module

DNS TXT Record Payload Download and Execution

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Disclosed
N/A
Created
May 30, 2018

Description

Performs a TXT query against a series of DNS record(s) and executes the returned x86 shellcode. The DNSZONE
option is used as the base name to iterate over. The payload will first request the TXT contents of the a
hostname, followed by b, then c, etc. until there are no more records. For each record that is returned, exactly
255 bytes from it are copied into a buffer that is eventually executed. This buffer should be encoded using
x86/alpha_mixed with the BufferRegister option set to EDI.

Author

corelanc0d3r peter.ve@corelan.be

Platform

Windows

Architectures

x86

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':


    msf > use payload/windows/dns_txt_query_exec
    msf payload(dns_txt_query_exec) > show actions
        ...actions...
    msf payload(dns_txt_query_exec) > set ACTION < action-name >
    msf payload(dns_txt_query_exec) > show options
        ...show and set options...
    msf payload(dns_txt_query_exec) > run
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