Trojan.Win32.Cridex.b

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Trojan.Win32.Cridex.b also known as a variant of Win32/Virlock.J, Win32.Virlock.Gen.3, HW32.Packed.32E2.

Malware Analysis of Trojan.Win32.Cridex.b – USERTILE15.BMP.EXE

Created files:

%COMMON APPDATA%\MICROSOFT\USER ACCOUNT PICTURES\DEFAULT PICTURES\USERTILE13.BMP.EXE
%COMMON APPDATA%\MICROSOFT\USER ACCOUNT PICTURES\DEFAULT PICTURES\USERTILE14.BMP.EXE
%COMMON APPDATA%\MICROSOFT\USER ACCOUNT PICTURES\DEFAULT PICTURES\USERTILE15.BMP.EXE
%COMMON APPDATA%\MICROSOFT\USER ACCOUNT PICTURES\DEFAULT PICTURES\USERTILE16.BMP.EXE
%COMMON APPDATA%\MICROSOFT\USER ACCOUNT PICTURES\DEFAULT PICTURES\USERTILE17.BMP.EXE

Autostart registry keys:

HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\CSCKCIAT\IMAGEPATH: “%COMMON APPDATA%\OEYYSCSS\VYKKCMUT.EXE”
HKLM\System\CurrentControlSet\services\csckcIAt\DisplayName: “csckcIAt”

Detected by UnHackMe:

USERTILE15.BMP.EXE
DEFAULT LOCATION: %COMMON APPDATA%\MICROSOFT\USER ACCOUNT PICTURES\DEFAULT PICTURES\USERTILE15.BMP.EXE

Dropper hash(md5): d713c98d633886fdca37e1258b991840

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