Trojan.DownLoader8.31807

Technical Information

To ensure autorun and distribution:

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\SVKP] 'Start' = '00000002'

Malicious functions:

Executes the following:

<SYSTEM32>\dumprep.exe 3096 -dm 7 7 %TEMP%\WER230e.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 3096 -dm 7 7 %TEMP%\WER230e.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3148 -dm 7 7 %TEMP%\WER5405.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 3148 -dm 7 7 %TEMP%\WER5405.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2968 -dm 7 7 %TEMP%\WERe953.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2968 -dm 7 7 %TEMP%\WERe953.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3032 -dm 7 7 %TEMP%\WER01d2.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 3032 -dm 7 7 %TEMP%\WER01d2.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3192 -dm 7 7 %TEMP%\WER73f0.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3352 -dm 7 7 %TEMP%\WER0e65.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3300 -dm 7 7 %TEMP%\WERdc41.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 3404 -dm 7 7 %TEMP%\WER1179.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3352 -dm 7 7 %TEMP%\WER0e65.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 3248 -dm 7 7 %TEMP%\WERa1a0.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3192 -dm 7 7 %TEMP%\WER73f0.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 3300 -dm 7 7 %TEMP%\WERdc41.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 3248 -dm 7 7 %TEMP%\WERa1a0.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2924 -dm 7 7 %TEMP%\WERcb11.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2604 -dm 7 7 %TEMP%\WERc4b0.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2604 -dm 7 7 %TEMP%\WERc4b0.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2656 -dm 7 7 %TEMP%\WERfd01.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2656 -dm 7 7 %TEMP%\WERfd01.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2552 -dm 7 7 %TEMP%\WERa3c3.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\calc.exe
<SYSTEM32>\rundll32.exe <SYSTEM32>\sysdm.cpl,NoExecuteProcessException <SYSTEM32>\calc.exe
<SYSTEM32>\dumprep.exe 2552 -dm 7 7 %TEMP%\WERa3c3.dir00\calc.exe.hdmp 16325836412027100
<SYSTEM32>\dumprep.exe 2708 -dm 7 7 %TEMP%\WER157c.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2868 -dm 7 7 %TEMP%\WER9d75.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2808 -dm 7 7 %TEMP%\WER61a1.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2924 -dm 7 7 %TEMP%\WERcb11.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2868 -dm 7 7 %TEMP%\WER9d75.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2748 -dm 7 7 %TEMP%\WER580c.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2708 -dm 7 7 %TEMP%\WER157c.dir00\calc.exe.hdmp 16325836412027092
<SYSTEM32>\dumprep.exe 2808 -dm 7 7 %TEMP%\WER61a1.dir00\calc.exe.mdmp 16325836412027080
<SYSTEM32>\dumprep.exe 2748 -dm 7 7 %TEMP%\WER580c.dir00\calc.exe.hdmp 16325836412027092

Injects code into

the following system processes:

<SYSTEM32>\calc.exe

Modifies file system :

Creates the following files:

%TEMP%\WER01d2.dir00\appcompat.txt
%TEMP%\WER01d2.dir00\calc.exe.hdmp
%TEMP%\WER01d2.dir00\calc.exe.mdmp
%TEMP%\WER01d2.dir00\manifest.txt
%TEMP%\WER230e.dir00\appcompat.txt
%TEMP%\WER230e.dir00\calc.exe.hdmp
%TEMP%\WER230e.dir00\calc.exe.mdmp
%TEMP%\WERe953.dir00\manifest.txt
%TEMP%\WERcb11.dir00\appcompat.txt
%TEMP%\WERcb11.dir00\calc.exe.hdmp
%TEMP%\WERcb11.dir00\calc.exe.mdmp
%TEMP%\WERcb11.dir00\manifest.txt
%TEMP%\WERe953.dir00\appcompat.txt
%TEMP%\WERe953.dir00\calc.exe.hdmp
%TEMP%\WERe953.dir00\calc.exe.mdmp
%TEMP%\WER230e.dir00\manifest.txt
%TEMP%\WERdc41.dir00\calc.exe.mdmp
%TEMP%\WERa1a0.dir00\calc.exe.hdmp
%TEMP%\WER73f0.dir00\manifest.txt
%TEMP%\WERa1a0.dir00\appcompat.txt
%TEMP%\WER0e65.dir00\calc.exe.mdmp
%TEMP%\WERdc41.dir00\calc.exe.hdmp
%TEMP%\WERa1a0.dir00\manifest.txt
%TEMP%\WER73f0.dir00\appcompat.txt
%TEMP%\WER5405.dir00\appcompat.txt
%TEMP%\WER5405.dir00\calc.exe.hdmp
%TEMP%\WER5405.dir00\calc.exe.mdmp
%TEMP%\WER5405.dir00\manifest.txt
%TEMP%\WERa1a0.dir00\calc.exe.mdmp
%TEMP%\WER73f0.dir00\calc.exe.hdmp
%TEMP%\WER73f0.dir00\calc.exe.mdmp
%TEMP%\WER9d75.dir00\manifest.txt
%TEMP%\WERc4b0.dir00\appcompat.txt
%TEMP%\WERc4b0.dir00\calc.exe.hdmp
%TEMP%\WERc4b0.dir00\calc.exe.mdmp
%TEMP%\WERc4b0.dir00\manifest.txt
%TEMP%\WERfd01.dir00\appcompat.txt
%TEMP%\WERfd01.dir00\calc.exe.hdmp
%TEMP%\WERfd01.dir00\calc.exe.mdmp
%TEMP%\WERa3c3.dir00\manifest.txt
%CommonProgramFiles%\Microsoft Shared\MSInfo\re2009.exe
%CommonProgramFiles%\Microsoft Shared\MSInfo\SetupWay.txt
<SYSTEM32>\SVKP.sys
%PROGRAM_FILES%\_re2009.exe
%TEMP%\WERa3c3.dir00\appcompat.txt
%TEMP%\WERa3c3.dir00\calc.exe.hdmp
%TEMP%\WERa3c3.dir00\calc.exe.mdmp
%TEMP%\WERfd01.dir00\manifest.txt
%TEMP%\WER61a1.dir00\appcompat.txt
%TEMP%\WER61a1.dir00\calc.exe.hdmp
%TEMP%\WER580c.dir00\manifest.txt
%TEMP%\WER61a1.dir00\manifest.txt
%TEMP%\WER9d75.dir00\appcompat.txt
%TEMP%\WER9d75.dir00\calc.exe.hdmp
%TEMP%\WER9d75.dir00\calc.exe.mdmp
%TEMP%\WER61a1.dir00\calc.exe.mdmp
%TEMP%\WER157c.dir00\appcompat.txt
%TEMP%\WER157c.dir00\calc.exe.hdmp
%TEMP%\WER157c.dir00\calc.exe.mdmp
%TEMP%\WER157c.dir00\manifest.txt
%TEMP%\WER580c.dir00\appcompat.txt
%TEMP%\WER580c.dir00\calc.exe.hdmp
%TEMP%\WER580c.dir00\calc.exe.mdmp

Sets the 'hidden' attribute to the following files:

%PROGRAM_FILES%\_re2009.exe
%CommonProgramFiles%\Microsoft Shared\MSInfo\re2009.exe

Deletes the following files:

%CommonProgramFiles%\Microsoft Shared\MSInfo\SetupWay.txt

Deletes itself.

Network activity:

Connects to:

'nk####or.3322.org':8181

UDP:

DNS ASK nk####or.3322.org

Miscellaneous:

Searches for the following windows:

ClassName: 'TSaxiChristmas' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: 'TAppBuilder' WindowName: ''
ClassName: 'MS_WINHELP' WindowName: ''

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