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Backdoor:Win32/Bifrose.ES

First posted on 09 May 2019.
Source: Microsoft

Aliases :

There are no other names known for Backdoor:Win32/Bifrose.ES.

Explanation :

Backdoor:Win32/Bifrose.ES allows unauthorized access and control of an affected computer. Installation When executed, Backdoor:Win32/Bifrose.ES copies itself to drivers001driver.exe.
Note: refers to a variable location that is determined by the malware by querying the Operating System. The default installation location for the System folder for Windows 2000 and NT is C:WinntSystem32; and for XP, Vista, and 7 is C:WindowsSystem32.
As a part of its installation process, the malware may modify the following registry entry in order to run at system start:
Adds value: StubPath
With data: "c:windowssystem32drivers001driver.exe s"
To subkey: hklmsoftwaremicrosoftactive setupinstalled components{9fa48854-5f30-2c89-a66f-1c13ba9404cc}
The malware creates the following files on an affected computer:
c:documents and settingsadministratorapplication dataaddons.dat
The malware utilizes code injection in order to hinder detection and removal. When Backdoor:Win32/Bifrose.ES executes, it may inject code into running processes, including the following, for example:

explorer.exe IEXPLORE.EXE
Payload Modifies browser settings Backdoor:Win32/Bifrose.ES modifies the affected computer's browser settings by making the following changes to the registry:

The malware locks the Internet Explorer toolbar by making the following registry modification:

Adds value: "Locked"
With data: "1"
To subkey: HKCUSoftwareMicrosoftInternet ExplorerToolbar
Allows backdoor access and control The malware allows unauthorized access and control of an affected computer. An attacker can perform any number of different actions on an affected computer using Backdoor:Win32/Bifrose.ES. This could include, but is not limited to, the following actions:
Download and execute arbitrary files Upload files Spread to other computers using various methods of propagation Log keystrokes or steal sensitive data Modify system settings Run or terminate applications Delete files
This malware description was produced and published using our automated analysis system's examination of file SHA1 53be5aa3747d5f0d9bd547f75ad5ecf996375400.

Last update 09 May 2019

 

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