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Win32.Trojan.Chistudi.Llra also known as Unwanted-Program ( 004c5cea1 ), Adware.Generic.DF39AD, Adware.Generic.997805.

Malware Analysis of Win32.Trojan.Chistudi.Llra – MCOS.EXE

Created files:

%WINDIR%\VBADDIN.BAT
%WINDIR%\WNTLDR.EXE
%WINDIR%\INSTALLER\MCOS.EXE
%WINDIR%\INSTALLER\WVCE.EXE
%WINDIR%\SECURITY.EXE

Autostart registry keys:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\wvzader: “%WinDir%\Installer\mcos.exe”
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\gwqver: “%WinDir%\Installer\wvce.exe”
HKLM\System\CurrentControlSet\services\str Pqqwormance Adauuis\ImagePath: “%WinDir%\srchasst.exe”
HKLM\System\CurrentControlSet\services\str Pqqwormance Adauuis\DisplayName: “str Pqqwormance Adauuis”
HKLM\System\CurrentControlSet\services\str Pqrformance Adauuis\ImagePath: “%WinDir%\security.exe”
HKLM\System\CurrentControlSet\services\str Pqrformance Adauuis\DisplayName: “str Pqrformance Adauuis”

Detected by UnHackMe:

MCOS.EXE
Default location: %WinDir%\INSTALLER\MCOS.EXE

Dropper hash(md5): 686fd8c5e5eb9970ef718f15e945e9fd

Written by NightWatcher

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