TSPY_ZBOT.OET

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

It deletes itself after execution.

Arrival Details

This spyware 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 spyware drops the following copies of itself into the affected system:

• %User Temp%\{random folder name}\{random file name}.exe
• %User Profile%\{random folder name}\{random file name}.exe
• %Application Data%\{random folder name}\{random file name}.exe
• %System Root%\{random folder name}\{random file name}.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It creates the following folders:

• %User Temp%\{random folder name}
• %User Profile%\{random folder name}
• %Application Data%\{random folder name}
• %System Root%\{random folder name}

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random letters} = "{folder/directory used}\{random folder name}\{random file name}.exe"

Other Details

This spyware connects to the following possibly malicious URL:

• http://www.{BLOCKED}u.com/ld/a.php
• http://www.{BLOCKED}amj.com/ld/a.php
• http://www.{BLOCKED}a-list.com/ld/a.php
• http://www.{BLOCKED}ure.com/ld/a.php
• http://www.{BLOCKED}hop.com/ld/a.php

It deletes itself after execution.

NOTES:

It only drops one copy of itself. It chooses from the ones stated above.

{directory/folder used} is where the malware chose to drop its copy.