Troj/Vipgsm-K

Aliases	Trojan-PSW.Win32.Vipgsm.as BKDR_VIPGSM.C
Category	Viruses and Spyware
Type	Trojan
What to do	If you've received an alert for a virus or spyware, then follow the instructions for removing the threat.
Prevalence	low high

Summary


Affected operating systems	Windows
Characteristics	Installs itself in the registry
Included in our products from	November 2005 (3.99)
Protection available since	12 October 2005 02:03:06 (GMT)
Detected by	All Sophos products

Troj/Vipgsm-K is a keylogger and password stealing Trojan for the Windows platform.

Troj/Vipgsm-K includes functionality to access the internet and communicate with a remote server via HTTP.

When first run Troj/Vipgsm-K copies itself to <System>\mstcpmon.exe and creates the following files:

<System>\chkdskw.exe
<System>\itstore.dll
<System>\karnal32.dll
<System>\mslogon.dll
<System>\mswshell.dll

These files are all detected as Troj/Vipgsm-K.

The following registry entries are created to run code exported by <System>\mswshell.dll on startup:

HKCR\CLSID\(random GUID)\InProcServer32
(default)
"mswshell.dll"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
ShellServiceObjectDelayLoad\
Shell
"(random GUID)"

The following line is added to the [chkdsk] section of Win.ini to run chkdsk on startup:
checked = 1

The infected computer's hosts file is also modified so as to deny access to security related websites.

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