Trojan.DownLoader16.32501

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Installer Group Upgrade Resolution Agent' = '<SYSTEM32>\ezqtvaluzqcw.exe'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\WebClient AutoConnect Log System] 'Start' = '00000002'

Malicious functions:

To complicate detection of its presence in the operating system,

blocks the following features:

Windows Security Center

Creates and executes the following:

'<SYSTEM32>\czvfgqxi.exe' "<SYSTEM32>\ezqtvaluzqcw.exe"
'%WINDIR%\Temp\col5go2z31qrj.exe' -r 41357 tcp
'%TEMP%\col5go2rpuqrjkyhga2z.exe'
'<SYSTEM32>\ezqtvaluzqcw.exe'

Modifies file system :

Creates the following files:

<SYSTEM32>\ljifaxjsdm\run
<SYSTEM32>\ljifaxjsdm\rng
%WINDIR%\Temp\col5go2z31qrj.exe
<SYSTEM32>\ljifaxjsdm\cfg
<SYSTEM32>\czvfgqxi.exe
%TEMP%\col5go2rpuqrjkyhga2z.exe
<SYSTEM32>\ljifaxjsdm\tst
<SYSTEM32>\ezqtvaluzqcw.exe
<SYSTEM32>\ljifaxjsdm\etc

Sets the 'hidden' attribute to the following files:

<SYSTEM32>\czvfgqxi.exe
<SYSTEM32>\ezqtvaluzqcw.exe

Deletes the following files:

%WINDIR%\Temp\col5go2z31qrj.exe
<DRIVERS>\etc\hosts
%TEMP%\col5go2rpuqrjkyhga2z.exe

Substitutes the HOSTS file.

Network activity:

Connects to:

'bo###lack.net':80
'ga###lack.net':80
'bo###rown.net':80
'ga###rown.net':80
'le###plain.net':80
'fa###lain.net':80
'le###step.net':80
'fa###tep.net':80
'fi###black.net':80
'qu###black.net':80
'fi###grown.net':80
'qu###grown.net':80
'bo###lain.net':80
'ga###lain.net':80
'bo###tep.net':80
'ga###tep.net':80
'le###grown.net':80
'wa###lack.net':80
'st###step.net':80
'wa###rown.net':80
'mo###black.net':80
'we###lain.net':80
'st###grown.net':80
'we###tep.net':80
'st###plain.net':80
'fa###lack.net':80
'mo###step.net':80
'fa###rown.net':80
'le###black.net':80
'wa###lain.net':80
'mo###grown.net':80
'wa###tep.net':80
'mo###plain.net':80
'de###ther.net':80
'sh###wall.net':80
'de###orty.net':80
'sh###other.net':80
'fr###yfree.net':80
'pu###orty.net':80
'de###all.net':80
'pu###ree.net':80
'be##lxc.com':80
'de###lxc.com':80
'ri###nstorm.net':80
'af###sllc.com':80
'de###ree.net':80
'sh###forty.net':80
'ti###all.net':80
'sh###free.net':80
'fr###yforty.net':80
'al###wall.net':80
'de####erwall.net':80
'al###other.net':80
'de####erother.net':80
'fi###plain.net':80
'qu###plain.net':80
'fi###step.net':80
'qu###step.net':80
'pu###all.net':80
'fr###ywall.net':80
'pu###ther.net':80
'fr###yother.net':80
'al###forty.net':80
'de####erforty.net':80
'al###free.net':80
'de####erfree.net':80

TCP:

HTTP GET requests:

http://bo###lack.net/index.php
http://ga###lack.net/index.php
http://bo###rown.net/index.php
http://ga###rown.net/index.php
http://le###plain.net/index.php
http://fa###lain.net/index.php
http://le###step.net/index.php
http://fa###tep.net/index.php
http://fi###black.net/index.php
http://qu###black.net/index.php
http://fi###grown.net/index.php
http://qu###grown.net/index.php
http://bo###lain.net/index.php
http://ga###lain.net/index.php
http://bo###tep.net/index.php
http://ga###tep.net/index.php
http://le###grown.net/index.php
http://wa###lack.net/index.php
http://st###step.net/index.php
http://wa###rown.net/index.php
http://mo###black.net/index.php
http://we###lain.net/index.php
http://st###grown.net/index.php
http://we###tep.net/index.php
http://st###plain.net/index.php
http://fa###lack.net/index.php
http://mo###step.net/index.php
http://fa###rown.net/index.php
http://le###black.net/index.php
http://wa###lain.net/index.php
http://mo###grown.net/index.php
http://wa###tep.net/index.php
http://mo###plain.net/index.php
http://de###ther.net/index.php
http://sh###wall.net/index.php
http://de###orty.net/index.php
http://sh###other.net/index.php
http://fr###yfree.net/index.php
http://pu###orty.net/index.php
http://de###all.net/index.php
http://pu###ree.net/index.php
http://be##lxc.com/index.php
http://de###lxc.com/index.php
http://ri###nstorm.net/index.php
http://af###sllc.com/index.php
http://de###ree.net/index.php
http://sh###forty.net/index.php
http://ti###all.net/index.php
http://sh###free.net/index.php
http://fr###yforty.net/index.php
http://al###wall.net/index.php
http://de####erwall.net/index.php
http://al###other.net/index.php
http://de####erother.net/index.php
http://fi###plain.net/index.php
http://qu###plain.net/index.php
http://fi###step.net/index.php
http://qu###step.net/index.php
http://pu###all.net/index.php
http://fr###ywall.net/index.php
http://pu###ther.net/index.php
http://fr###yother.net/index.php
http://al###forty.net/index.php
http://de####erforty.net/index.php
http://al###free.net/index.php
http://de####erfree.net/index.php

UDP:

DNS ASK ga###lack.net
DNS ASK le###step.net
DNS ASK ga###rown.net
DNS ASK bo###lack.net
DNS ASK fa###lain.net
DNS ASK le###grown.net
DNS ASK fa###tep.net
DNS ASK le###plain.net
DNS ASK bo###rown.net
DNS ASK fi###black.net
DNS ASK qu###black.net
DNS ASK fi###grown.net
DNS ASK qu###grown.net
DNS ASK bo###lain.net
DNS ASK ga###lain.net
DNS ASK bo###tep.net
DNS ASK ga###tep.net
DNS ASK st###step.net
DNS ASK we###tep.net
DNS ASK mo###black.net
DNS ASK wa###lack.net
DNS ASK st###grown.net
DNS ASK we###rown.net
DNS ASK st###plain.net
DNS ASK we###lain.net
DNS ASK wa###rown.net
DNS ASK fa###lack.net
DNS ASK mo###step.net
DNS ASK fa###rown.net
DNS ASK le###black.net
DNS ASK wa###lain.net
DNS ASK mo###grown.net
DNS ASK wa###tep.net
DNS ASK mo###plain.net
DNS ASK de###ther.net
DNS ASK sh###wall.net
DNS ASK de###orty.net
DNS ASK sh###other.net
DNS ASK fr###yfree.net
DNS ASK pu###orty.net
DNS ASK de###all.net
DNS ASK pu###ree.net
DNS ASK be##lxc.com
DNS ASK de###lxc.com
DNS ASK ri###nstorm.net
DNS ASK af###sllc.com
DNS ASK de###ree.net
DNS ASK sh###forty.net
DNS ASK ti###all.net
DNS ASK sh###free.net
DNS ASK fr###yforty.net
DNS ASK al###wall.net
DNS ASK de####erwall.net
DNS ASK al###other.net
DNS ASK de####erother.net
DNS ASK fi###plain.net
DNS ASK qu###plain.net
DNS ASK fi###step.net
DNS ASK qu###step.net
DNS ASK pu###all.net
DNS ASK fr###ywall.net
DNS ASK pu###ther.net
DNS ASK fr###yother.net
DNS ASK al###forty.net
DNS ASK de####erforty.net
DNS ASK al###free.net
DNS ASK de####erfree.net
'23#.#55.255.250':1900

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