TrojanSpy.MSIL.CLIPBANKER.AO

This Trojan Spy 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 Spy 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 Spy adds the following folders:

• %AppDataLocal%\Get_Cliboard_Address
• %AppDataLocal%\Get_Cliboard_Address\{Malware Filename}_Url_{32 Random Alphanumeric Characters}
• %AppDataLocal%\Get_Cliboard_Address\{Malware Filename}_Url_{32 Random Alphanumeric Characters}\1.0.0.0

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

It drops the following copies of itself into the affected system:

• %User Temp%\{Malware Filename}.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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It drops the following files:

• %AppDataLocal%\Get_Cliboard_Address\{Malware Filename}_Url_{32 Random Alphanumeric Characters}\1.0.0.0\{Random Characters}.tmp -> Deleted afterwards
• %AppDataLocal%\Get_Cliboard_Address\{Malware Filename}_Url_{32 Random Alphanumeric Characters}\1.0.0.0\user.config -> configuration file
  • originally %AppDataLocal%\Get_Cliboard_Address\{Malware Filename}_Url_{32 Random Alphanumeric Characters}\1.0.0.0\{Random Characters}.newcfg
• %System Root%\log.txt -> log file where activities are stored

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local 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.)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• Global\{Malware Path}//{Malware Filename}.exe

Autostart Technique

This Trojan Spy modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WindowsUpdater = %User Temp%\{Malware Filename}.exe

It drops the following file(s) in the Startup Items folder to enable its automatic execution at every system startup:

• %User Startup%\{Malware Filename}.exe
• %User Startup%\WindowsUpdater.lnk -> if unable to drop file copy in Startup folder (points to %User Temp%\{Malware Filename}.exe)

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Information Theft

This Trojan Spy gathers the following data:

• Clipboard Data
• Key Logs

Other Details

This Trojan Spy does the following:

• It modifies its file attributes to Hidden and System
• If another instance of the malware is running, it drops %System Root%\log.txt with the following contents:
  • "instance is already running"
• Stolen data are saved when the current date is later than the date the malware was executed

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