Win.Worm.Chir-2302

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Malware Analysis of Win.Worm.Chir-2302 – NYYODU.EXE

Created files:

%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\MICROSOFT.VC80.CRT\MSVCR80.DLL
%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\MINDOWNLOAD.ICO
%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\NYYODU.EXE
%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\PROTOCOLDLL.DLL
%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\REPORTDLL.DLL

Autostart registry keys:

HKLM\SOFTWARE\CLASSES\CLSID\{D3C9CF85-72D2-4D22-B16A-0B682403AB84}\INPROCSERVER32\: “%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\IEBDSOFTHELPERPLUG.DLL”
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\BaiduRJDownloader\DisplayName: “?????? 1.6.0.77”
HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\BAIDURJDOWNLOADER\UNINSTALLSTRING: “%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\UNINSTALLER.EXE”
HKLM\System\CurrentControlSet\services\bd0001\ImagePath: “system32\DRIVERS\bd0001.sys”
HKLM\System\CurrentControlSet\services\bd0001\DisplayName: “bd0001”
HKLM\System\CurrentControlSet\services\bd0004\ImagePath: “system32\DRIVERS\bd0004.sys”
HKLM\System\CurrentControlSet\services\bd0004\DisplayName: “bd0004”
HKLM\System\CurrentControlSet\services\BDArKit\ImagePath: “system32\DRIVERS\BDArKit.sys”
HKLM\System\CurrentControlSet\services\BDArKit\DisplayName: “BDArKit”
HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\BDDLSVC\IMAGEPATH: “”%APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\BDDLSVC.EXE” -R”
HKLM\System\CurrentControlSet\services\bddlsvc\DisplayName: “BDHY Service”
HKLM\System\CurrentControlSet\services\BDMWrench\ImagePath: “system32\DRIVERS\BDMWrench.sys”
HKLM\System\CurrentControlSet\services\BDMWrench\DisplayName: “BDMWrench”

Detected by UnHackMe:

NYYODU.EXE
DEFAULT LOCATION: %APPDATA%\BAIDU\BAIDURJDOWNLOADER\1.6.0.77\NYYODU.EXE

Dropper hash(md5): 434585db9697c67eff8e63f4f068075c

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