected machine. Trojan horse usually masqueraded as a utility.
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Some common symptoms:
  
2.Data Sending Trojan
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* Wallpaper and other background settings auto-changing
 
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* Mouse pointer disappears
Trojan horse that uses keylogger technology to capture sensitive data like passwords, credit card and banking information, IM messages, and send back to attacker.
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* Programs auto-loading and unloading
 
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* Strange window warnings, messages and question boxes, and options being displayed constantly
3.Destructive Trojan
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* e-mail client auto sending messages to all on the user's contacts list
 
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* Windows auto closing
Trojan horse designed to destroy data stored on victim’s computer.
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* System auto rebooting
 
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* Internet accounts information changing
4.Proxy Trojan
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* High internet bandwidth being used without user action
 
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* Computer's high resources consumption (computer slows down)
Trojan horse that uses the victim´s computer as a proxy server, providing the attacker an opportunity to execute illicit acts from the infected computer, like banking fraud, and even malicious attacks over the internet.
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* Ctrl + Alt + Del stops working
 
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5.FTP Trojan
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This type of Trojan horse uses the port 21 to enable the attackers to connect to the victim´s computer using File Transfer Protocol.
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6.Security software disabler Trojan
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The Trojan horse is designed to disable security software like firewall and antivirus, enabling the attacker to use many invasion techniques to invade the victim's computer, and even to infect more than the computer.
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7.Denial-of-Service attack Trojan
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Trojan horse designed to give the attacker opportunity to realize Denial-of-Service attacks from victim´s computer.
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'''Symptoms'''
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A list of common symptoms is described in this section.
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•Wallpaper and other background settings auto changing
+
 
+
•Mouse pointer disappear
+
 
+
•Programs auto loading and unloading
+
 
+
•Strange windows warnings, messages and question box, and options being displayed constantly
+
 
+
•e-mail client auto sending messages to all user's contacts list
+
 
+
•Windows auto closing
+
 
+
•System auto rebooting
+
 
+
•Internet accounts information changing
+
 
+
•High internet bandwidth being used without user action
+
 
+
•Computer's high resources consumption (computer slows down)
+
 
+
•Ctrl + Alt + Del stops working
+
  
 
== Risk Factors==
 
== Risk Factors==

Revision as of 07:48, 15 September 2008

This is an Attack. To view all attacks, please see the Attack Category page.



ASDR Table of Contents

Contents


Description

A Trojan Horse is a program that uses malicious code masqueraded as a trusted application. The malicious code can be injected on benign applications, masqueraded in e-mail links, or sometimes hidden in JavaScript pages to make furtive attacks against vulnerable internet Browsers.

Other details can be found in Man-in-the-browser attack.

The 7 Main Types of Trojan Horse

  1. Remote Access Trojan (RAT): Designed to provide the attacker full control of the infected machine. Trojan horse usually masqueraded as a utility.
  2. Data Sending Trojan: Trojan horse that uses keylogger technology to capture sensitive data like passwords, credit card and banking information, and IM messages, and sends them back to the attacker.
  3. Destructive Trojan: Trojan horse designed to destroy data stored on the victim’s computer.
  4. Proxy Trojan: Trojan horse that uses the victim's computer as a proxy server, providing the attacker an opportunity to execute illicit acts from the infected computer, like banking fraud, and even malicious attacks over the internet.
  5. FTP Trojan: This type of Trojan horse uses the port 21 to enable the attackers to connect to the victim's computer using File Transfer Protocol.
  6. Security software disabler Trojan: This Trojan horse is designed to disable security software like firewall and antivirus, enabling the attacker to use many invasion techniques to invade the victim's computer, and even to infect more than the computer.
  7. Denial-of-Service attack Trojan: Trojan horse designed to give the attacker opportunity to realize Denial-of-Service attacks from victim's computer.

Symptoms

Some common symptoms:

  • Wallpaper and other background settings auto-changing
  • Mouse pointer disappears
  • Programs auto-loading and unloading
  • Strange window warnings, messages and question boxes, and options being displayed constantly
  • e-mail client auto sending messages to all on the user's contacts list
  • Windows auto closing
  • System auto rebooting
  • Internet accounts information changing
  • High internet bandwidth being used without user action
  • Computer's high resources consumption (computer slows down)
  • Ctrl + Alt + Del stops working

Risk Factors

High

A Trojan horse can break througt all the security polices in a network, because a attacker can get access to a WorkStation that can have network credentials stored in. With this credentials a attacker can compromise all the network.


Examples

A Javascript Trojan Horse example can be found on: http://www.attacklabs.com/download/sniffer.rar .

An iframe pointing to a javascript which downloads malware: http://isc.sans.org/diary.html?storyid=2923&dshield=4c501ba0d99f5168ce114d3a3feab567


Related Threat Agents

Related Attacks

Related Vulnerabilities

  • TBD

Related Controls

  • TBD

References