Win32.HLLW.Autohit.13443

Added to the Dr.Web virus database: 2013-09-01

Virus description added: 2013-09-15

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe csrcs.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'csrcs' = '<SYSTEM32>\csrcs.exe'

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

Creates and executes the following:

Executes the following:

Modifies file system :

Creates the following files:

%TEMP%\~ip.tmp
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\checkip.dyndns[1].481769003
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\n09230945[1].asp
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\whatismyip[1].8623831107
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\whatismyip[1].6030509213
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\checkip.dyndns[1].1252976204
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\n09230945[1].asp
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\n09230945[1].asp
<SYSTEM32>\csrcs.exe
%TEMP%\hdmmwcb
%TEMP%\aut1.tmp
%TEMP%\aut2.tmp
<SYSTEM32>\autorun.inf
%TEMP%\suicide.bat
%TEMP%\xcirumm

Sets the 'hidden' attribute to the following files:

Deletes the following files:

%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\n09230945[1].asp
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\n09230945[1].asp
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\n09230945[1].asp
%TEMP%\~ip.tmp
%TEMP%\hdmmwcb
%TEMP%\aut1.tmp
%TEMP%\xcirumm
%TEMP%\aut2.tmp

Deletes itself.

Network activity:

Connects to:

TCP:

HTTP GET requests:

UDP: