a variant of Win32/Tencent.E potentially unwanted

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Malware Analysis of a variant of Win32/Tencent.E potentially unwanted – QBDOWNLOAD.EXE

Created files:

%Temp%\nsm7.tmp\System.dll
%Temp%\nsr6.tmp
%Temp%\QBDownload.exe
%Temp%\qbdrf\dr.dll
%Temp%\QQPCDownload8889533.exe

Autostart registry keys:

HKLM\Software\Classes\CLSID\{D1871D0A-4929-4A3C-AAE5-684235E62244}\InprocServer32\: “%Program Files%\SogouSoftware\3.1.13.62\npdownload.dll”
HKLM\Software\Classes\CLSID\{D4D786E8-0535-41DB-91F8-B18ABBCCDE6C}\LocalServer32\: “%Program Files%\SogouSoftware\SogouSoftware.exe”
HKLM\Software\Microsoft\Windows\CurrentVersion\Group Policy\History\{35378EAC-683F-11D2-A89A-00C04FBBCFA2}\0\DisplayName: “Local Group Policy”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\SogouSoftware\DisplayName: “Ei??OuEO”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\SogouSoftware\UninstallString: “%Program Files%\SogouSoftware\uninst.exe”
HKLM\System\CurrentControlSet\Services\SogouSoftwareUpdate\ImagePath: “”%Program Files%\SogouSoftware\update\UpdateService.exe” /Service”
HKLM\System\CurrentControlSet\Services\SogouSoftwareUpdate\DisplayName: “SogouSoftware Update Service”
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\SogouSoftware: “%Program Files%\SogouSoftware\SogouSoftware.exe /AutoRun”

Detected by UnHackMe:

QBDOWNLOAD.EXE
Default location: %TEMP%\QBDOWNLOAD.EXE

Dropper hash(md5): e4c4a6d96a7faca55732e76eea18cec1

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