TSPY_BISTY.SM

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 does not have any propagation routine.

It does not have any backdoor routine.

It does not have any downloading capability.

It gathers certain information on the affected computer.

It connects to certain websites to send and receive information. 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 file(s)/component(s):

• %Windows%\fxsst.dll - also detected as TSPY_BISTY.SM
• %User Temp%\SYSTEM {random number} - also detected as TSPY_BISTY.SM

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %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.)

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

• %Program Files%\Internet Explorer\IeCheck.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

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

• Global\2009-v11

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

• SVCHOST.EXE
• EXPLORER.EXE

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{e3df6b419d1F}
StubPath = "%Program Files%\Internet Explorer\IeCheck"

It drops the following shortcut pointing to its copy in the User Startup folder to enable its automatic execution at every system startup:

• %User Startup%\IExplore.lnk

(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, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

Other System Modifications

This spyware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{e3df6b419d1F}

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\MediaResources\msvideo

HKEY_CURRENT_USER\Software\Google

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Google
ActiveSettings = "{hex values}"

Propagation

This spyware does not have any propagation routine.

Backdoor Routine

This spyware does not have any backdoor routine.

Process Termination

This spyware terminates processes or services that contain any of the following strings if found running in the affected system's memory:

• 360sd.exe
• 360tray.exe
• ashServ.exe
• Avast
• avgrsx.exe
• avp.exe
• ccSvcHst.exe
• ekrn.exe
• FProt
• FProtTray.exe
• KAVsvc.exe
• KVwsc.exe
• Mcafee
• Mcshield.exe
• MPMon.exe
• NOD32
• nod32krn.exe
• nscsrvce.exe
• RavMon.exe
• ravtask.exe
• rising.exe
• RsTray.exe
• rtvscan.exe
• sched.exe
• SfCtlCom.exe
• UfNavi.exe
• UfSeAgnt.exe
• 360Safe

Download Routine

This spyware does not have any downloading capability.

Information Theft

This spyware gathers the following information on the affected computer:

• HTTP Password
• HTTP Server URL
• HTTP User
• IMAP Password
• IMAP Server
• IMAP User
• POP3 Password
• POP3 Server
• POP3 User
• SMTP Email Address
• SMTP Server

Other Details

This spyware connects to the following website to send and receive information:

• fbi.{BLOCKED}z.com
• mf.{BLOCKED}s.info
• av.{BLOCKED}s.us
• ls.{BLOCKED}tp.com

It deletes the initially executed copy of itself

NOTES:
This spyware logs keystrokes every time an affected user browse the internet using Internet Explorer.

It does not have rootkit capabilities.

It does not exploit any vulnerability.