Backdoor Bifrose – kernel31.dll – 7bbac3ba27abf9b07717e520c437ce73

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Backdoor Bifrose
Also known as: Trojan Graftor, Backdoor PcClien
SHA256: 30dbbd612ba6db2827a2d94875b196adb3140bc902946ea2a58fc11bd8d35a94
SHA1: ad2a8978141048d4ec0f23338f6fafcffd770899
MD5: 7bbac3ba27abf9b07717e520c437ce73
File size: 904192 bytes

Created files:

C:\windows\system32\kernel31.dll – Backdoor Bifrose
C:\windows\system32\mubdzs.dll – Backdoor Bifrose
%Temp%\IXP000.TMP\mspaint.exe – Backdoor Bifrose
%Temp%\IXP000.TMP\mstsc.exe – Backdoor Bifrose
%Temp%\IXP000.TMP\netsetup.exe – Backdoor Bifrose
%Temp%\IXP000.TMP\sndrec32.exe – Backdoor Bifrose
%Temp%\IXP000.TMP\sndvol32.exe – Backdoor Bifrose
%Temp%\IXP000.TMP\zhong.exe – Backdoor Bifrose
%Temp%\IXP000.TMP\zhonghua.exe – Backdoor Bifrose

Backdoor Bifrose created autostart registry keys:

HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0: rundll32.exe %WinDir%\System32\advpack.dll,DelNodeRunDLL32 “%Temp%\IXP000.TMP\”
HKLM\System\CurrentControlSet\Services\mubdzs\Type: 10010000
HKLM\System\CurrentControlSet\Services\mubdzs\Start: 02000000
HKLM\System\CurrentControlSet\Services\mubdzs\ErrorControl: 01000000
HKLM\System\CurrentControlSet\Services\mubdzs\DisplayName: mubdzs
HKLM\System\CurrentControlSet\Services\mubdzs\ImagePath: %WinDir%\System32\svchost.exe -k mubdzs
HKLM\System\CurrentControlSet\Services\mubdzs\Parameters\ServiceDll: 2500530079007300740065006D0052006F006F00740025005C00530079007300740065006D00330032005C006D007500620064007A0073002E0064006C006C000000

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