Checksum error at rBot.ncb file

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#105 opened on Mar 21, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 1/5
Estimated time: Under an hour
Newbie friendliness: 45/100

Issue type: Bug
Clarity: Clearly specified
Activity status: Stale
Domain: content

Research direction

Inspect MalwareSourceCode/Win32/Malware Families/Win32.RBot/Win32.RBot.a.g.h.rar and reproduce the failure with the unrar extraction command shown in the issue. Replace or repair the affected archive so rBot.ncb extracts without a checksum error or unexpected end-of-archive message.

Written by the indexing model from the issue text.

Description

Hello,

I found that the file rBot.ncb located in MalwareSourceCode/Win32/Malware Families/Win32.RBot/Win32.RBot.a.g.h.rar has a checksum error when I try to extract it with unrar.

The command that I use to extract the files is:

unrar e -p Win32.RBot.a.g.h.rar

And the error that I get is the following:

Enter password (will not be echoed): 

Reenter password: 


UNRAR 7.00 freeware      Copyright (c) 1993-2024 Alexander Roshal


Extracting from Win32.RBot.a.g.h.rar

Extracting  webdav.cpp                                                OK 
Extracting  webdav.h                                                  OK 
...
Extracting  rBot.h                                                    OK 
Extracting  rBot.ncb                                                 100%
rBot.ncb             - checksum error
Unexpected end of archive
Total errors: 2

Please, could you reupload the file?

Regards,
DonCaralludo

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