This commit includes a new module that allows for payloads to be
uploaded and executed from disk while bypassing AppLocker in the
process. This module is useful for when you're attempting to generate
new shells on the target once you've already got a session. It is also
a handy way of switching between 32 and 64 bit sessions (in the case of
the InstallUtil technique).
The code is taken from Casey Smith's AppLocker bypass research (added in
the references), and includes just one technique at this point. This
technique uses the InstallUtil feature that comes with .NET. Other
techiques can be added at any time.
The code creates a C# file and uploads it to the target. The csc.exe
compiler is used to create a .NET assembly that contains an uninstaller
that gets invoked by InstallUtil behind the scenes. This function is
what contains the payload.
This was tested on Windows 7 x64. It supports running of both 32 and 64
bit payloads out of the box, and checks to make sure that .NET is
installed on the target as well as having a payload that is valid for
the machine (ie. don't run x64 on x86 OSes).
This appears to work fine with both staged and stageless payloads.
In #6283, we discovered that ms08_067 was busted with reverse_tcp. The
solution was to bump the amount of space needed to help with encoding.
However, we flew a little too close to the sun, and introduced a
regression with bind_tcp on Windows XP SP2 EN where the payload stages
but does not run.
This shrinks the payload just enough to make bind_tcp work again, but
reverse_tcp also continues to work as expected.
def peer is a method that gets repeated a lot in modules, so we
should have it in the tcp mixin. This commit also clears a few
modules that use the HttpClient mixin with def peer.
Most exploits don't check nil for generate_payload_exe, they just
assume they will always have a payload. If the method returns nil,
it ends up making debugging more difficult. Instead of checking nil
one by one, we just raise.
Time to say goodbye to:
exploits/windows/browser/adobe_flash_pixel_bender_bof.rb
Please use:
exploit/multi/browser/adobe_flash_pixel_bender_bof
Reason: The replacement supports multiple platforms, so better.
James Lee
Brent Cook
wchen-r7
Pedro Ribeiro
OJ
William Vu
g0tmi1k
Jon Hart
Tod Beardsley
jvazquez-r7
JT