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Backdoor:Win32/Xtrat.AC

First posted on 12 May 2019.
Source: Microsoft

Aliases :

There are no other names known for Backdoor:Win32/Xtrat.AC.

Explanation :

Installation This threat can create files on your PC, including:
%APPDATA%microsoftwindowspkawfzt4b.dat system32csrrs.exe

It modifies the registry so that it runs each time you start your PC. For example:

In subkey: HKCUSoftwareMicrosoftWindowsCurrentVersionRun
Sets value: "HKCU"
With data: "system32csrrs.exe"
In subkey: HKLMSoftwareMicrosoftActive SetupInstalled Components{CM2500K2-6UH8-U4EA-FTI1-E634D18GQ6T5}
Sets value: "StubPath"
With data: "system32csrrs.exe restart"
In subkey: HKLMSoftwareMicrosoftWindowsCurrentVersionRun
Sets value: "HKLM"
With data: "system32csrrs.exe"

The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.

Payload

Allows backdoor access and control

This threat can give a malicious hacker access and control of your PC. They can then perform a number of different actions, such as:

Deleting files Downloading and running files Logging your keystrokes or stealing your sensitive data Modifying your system settings Running or stopping applications Spreading malware to other PCs Uploading files

Connects to a remote host

We have seen this threat connect to a remote host, including: profesorjedi8.myftp.biz using port 3700 Malware can connect to a remote host to do any of the following: Check for an Internet connectionDownload and run files (including updates or other malware)Report a new infection to its authorReceive configuration or other dataReceive instructions from a malicious hackerSearch for your PC locationUpload information taken from your PCValidate a digital certificate

Additional information

Creates a mutex

This threat can create one or more mutexes on your PC. For example:

PkAwfZT4b PkAwfZT4bPERSIST XTREMEUPDATE

It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.

This malware description was published using automated analysis of file SHA1 091f4f346193643b179c653ff792f20444fa0d7d.

Last update 12 May 2019

 

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