Linux LOLBins Applications Available in Windows

    Published: 2022-12-03
    Last Updated: 2022-12-03 20:09:25 UTC
    by Guy Bruneau (Version: 1)
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    Some useful Linux applications that are now part of default installation in Windows 10, Windows Server 2019/2022 (LOLBins - Living Off the Land Binaries). 

     

    cURL

     

    The first one is curl which can be very useful for scripting to download or upload files and/or use with a username/password (curl --help) and save the output either to a new filename or the same:

     

    C:\Users\guy\Downloads>curl https://handlers.sans.edu/gbruneau/scripts/Example.csv -o Example.csv
      % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                     Dload  Upload   Total   Spent    Left  Speed
    100  230k  100  230k    0     0  1443k      0 --:--:-- --:--:-- --:--:-- 1461k

     

    tar

     

    The next application is tar (tar --help) is used to store, extract and manipulate archive files. Let’s take the previous file Example.csv, archive and compress it and then review the result. Using the same options as Linux will use gzip compression and create the file Example.tgz:

     

    -c Create  -r Add/Replace  -t List  -u Update  -x Extract
    -f <filename>  Location of archive
    -v Verbose
    -z, -j, -J, --lzma  Compress archive with gzip/bzip2/xz/lzma

    C:\Users\guy\Downloads>tar zcvf example.tgz Example.csv
    C:\Users\guy\Downloads>dir Example.*
     Volume in drive C is Starbase
     Volume Serial Number is EEB2-C010

     Directory of C:\Users\guy\Downloads

    12/03/2022  01:39 PM           236,526 Example.csv
    12/03/2022  01:46 PM            38,247 example.tgz
     

    To extract the file(s), using the following command:

    C:\Users\guy\Downloads>tar xvf example.tgz
    x Example.csv

     

    To view the content of the archive:

     

    c:\Users\guy\Downloads>tar ztvf Example.tgz
    -rw-rw-rw-  0 0      0      236526 Dec 03 13:39 Example.csv

     

    PktMON

     

    This tool is a Windows original which I think is worth mentionning again. I wrote a diary in May 2020 [1] on how to use PktMON to capture packets using this tool in Windows 10. The resulting packet capture can be converted into a pcapng format to be read later with Wireshark.

     

    OpenSSH

     

    The last one that is always useful is ssh/scp/sftp which is using the OpenSSH. The location of the OpenSSH binaries is: C:\Windows\System32\OpenSSH

     

    ssh
    scp
    sftp
    ssh-add.exe
    ssh-agent.exe
    ssh-keygen.exe
    ssh-keyscan.exe

     

    First lest create some public/private keys using the default user home directory:

     

    C:\Users\guy>ssh-keygen
    Generating public/private rsa key pair.
    Enter file in which to save the key (C:\Users\guy/.ssh/id_rsa):
    Enter passphrase (empty for no passphrase):
    Enter same passphrase again:
    Your identification has been saved in C:\Users\guy/.ssh/id_rsa.
    Your public key has been saved in C:\Users\guy/.ssh/id_rsa.pub.
    [...]
    C:\Users\guy>cd .ssh

    C:\Users\guy\.ssh>dir
     Volume in drive C is Starbase
     Volume Serial Number is EEB2-C010

     Directory of C:\Users\guy\.ssh

    12/03/2022  02:10 PM    <DIR>          .
    12/03/2022  02:10 PM    <DIR>          ..
    12/03/2022  02:10 PM             2,655 id_rsa
    12/03/2022  02:10 PM               567 id_rsa.pub
    11/10/2022  01:49 PM               545 known_hosts

     

    Now ssh/scp/sftp is ready to use with a public key to a remote server. By default OpenSSH doesn't run the SSH listener service but it can be configured using the information posted here in a Microsoft article.

     

    [1] https://isc.sans.edu/diary/Windows+10+Builtin+Packet+Sniffer+PktMon/26186
    [2] https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_overview
    [3] https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_server_configuration
    -----------
    Guy Bruneau IPSS Inc.
    My Handler Page
    Twitter: GuyBruneau
    gbruneau at isc dot sans dot edu

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