Sharp-Suite

The king is dead, long live the king. I am starting a new repo with code samples in C#. My heart is still with PowerShell <3, lets face it using in-line C# in PowerShell is a much nicer experience than actually using C#! However, threat emulation has to evolve over time and so does the tooling.

Pwn?

SwampThing

SwampThing lets you to spoof process command line args (x32/64). Essentially you create a process in a suspended state, rewrite the PEB, resume and finally revert the PEB. The end result is that logging infrastructure will record the fake command line args instead of the real ones. Think for example about launching a wmic xsl stylesheet for code execution but faking an innocuous wmic command.

C:\>SwampThing.exe -l C:\Windows\System32\notepad.exe -f C:\aaa.txt -r C:\bbb.txt
      /
     :;                \
     |l      _____     |;
     `8o __-~     ~\   d|     Swamp
      "88p;.  -._\_;.oP         Thing
       `>,% (\  (\./)8"
      ,;%%%:  ./V^^^V'
;;;,-::::::'_::\   ||\
8888oooooo.  :\`^^^/,,~--._
 oo.8888888888:`((( o.ooo888
   `o`88888888b` )) 888b8888
     b`888888888;(.,"888b888\
....  b`8888888:::::.`8888.
 `:::. `:::OOO:::::::.`OO' ;
   `.      "``::::::''.'        ~ b33f ~

[>] CreateProcess -> Suspended
[+] PE Arch                       : 64-bit
[+] Process Id                    : 10568
[+] PEB Base                      : 0xA3C2431000
[+] RTL_USER_PROCESS_PARAMETERS   : 0x20DA9760000
[+] CommandLine                   : 0x20DA9760070
[+] UNICODE_STRING |-> Len        : 66
                   |-> MaxLen     : 68
                   |-> pBuff      : 0x20DA9760658

[>] Rewrite -> RTL_USER_PROCESS_PARAMETERS
[+] RtlCreateProcessParametersEx  : 0xEAADF0
[+] RemoteAlloc                   : 0xEA0000
[+] Size                          : 1776
[?] Success, sleeping 500ms..

[>] Reverting RTL_USER_PROCESS_PARAMETERS
[+] Local UNICODE_STRING          : 0xEBC4D0
[+] Remote UNICODE_STRING.Buffer  : 0x20DA9B10000
[+] pRTL_USER_PROCESS_PARAMETERS  : 0x20DA9870FE0
[?] Success rewrote Len, MaxLen, Buffer..

Windows API

SystemProcessAndThreadsInformation

While working on a side project I had to access out-of-process thread information, to do this I used NtQuerySystemInformation -> SystemProcessAndThreadInformation. As it may be helpful for reference I wrote a small wrapper round this function to list process and thread information for a specific PID. Note that I am not extracting all available information from SYSTEM_PROCESSES and SYSTEM_THREAD_INFORMATION, feel free to extend the output with a pull request.

C:\> SystemProcessAndThreadsInformation.exe -p 4508

[+] Process Details
    ImageName           : powershell.exe
    ProcessId           : 4508
    ParentPid           : 8256
    HandleCount         : 701
    ThreadCount         : 25
    SessionId           : 1
    Priority            : 8
    CreateTime          : 0d:22h:0m:31s:876ms
    UserTime            : 0d:0h:0m:0s:328ms
    KernelTime          : 0d:0h:0m:0s:281ms
    WorkingSetSize      : 73.52734375 MB
    PeakWorkingSetSize  : 73.5859375 MB
    PageFaultCount      : 26896

[+] Thread Details
[>] TID: 9832, Priority: 9
    |-> StartAddress: 0x7FFB84833670
    |-> Created: 0d:22h:0m:31s:876ms, uTime: 0d:0h:0m:0s:46ms, kTime: 0d:0h:0m:0s:93ms
    |-> WaitTime: 5843708, WaitReason: UserRequest
    |-> State: Wait, ContextSwitches: 232

[>] TID: 5552, Priority: 8
    |-> StartAddress: 0x7FFB84833670
    |-> Created: 0d:22h:0m:31s:970ms, uTime: 0d:0h:0m:0s:15ms, kTime: 0d:0h:0m:0s:15ms
    |-> WaitTime: 5843460, WaitReason: WrQueue
    |-> State: Wait, ContextSwitches: 38

[>] TID: 15716, Priority: 8
    |-> StartAddress: 0x7FFB84833670
    |-> Created: 0d:22h:0m:31s:970ms, uTime: 0d:0h:0m:0s:15ms, kTime: 0d:0h:0m:0s:0ms
    |-> WaitTime: 5843460, WaitReason: WrQueue
    |-> State: Wait, ContextSwitches: 30

[...Snipped...]