Trojan.DownLoader4.10021

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 't5yzubv' = '%APPDATA%\f2u92w.exe'
[<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\804236680] 'Name' = '"%TEMP%\5.tmp"'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Sxikihuvuw' = 'rundll32.exe "%WINDIR%\cebdsi.dll",Startup'

Malicious functions:

Creates and executes the following:

Executes the following:

<SYSTEM32>\sc.exe config SharedAccess start= DISABLED
<SYSTEM32>\net.exe stop "Windows Firewall/Internet Connection Sharing (ICS)"
<SYSTEM32>\net1.exe stop "Windows Firewall/Internet Connection Sharing (ICS)"
<SYSTEM32>\rundll32.exe setupapi,InstallHinfSection DefaultInstall 128 %APPDATA%\mdinstall.inf
<SYSTEM32>\net1.exe stop "Security Center"
<SYSTEM32>\rundll32.exe "%WINDIR%\cebdsi.dll",Startup
<SYSTEM32>\svchost.exe
<SYSTEM32>\rundll32.exe "%WINDIR%\cebdsi.dll",iep
<SYSTEM32>\sc.exe config wscsvc start= DISABLED
<SYSTEM32>\net.exe stop "Security Center"

Injects code into

the following system processes:

Modifies settings of Windows Internet Explorer:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1A10' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '{AEBA21FA-782A-4A90-978D-B72164C80120}' = ''
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '{A8A88C49-5EB2-4990-A1A2-0876022C854F}' = ''
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] 'currentlevel' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1400' = '00000000'

Modifies file system :

Creates the following files:

%APPDATA%\f2u92w.exe
%TEMP%\hodwarf.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\ULU3YH2D\sjwxkob[1].php
%TEMP%\Rlb..bat
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\SL6TKFAX\dhdhuy[1].php
%TEMP%\cpbdrxur.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\ULU3YH2D\oobbff[1].php
%TEMP%\pshha.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\SL6TKFAX\xtkkbspt[1].php
%TEMP%\iycclejs.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\ivzqmqd[1].php
%TEMP%\xqcwsah.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\arboobnkar[1].php
%APPDATA%\mdinstall.inf
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\ULU3YH2D\qqqriimq[1].php
%TEMP%\yttwulhw.exe
%APPDATA%\MouseDriver.bat
%TEMP%\tcomfpag.exe
%TEMP%\nss3.tmp\6tbp.exe
%TEMP%\nss3.tmp\3E4U - Bucks.exe
%TEMP%\4.tmp
%WINDIR%\cebdsi.dll
%TEMP%\nss3.tmp\2IC.exe
%TEMP%\nss3.tmp\bodvddl.exe
%TEMP%\nsh2.tmp
%TEMP%\nss3.tmp\IR.exe
%TEMP%\nss3.tmp\1EuroPn.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\0D6B6PI5\nnbrswmqa[1].php
%TEMP%\qwutu.exe
%WINDIR%\Temp\6.tmp
%TEMP%\nohfx.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\0D6B6PI5\qduhhl[1].php
%TEMP%\mish.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\flcppgggu[1].php
%TEMP%\750234914
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\erfjjje[1].php

Sets the 'hidden' attribute to the following files:

Deletes the following files:

Network activity:

Connects to:

TCP:

HTTP GET requests:

HTTP POST requests:

di##opic.in/?in##############################################################################################################

UDP:

Miscellaneous:

Searches for the following windows: