TSPY_BISTY.A

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 does not have any proxy server routine.

It gathers certain information on the affected computer.

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

• %Windows%\fxsst.dll - also detected as TSPY_BISTY.A

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

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:

• 2009-v11

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

• SVCHOST.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"

Other System Modifications

This spyware adds the following registry keys:

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

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.

Proxy Server Routine

This spyware does not have any proxy server routine.

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:

• {BLOCKED}i.zyns.com

However, as of this writing, the said sites are inaccessible.

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.