Shellcodecs

Shellcodecs is a collection of shellcodes, loaders, sources, and generators designed to ease the exploitation and shellcode programming process.

These shellcodes are provided with documentation located at Shellcode

END USER IS LIABLE FOR THEIR OWN ACTIONS

In order to run these shellcodes, the following dependencies are required:

• Linux
• GCC
• Generators require Python 2.7
• Automake

Shellcodecs is a collection of shellcodes, loaders, sources, and generators designed to ease the exploitation and shellcode programming process.

Unless otherwise noted, code is amd64. There are various intel32 etc examples as well. If you're unaware, amd64 is the main linux tree for 64-bit, so if you have an intel, you should still be ok. If you think you may have an out of date version, or that the official version is out-of-sync with the site, the latest sources will be available 100% of the time in the shellcode appendix.

Contents

Loaders

---

• 32-bit executable mmap-based shellcode loader 66 bytes (loader-32.s) (Docs)
• 64-bit executable mmap-based shellcode loader 79 bytes (loader-64.s) (Docs)
• A dynamic loader for locally executable code in C (dynamic-loader.c)
• A dynamic loader for remotely executable code (socket-loader.c)

Environmental stubs

---

• A 32-bit getpc (%eax) example 11 bytes (getpc-32.s) (Docs)
• A 64-bit getpc (%rax) example 12 bytes (getpc-64.s) (Docs)
• Alternative 64-bit getpc 10 bytes (getpc-64-alt.s) (Docs)
• int3 detection code 24 bytes (int3-detect-64.s) (Docs)
• 32-bit lastcall example code 4 bytes (lastcall-32.s) (Docs)
• 64-bit lastcall example code 5 bytes (lastcall-64.s) (Docs)
• 64-bit alphanumeric lastcall example code 13 bytes (lastcall-alphanum.s) (Docs)

Null-free

---

• A very short setuid(0); execve('/bin/sh',0,0); 32 bytes (setuid_binsh.s) (Docs)
• A small write-to-file payload 90 bytes (write-file-32.s) (Docs)

Socket-reuse

---

• Same-socket-shell payload 115 bytes (socket-reuse.s) (Docs)
• Sends socket reuse shellcode (socket-reuse.c)

Self-modifying

---

• 32-bit shellcode unpacker 89 bytes (decoder-32.s) (Docs)
• 64-bit shellcode unpacker (mmap) 102 bytes (decoder-64.s) (Docs)
• 64-bit shellcode unpacker 69 bytes (decoder-64.s) (Docs)
• 32-bit shellcode packer 37 bytes (packer-32.s) (Shellcode/Self-modifying#32_bit)
• 64-bit shellcode packer 55 bytes (packer-64.s) (Shellcode/Self-modifying#64_bit)

Alphanumeric

---

• alphanumeric execve('/bin/sh',0,0) 111 bytes (ascii_binsh.s) (Docs)
• alphanumeric x86* compatible architecture detection stub 15 bytes (architecture_detection) (Docs)

Dynamic

---

• Self-linking exit code 135 bytes (linked-exit.s) (Docs)
• Self-linking socket reuse shellcode 268 bytes (linker-fd-reuse.s) (Docs)
• Self-linking polymorphic socket reuse shellcode 268 bytes (poly-linker-fd-reuse.s)

Generators

---

       Description:   Hash generator for self-linking shellcode 
       Filename:      hash-generator.s
       Documentation: None
       Length:        81 bytes

       Description:   Socket-reuse shellcode generator 
       Filename:      socket-reuse-generator.py
       Documentation: None
       
       Description:   Polymorphic socket reuse generator
       Filename:      poly-socket-reuse-generator.py
       Documentation: None
       
       Description:   Nicely assemble and output shellcode in a variety of formats (raw, hex, and as a C variable) 
       Filename:      shellcode-generator.py
       Documentation: None

Building the code

   * tar xzvf shellcode.tgz
   * cd shellcode
   * make 
   It is also possible to make exclusively x86 or x64 
   binaries using make x86 or make x64.  Please keep in
   mind, there is more support for 64-bit in this 
   package than 32-bit.    

Using the tools

   [loaders]
   [generators]   

Getting help

       Note: We are not your free tech support.
            03:54, 2 December 2012 (MSK)03:54, 2 December 2012 (MSK)03:54, 2 December 2012 (MSK)03:54, 2 December 2012 (MSK)03:54, 2 December 2012 (MSK)~~
          Reminder: Docs are available at 
      http://www.blackhatlibrary.net/shellcode 
  If you're using the tools and there's a problem, try 

re-reading the documentation before asking a question. If you're absolutely sure it is programmatical error and not user error preventing the code from working properly, you can let us know by joining our IRC or talking on the shellcode talk page.

  If you'd like to pay for professional training on the

materials contained in this courseware, please contact our sponsor at www.viralsec.com

Credits

 Lead developer:        Hatter
 Supporting developers: jtRIPper, eax
 Community:   www.blackhatlibrary.net
 Commercial:     www.viralsec.com