TSPY_ZBOT.THX

This is the Trend Micro detection for KINS Trojan, dubbed as the next ZeuS by media reports. Similar to ZeuS/ZBOT, it downloads configuration file and steals online banking credentials. However, it uses a different packer and has anti-debugging and anti-analysis routines.

To get a one-glance comprehensive view of the behavior of this Spyware, refer to the Threat Diagram shown below.

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 modifies registry entries to disable the Windows Firewall settings. This action allows this malware to perform its routines without being deteted by the Windows Firewall.

As of this writing, the said sites are inaccessible.

It deletes the initially executed copy of itself.

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:

• %Application Data%\{random folder name 1}\{random file name 1}.exe

(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It drops the following files:

• %Application Data%\{random folder name 2}\{random file name 2}.{random file extension} - contains encrypted stolen information

(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It creates the following folders:

• %Application Data%\{random folder name 1}
• %Application Data%\{random folder name 2}

(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

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

• Global\{GUID}
• Local\{GUID}

It injects threads into the following normal process(es):

• explorer.exe

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 file name 1}.exe = "%Application Data%\{random folder name 1}\{random file name 1}.exe"

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
{random}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
{random}
{random string} = "{random hex values}"

It modifies the following registry entries to disable the Windows Firewall settings:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Windows%\explorer.exe = "%Windows%\explorer.exe:*:Enabled:Windows Explorer"

Download Routine

This spyware connects to the following URL(s) to download its configuration file:

• https://{BLOCKED}linker.net/temperdata/sdg12s.bin
• http://{BLOCKED}mmj.com/cfg.bin

As of this writing, the said sites are inaccessible.

Information Theft

This spyware gathers the following data:

• Data on Cookie files (URLs)
• Email-related information such as account names, email addresses, passwords, server data, and server port

Other Details

This spyware connects to the following URL(s) to check for an Internet connection:

• http://www.google.com/webhp

It deletes the initially executed copy of itself

NOTES:
The configuration file may contain URLs where it downloads an updated copy of itself and where it sends its gathered information. It may also contain URLs of its target online banking and finance-related sites from where it steals the information.

Here are some of its anti-analysis techniques.

• It checks for the following files:
• C:\TOOLS\execute.exe
• C:\popupkiller.exe
• SbieDll.dll
• \\.\HGFS
• \\.\NPF_NdisWanIp
• \\.\VboxGuest
• It checks for the following registry keys:

HKEY_LOCAL_MACHINE\Software\Wine

HKEY_CURRENT_USER\Software\Wine

• It checks for the following mutex:
• Frz_State