Update Date
02/10/2024

Class: WebToolbar

Toolbars enhance the capabilities of user software and are installed with the user’s consent. They are not malicious. However, some toolbars are installed along with other software components. These toolbars make use of special installers that employ a variety of methods to automatically receive permission to install a toolbar, e.g. flagging an “I agree” option by default. In order to warn users about attempts to install unwanted content, we detect as WebToolbar any toolbars being installed on users’ computers without their permission as well as the associated toolbar installers.

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Platform: Win32

Win32 is an API on Windows NT-based operating systems (Windows XP, Windows 7, etc.) that supports execution of 32-bit applications. One of the most widespread programming platforms in the world.

Family: WebToolbar.Win32.MultiBarDownloader.nfqx

No family description

Examples

AA4DCC8D88714B69218243908BB53465
CF0CF35DCE8B2A613A9C6BF522CFD3F7
5C09FC0991AEF03CA503F0164074C2A3
CC81E5D6DA5750C6EF3283CA4A92C2E3
403E2B90F66D9C856FCD44349EEDB4AE

Tactics and Techniques: Mitre*

TA0004
Privilege Escalation

Adversaries may modify access tokens to operate under a different user or system security context to perform actions and bypass access controls. Windows uses access tokens to determine the ownership of a running process. A user can manipulate access tokens to make a running process appear as though it is the child of a different process or belongs to someone other than the user that started the process. When this occurs, the process also takes on the security context associated with the new token.


T1134
Access Token Manipulation

Adversaries may modify access tokens to operate under a different user or system security context to perform actions and bypass access controls. Windows uses access tokens to determine the ownership of a running process. A user can manipulate access tokens to make a running process appear as though it is the child of a different process or belongs to someone other than the user that started the process. When this occurs, the process also takes on the security context associated with the new token.


TA0005
Defense Evasion

Adversaries may modify access tokens to operate under a different user or system security context to perform actions and bypass access controls. Windows uses access tokens to determine the ownership of a running process. A user can manipulate access tokens to make a running process appear as though it is the child of a different process or belongs to someone other than the user that started the process. When this occurs, the process also takes on the security context associated with the new token.


T1134
Access Token Manipulation

Adversaries may modify access tokens to operate under a different user or system security context to perform actions and bypass access controls. Windows uses access tokens to determine the ownership of a running process. A user can manipulate access tokens to make a running process appear as though it is the child of a different process or belongs to someone other than the user that started the process. When this occurs, the process also takes on the security context associated with the new token.


TA0011
Command and Control

Adversaries may communicate using application layer protocols associated with web traffic to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.


T1071.001
Web Protocols

Adversaries may communicate using application layer protocols associated with web traffic to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.


* © 2025 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

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