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Need help with unpacking UPX file

Discussion in 'REQ > Others' started by htcprophet, Aug 6, 2017.

  1. ht

    htcprophet Registered User Reverser

    Aug 26, 2009
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    Is there anyone to have experience with unpacking Linux files?
    I have a file packed with UPX, When I want to unpack it , It shows me an error

    'upx: lshttpd: Exception: compressed data violation'

    Can anyone help me with this?
  2. Co

    Cordelia Registered User

    Aug 4, 2017
    Likes Received:

    You could try unpacking with a different version of UPX. Possibly an older version.

    Otherwise, is there any reason that someone might have deliberately tampered with the file?
  3. WhiteWolf

    WhiteWolf is a Verified Warez PosterWhiteWolf Moderator Staff Member Moderator

    Mar 6, 2017
    Likes Received:
    If im not wrong UPX is a windows extension packer possible that it doesnt work on your linux machine.
    sollution : unpack on windows machine then transfer through samba or other way to your linux os :)
    Hope this helps...
    htcprophet likes this.
  4. Skydevil

    Skydevil is a Trusted Warez PosterSkydevil Administrator Staff Member Administrator V.I.P DEV Guild

    Oct 4, 2008
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    Just take a look at the side of upx...

    The source codes are available. Sadly I don't have any compiler and debugger for Linux and could help at this point. Also a quick look at the source code with the unix parts doesn't show anything interesting. Maybe the file is packed with a modified upx packer.

    Maybe any older upx version could unpack the linux file.

    An interesting information is this...
    What means it's possible to unpack the Linux executable on a Windows platform, where know debugger should be available.

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