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 Forums >>  Debuggers  >>  .udd files

Topic created on: July 3, 2012 03:50 CDT by blowcheck .

Hi all,
I use immunity debugger, sometime comments doesnt' get saved on the .exe during analysis.
I know that .udd files are those used by saving process, i googled but i didn't find a straighforward solution.
It happen not on every executables, usually i'm able to save comments but i noticed it during my last 2 different executable analysis.
Could you give me some advices?
regards

  waleedassar     July 3, 2012 15:27.55 CDT
This may be due to a change in the file size since the last session. You can see this if you press ALT+L.

"Size changed, discarding .udd data".

Also if session date e.g. comments are placed in .DLLs loaded by the process, then nothing will be saved for them. To overcome this problem, i just separately open the DLL in OllyDbg and then terminate OllyDbg. This way if the DLL is xxx.dll, then xxx.udd is created and can be used by any process loading xxx.dll.

  waleedassar     July 3, 2012 17:29.52 CDT
Other reasons for OllyDbg v1.10 to discard .UDD data are:

1) A change in the file pathname e.g. xxx.exe moved from "c:\xxx.exe" to "c:\new\xxx.exe".

You can set the "Ignore path and extension" option to bypass this check.

2) A change in the LastWrite time of file.

You can set the "Ignore timestamp" option to bypass this check.

3) A change in the CRC of the code section since last session.

You can set the "Ignore CRC of code section" option to bypass this check.

  blowcheck     July 4, 2012 03:59.49 CDT
THANKS A LOT, i was becoming crazy.. it works like a charm.
I opened the dll used by the executable with immunity , file .udd was created, then i opened the executable making comments (in fact comments were written in the .dll, then to be sure i flagged ignore timestamp and ignore crc)
Proabaly is enough to create the dll udd file as suggested by you.
thanks a lot waleedassar!!

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