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TrojanDropper:VBS/Twexag.A

First posted on 15 February 2019.
Source: Microsoft

Aliases :

TrojanDropper:VBS/Twexag.A is also known as Trojan.MSIL.Zapchast.abytc, BackDoor-FBHS!3B6DC042A945, Troj/dnsauce-B.

Explanation :

Installation This threat can create files on your PC, including:
%TEMP%eset nod 32.exe %TEMP%la.vbs %TEMP% xw45g.exe %USERPROFILE%appdatalocalgqirrtoupt.exe

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

In subkey: HKCUSoftwareMicrosoftWindowsCurrentVersionRun
Sets value: "ba514383fbe3e110a470eabee259caef"
With data: ""%TEMP%eset nod 32.exe" .."
In subkey: HKLMSoftwareMicrosoftWindowsCurrentVersionRun
Sets value: "ba514383fbe3e110a470eabee259caef"
With data: ""%TEMP%eset nod 32.exe" .."

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

Payload

Installs malware or unwanted software

This trojan can install other malware or unwanted software onto your PC.

Connects to a remote host

We have seen this threat connect to a remote host, including: benalipipox.no-ip.biz using port 1177 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

Bypasses firewall

This threat can modify, bypass, or disable your firewall. It can do this by changing your firewall settings, or by adding a new rule so that it, or other applications, aren't detected.

You might need to restore your Windows Firewall settings.

This malware description was published using automated analysis of file SHA1 24dd7142f89715d408140aaef28609635048b757.

Last update 15 February 2019

 

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