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Thread: Malicious ".jar" file? [Help me]

  1. #1
    Junior Member
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    Jul 2021
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    Default Malicious ".jar" file? [Help me]

    Good evening friends from the Java community.
    I recently switched my operating system to MX Linux and started installing some programs and applications that I use.

    Recently I downloaded a file (.jar) to check its function, noticed the operation of the application and then removed it from the machine.
    However, is it possible to verify that the particular file (.jar) has downloaded or installed any other file or library, as well as whether it has modified or deleted any existing files on the machine?

    It is a btc private key generator and I have the site from where I downloaded the file.
    I would just like to know if he created any residue or altered any files from the machine, or if it is just the executable (.jar) and nothing more than that.

    I wanted to check (if possible) if it installed, altered or left any residue.

    The file in question is:

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
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    Default Re: Malicious ".jar" file? [Help me]

    Not sure how java programming can be used to check the contents of your PC. Surely the OS has some tools for checking security.

    Normally if I were to run an unknown jar file, I would use a permissions file:
    A windows batch file
    @Rem Test a jar file
    java -Djava.security.manager -Djava.security.policy=mypolicy4RC.policy -jar RouteConverterCmdLine.jar
    The mypolicy4RC.policy file:

    grant {
    permission java.util.logging.LoggingPermission "control";
    permission java.lang.RuntimePermission "preferences";
    These files are several years old and I don't remember what they are used for.
    If you don't understand my answer, don't ignore it, ask a question.

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