BMP File Creation Being Blocked

Hi,

While working on some C++ code of my own (using Visual Studio on Windows 10) I discovered that existing code for creating BMP files was now failing. In the end this was tracked down to the initial file creation with any filename with a *.bmp extension failing - same call with another file extension (for example *.bm2) working fine. After a lot of debugging I tired disabling the Avast shields and the old code again works fine.

To follow up on this,

  • How can I get BMP creation working with the Avast shields active (whitelisting the applications in question?)
  • I want to eventually share the applications with other users - is there any way I can do this without having to share “how to get this working with Avast” instructions?
    [li]Is this a temporary problem - I imagine that *.bmp files may be considered a threat (there was one comment on the avast forum to this effect) but is the only solution to block all bmp file creation actions?

Thanks

software developers

Support: Avast file whitelisting
https://www.avast.com/faq.php?article=AVKB229#artTitle

Support: Avast Clean Guidelines
https://www.avast.com/faq.php?article=AVKB228#artTitle

https://forum.avast.com/index.php?topic=14433.msg1289438#msg1289438

Hi lost.realms,
I would like to ask you to create a promon log to capture file creation , nt status and stack.

  1. Download procmon from: https://docs.microsoft.com/en-us/sysinternals/downloads/procmon
  2. Start procmon as admin
  3. Induce the issue - try to create bmp file
  4. Save procmon log. Menu → File → Save … → All events checkbox , Native process monitor Format.
  5. Zip procmon log as lost_realms_bmp_log.zip and upload it to ftp://ftp.avast.com/incoming

Thank you for interesting report !

Hi Kwiq,

File uploaded as requested (sorry for the delay).

Hi lost.realms,
Do you have avast Ransomware Shield installed and active ? If yes try to turn off for a while and test your application.
Thank you for procmon log.