Trojan.DownLoader3.722

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Inoyikotadoqev' = 'rundll32.exe "%WINDIR%\pnhentl.dll",Startup'
[<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\3284179632] 'Name' = '%TEMP%\5.tmp'

Malicious functions:

Creates and executes the following:

'%TEMP%\wysydg.exe'
'%TEMP%\fpasu.exe'
'%TEMP%\cweec.exe'
'%TEMP%\rrqc.exe'
'%TEMP%\utncnw.exe'
'%TEMP%\navqb.exe'
'%TEMP%\ghvgqgel.exe'
'%TEMP%\jwpw.exe'
'%TEMP%\rbuvxx.exe'
'%TEMP%\ccro.exe'
'%TEMP%\nsw3.tmp\2IC.exe'
'%TEMP%\-1998166001'
'%TEMP%\esqto.exe'
'%TEMP%\nsw3.tmp\6tbp.exe'
'%TEMP%\nsw3.tmp\3E4U - Bucks.exe'
'%TEMP%\nsw3.tmp\e4u.exe'
'%TEMP%\nsw3.tmp\1EuroP.exe'
'%TEMP%\ghvgqgel.exe' (downloaded from the Internet)
'%TEMP%\navqb.exe' (downloaded from the Internet)
'%TEMP%\rbuvxx.exe' (downloaded from the Internet)
'%TEMP%\jwpw.exe' (downloaded from the Internet)
'%TEMP%\cweec.exe' (downloaded from the Internet)
'%TEMP%\-1998166001' (downloaded from the Internet)
'%TEMP%\esqto.exe' (downloaded from the Internet)
'%TEMP%\ccro.exe' (downloaded from the Internet)
'%TEMP%\fpasu.exe' (downloaded from the Internet)
'%TEMP%\utncnw.exe' (downloaded from the Internet)
'%TEMP%\rrqc.exe' (downloaded from the Internet)
'%TEMP%\wysydg.exe' (downloaded from the Internet)

Executes the following:

'<SYSTEM32>\rundll32.exe' "%WINDIR%\pnhentl.dll",iep
'<SYSTEM32>\svchost.exe'
'<SYSTEM32>\rundll32.exe' "%WINDIR%\pnhentl.dll",Startup

Injects code into

the following system processes:

<SYSTEM32>\svchost.exe
%WINDIR%\Explorer.EXE
<SYSTEM32>\spoolsv.exe

Modifies settings of Windows Internet Explorer:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1400' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] 'currentlevel' = '00000000'

Modifies file system :

Creates the following files:

%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\hhlycptx[1].php
%TEMP%\utncnw.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\lyyyzdduh[1].php
%TEMP%\jwpw.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\bosgwxbeff[1].php
%TEMP%\wysydg.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\vvvmmddhvl[1].php
%TEMP%\fpasu.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\scctgxkbb[1].php
%TEMP%\Aqz..bat
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\kxyyp[1].php
%WINDIR%\ukijegig.dll
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\CAC9QNCP.php
%TEMP%\ghvgqgel.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\ivjwneei[1].php
%TEMP%\rbuvxx.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\wjwwnae[1].php
%TEMP%\navqb.exe
%TEMP%\rrqc.exe
%TEMP%\4.tmp
%TEMP%\nsw3.tmp\6tbp.exe
%WINDIR%\Temp\6.tmp
%WINDIR%\pnhentl.dll
%TEMP%\nsw3.tmp\3E4U - Bucks.exe
%TEMP%\nsw3.tmp\e4u.exe
%TEMP%\nsq2.tmp
%TEMP%\nsw3.tmp\2IC.exe
%TEMP%\nsw3.tmp\1EuroP.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\nnrfjmqeh[1].php
%TEMP%\ccro.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\sbsfwao[1].php
%TEMP%\cweec.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\lmzdd[1].php
%TEMP%\esqto.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\uhhymdqu[1].php
%TEMP%\-1998166001
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\vvvjzar[1].php

Deletes the following files:

<DRIVERS>\etc\hosts
%TEMP%\5.tmp
<SYSTEM32>\svchost.exe
%WINDIR%\Temp\6.tmp
%TEMP%\nsw3.tmp\e4u.exe
%TEMP%\nsw3.tmp\2IC.exe
%TEMP%\nsw3.tmp\1EuroP.exe
%TEMP%\nsw3.tmp\6tbp.exe
%TEMP%\nsw3.tmp\3E4U - Bucks.exe

Moves the following files:

from %TEMP%\4.tmp to %TEMP%\5.tmp

Network activity:

Connects to:

'06######0420.dynambu.net':80
'localhost':1040
'aa###lic.com':80

TCP:

HTTP GET requests:

aa###lic.com/bdqqu/lyyyzdduh.php?ad####################################
aa###lic.com/bdqqu/hhlycptx.php?ad####################################
aa###lic.com/bdqqu/bosgwxbeff.php?ad####################################
aa###lic.com/bdqqu/kxyyp.php?ad##################################################################
aa###lic.com/bdqqu/wjwwnae.php?ad####################################
aa###lic.com/bdqqu/ivjwneei.php?ad####################################
aa###lic.com/bdqqu/scctgxkbb.php?ad####################################
aa###lic.com/bdqqu/lmzdd.php?ad####################################
aa###lic.com/bdqqu/vvvjzar.php?ad####################################
aa###lic.com/bdqqu/uhhymdqu.php?ad####################################
aa###lic.com/bdqqu/vvvmmddhvl.php?ad####################################
aa###lic.com/bdqqu/sbsfwao.php?ad####################################
aa###lic.com/bdqqu/nnrfjmqeh.php?ad####################################