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Alex NightWatcher: Solved! (5 / 5)

Riskware.Win32.Unwanted.deqwxg also known as a variant of Win32/Speedchecker.A, Program.Unwanted.12.

Malware Analysis of Riskware.Win32.Unwanted.deqwxg – PCSPEEDUP.EXE

Created files:

%Temp%\nsz3.tmp\SecondOffer2\rcpsetup_cndtppi.exe
%Temp%\nsz3.tmp\SecondOffer3\Perion_Vuupc.exe
%Temp%\nsz3.tmp\SecondOffer4\pcspeedup.exe
%Temp%\nsz3.tmp\Success.htm
%Temp%\nsz3.tmp\System.dll

Autostart registry keys:

HKLM\Software\Classes\CLSID\{459DD0F7-0D55-D3DC-67BC-E6BE37E9D762}\InprocServer32\: “%SysDir%\scrobj.dll”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\RegClean Pro_is1\UninstallString: “”%Program Files%\RegClean Pro\unins000.exe” /silent”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\RegClean-Pro_is1\DisplayName: “RegClean-Pro”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\RegClean-Pro_is1\UninstallString: “”%Program Files%\RegClean Pro\unins000.exe””
HKLM\System\CurrentControlSet\Services\PCSUService\ImagePath: “%Program Files%\PC Speed Up\PCSUService.exe”
HKLM\System\CurrentControlSet\Services\PCSUService\DisplayName: “PC Speed Up Service”

Detected by UnHackMe:

PCSPEEDUP.EXE
Default location: %TEMP%\NSZ3.TMP\SECONDOFFER4\PCSPEEDUP.EXE

Dropper hash(md5): 6f959caaaf4321f4ff69ff6ee33c1d0a

Written by NightWatcher

Malware Hunter.
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