decrypt dahua DH-XVR1A08 configFileExport.backup failed

[beruhan]

I have a dahua DH-XVR1A08 configFileExport.backup file,but decrypt failed,the onfigFileExport.backup asfollows
configFileExport.zip

[iTuneDVR]

I have a dahua DH-XVR1A08 configFileExport.backup file,but decrypt failed,the onfigFileExport.backup asfollows configFileExport.zip

It's some unusual data inside ;)
More details about device.
Firmware version (screenshot from web wersion of firmware or photo from monitor from firmware version vindow, photo from label under device case)

Upd.