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Trojan.DownLoader8.45440
Added to the Dr.Web virus database:
2013-04-19
Virus description added:
2013-04-28
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'b1sjpey22rxkfn95k2brseb1x3iwseo5pq' = '<SYSTEM32>\qcvnlirs.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'b1sjpey22rxkfn95k2brseb1x3iwseo5pq' = '<SYSTEM32>\qcvnlirs.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'b1sjpey22rxkfn95k2brseb1x3iwseo5pq' = '<SYSTEM32>\qcvnlirs.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\winlogon.exe' = '<SYSTEM32>\winlogon.exe:*:enabled:@shell32.dll,-1'
Creates and executes the following:
'<SYSTEM32>\qcvnlirs.exe'
'<Current directory>\Server.exe'
Executes the following:
'<SYSTEM32>\attrib.exe' "<Current directory>\Server.exe" -h -r -s
'<SYSTEM32>\cmd.exe' /c <Current directory>\t7hbjmyx4aa1bw2.bat
'<SYSTEM32>\notepad.exe' <Current directory>\ёЮАМЗГ АЪµї»зіЙ.txt
Injects code into
the following system processes:
Hides the following processes:
<Current directory>\Server.exe
<SYSTEM32>\qcvnlirs.exe
Modifies file system :
Creates the following files:
%TEMP%\Temporary Internet Files\Content.IE5\AR9LQS9Y\asd[1].exe
%TEMP%\History\History.IE5\desktop.ini
%TEMP%\Temporary Internet Files\Content.IE5\234ROBZI\desktop.ini
%PROGRAM_FILES%\Internet Explorer\1.exe
%TEMP%\Temporary Internet Files\Content.IE5\KH0D8RK1\asd[1].exe
<Current directory>\t7hbjmyx4aa1bw2.bat
<SYSTEM32>\qcvnlirs.exe
%TEMP%\Temporary Internet Files\Content.IE5\PC50Q33G\desktop.ini
<Current directory>\ёЮАМЗГ АЪµї»зіЙ.txt
<Current directory>\Server.exe
%TEMP%\nse2.tmp\System.dll
%TEMP%\Temporary Internet Files\Content.IE5\KH0D8RK1\desktop.ini
%TEMP%\Temporary Internet Files\Content.IE5\AR9LQS9Y\desktop.ini
%TEMP%\Temporary Internet Files\Content.IE5\desktop.ini
Sets the 'hidden' attribute to the following files:
%TEMP%\Temporary Internet Files\Content.IE5\234ROBZI\desktop.ini
%TEMP%\Temporary Internet Files\Content.IE5\PC50Q33G\desktop.ini
%TEMP%\History\History.IE5\desktop.ini
<SYSTEM32>\qcvnlirs.exe
%PROGRAM_FILES%\Internet Explorer\1.exe
<Current directory>\ёЮАМЗГ АЪµї»зіЙ.txt
<Current directory>\Server.exe
%TEMP%\Temporary Internet Files\Content.IE5\desktop.ini
%TEMP%\Temporary Internet Files\Content.IE5\KH0D8RK1\desktop.ini
%TEMP%\Temporary Internet Files\Content.IE5\AR9LQS9Y\desktop.ini
Deletes the following files:
%TEMP%\Temporary Internet Files\Content.IE5\AR9LQS9Y\asd[1].exe
<Current directory>\Server.exe
%TEMP%\~DF4816.tmp
%TEMP%\nse2.tmp\System.dll
%TEMP%\~DF2A8B.tmp
Network activity:
Connects to:
'ow##ry.com':443
'cx##od.com':443
'yf##hu.com':443
'my##mi.com':443
'yp##au.com':443
'ur##ao.com':443
'mw##ra.com':443
'uf##uk.com':443
'localhost':1041
'pd###.egloos.com':80
'il#.#renz.pl':80
'bl##.naver.com':80
'oe##le.com':443
'an#.#renz.pl':80
'localhost':1044
'14.##.24.111':4852
TCP:
HTTP GET requests:
bl##.naver.com/PostView.nhn?bl####################################
pd###.egloos.com/pds/201301/31/40/asd.exe
bl##.naver.com/PostView.nhn?bl################################################################################################################################################################################################
UDP:
DNS ASK mw##ra.com
DNS ASK cx##od.com
DNS ASK ow##ry.com
DNS ASK ur##ao.com
DNS ASK yp##au.com
DNS ASK uf##uk.com
DNS ASK my##mi.com
DNS ASK pd###.egloos.com
DNS ASK bl##.naver.com
DNS ASK il#.#renz.pl
DNS ASK yf##hu.com
DNS ASK an#.#renz.pl
DNS ASK oe##le.com
Miscellaneous:
Searches for the following windows:
ClassName: '' WindowName: '?? ? ?? ?? ??'
ClassName: '' WindowName: '?????'
ClassName: '' WindowName: '??? ?? - ??'
ClassName: '' WindowName: 'qcvnlirs.exe ??'
ClassName: '' WindowName: 'qcvnlirs.exe ?? ??'
ClassName: '' WindowName: '???? ?? ?? ??'
ClassName: '' WindowName: '??? ??'
ClassName: 'MS_WebcheckMonitor' WindowName: ''
ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' WindowName: '??? ?? ??? ??'
ClassName: '' WindowName: '??? ?? ??? ?? ???'
ClassName: 'Indicator' WindowName: ''
Curing recommendations
Windows
macOS
Linux
Android
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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