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Reversing & malware analysis training part 5 reverse engineering tools basics

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Abdulrahman Bassam
Abdulrahman Bassam

This document outlines a training presentation on reversing and malware analysis. It introduces various tools used for reverse engineering like PE editors, disassemblers, debuggers and unpacking scripts. IDA Pro and OllyDbg are demonstrated as popular disassembler and debugger tools. The document also provides contact information for the trainer and references for further details on the training course.

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Disclaimer The Content, Demonstration, Source Code and Programs presented here is "AS IS" without any warranty or conditions of any kind. Also the views/ideas/knowledge expressed here are solely of the trainer’s only and nothing to do with the company or the organization in which the trainer is currently working. However in no circumstances neither the trainer nor SecurityXploded is responsible for any damage or loss caused due to use or misuse of the information presented here. www.SecurityXploded.com
Acknowledgement  Special thanks to null & Garage4Hackers community for their extended support and cooperation.  Thanks to all the Trainers who have devoted their precious time and countless hours to make it happen. www.SecurityXploded.com
Reversing & Malware Analysis Training This presentation is part of our Reverse Engineering & Malware Analysis Training program. Currently it is delivered only during our local meet for FREE of cost. For complete details of this course, visit our Security Training page. www.SecurityXploded.com
Who am I Swapnil Pathak  Member SecurityXploded  Security Researcher @ McAfee Labs  RE, Malware Analysis, Network Security  Email: swapnilpathak101@gmail.com www.SecurityXploded.com
Course Q&A  Keep yourself up to date with latest security news  http://www.securityphresh.com  For Q&A, join our mailing list.  http://groups.google.com/group/securityxploded www.SecurityXploded.com
Presentation Outline  PE Tools  PE Editor  Disassemblers  IDA Pro  Debuggers  OllyDbg  OtherUseful Tools www.SecurityXploded.com
PE Tools  PortableExecutableEditor  Allow userto view, edit data structurespresentin PE file format  SomeCommon Use Cases:  Changeentry point of the executable  View Import/Export/Sections withinEXE  Changecharacteristicsof a file i.e. Dll to Exe  Fix anomalies of PE files  PE editors  Hiew, PE Editor, CFF Explorer, StudPE,LordPE etc www.SecurityXploded.com
PE Editor www.SecurityXploded.com
IDA Pro  Popularcommercialsoftwareused for Reverse Engineering.  Disassemblerand Debuggerin one tool  Supports varietyof executableformats for different processors and OS  Providesboth Text & Graphical view of the code flow.  View strings,Imports,Exportsreferenced in the executable  SupportPlugins  Someof the useful plugins  X86 emulator  IDAPython  IDARub  IDA Scripts  Windbg www.SecurityXploded.com
IDA Pro Functions  IDAWindows& purpose – IDA View, Hex View, Imports, Strings, Functions windowsetc.  Graphs & Text view (use “space”to switch between views)  Xref To & Xref From – powerful feature  Jump & Search  Edit function names (N), Add comments (;) www.SecurityXploded.com
IDA Pro in Action www.SecurityXploded.com
Ollydbg  Most PopularRing 3 Debuggerused in Reversing  Providesthebelow mentionedfunctionalities  Debuggingprogramstep by step (SingleStepping)  Software, Hardwareand Memory based Breakpoints  Examinethecurrent stateof the program wrt variables,memory etc.  Changetheflow or stateof Programby directly editingInstructions, Registers or Memory.  SupportPlugins,Here are popularones,  OllyDump  OllyAdvanced  OllyScript www.SecurityXploded.com
Ollydbg Cont.  DifferentWindows– CPU, Registers, Dump, Stack screens  TraceInto, Trace Over, Exceptions  IntegratewindowsAPIhelp file in ollydbg  Shortcuts (imp. Only)  F7 – Step into [call]  F8 – Singlestep [executecall]  F9 – Run  F2 – Breakpoint www.SecurityXploded.com
Ollydbg in Action www.SecurityXploded.com
UPX Unpacking Ollyscript var hwdBP //Local variableto storehardwarebreakpoint var softBP //Local variableto stroresoftwarebreakpoint sti //Step into F7 command findop eip, #61# //find next POPAD mov hwdBP, $RESULT // Store $RESULTto hardwarebreakpointlocalvariable bphws hwdBP, "x“ // Set hardwarebreakpoint(execute)on thenext POPAD run //Run F9 command findop eip, #E9????????# //Find the next JMP mov softBP, $RESULT // Store $RESULTto softwarebreakpointlocal variable bp softBP run //Run to JMP instruction sti //Step into the OEP cmteip, "<<>>" msg"OEP found, you can dump thefilestarting from thisaddress" ret Source: http://x9090.blogspot.in/2009/07/ollyscript-tutorial-unpack-upx.html www.SecurityXploded.com Here is example for Unpacking UPX based Malwares using OllyScript in OllyDbg
Useful Tools  Packer IdentifierTools  RDG packerdetector  PEID  ExeScan www.SecurityXploded.com
PEiD – PE Packer Identifier Tool www.SecurityXploded.com
Reference  Complete Reference Guide for Reversing & Malware Analysis Training www.SecurityXploded.com
Thank You ! www.SecurityXploded.com

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Reversing & malware analysis training part 5 reverse engineering tools basics

  • 2. Disclaimer The Content, Demonstration, Source Code and Programs presented here is "AS IS" without any warranty or conditions of any kind. Also the views/ideas/knowledge expressed here are solely of the trainer’s only and nothing to do with the company or the organization in which the trainer is currently working. However in no circumstances neither the trainer nor SecurityXploded is responsible for any damage or loss caused due to use or misuse of the information presented here. www.SecurityXploded.com
  • 3. Acknowledgement  Special thanks to null & Garage4Hackers community for their extended support and cooperation.  Thanks to all the Trainers who have devoted their precious time and countless hours to make it happen. www.SecurityXploded.com
  • 4. Reversing & Malware Analysis Training This presentation is part of our Reverse Engineering & Malware Analysis Training program. Currently it is delivered only during our local meet for FREE of cost. For complete details of this course, visit our Security Training page. www.SecurityXploded.com
  • 5. Who am I Swapnil Pathak  Member SecurityXploded  Security Researcher @ McAfee Labs  RE, Malware Analysis, Network Security  Email: swapnilpathak101@gmail.com www.SecurityXploded.com
  • 6. Course Q&A  Keep yourself up to date with latest security news  http://www.securityphresh.com  For Q&A, join our mailing list.  http://groups.google.com/group/securityxploded www.SecurityXploded.com
  • 7. Presentation Outline  PE Tools  PE Editor  Disassemblers  IDA Pro  Debuggers  OllyDbg  OtherUseful Tools www.SecurityXploded.com
  • 8. PE Tools  PortableExecutableEditor  Allow userto view, edit data structurespresentin PE file format  SomeCommon Use Cases:  Changeentry point of the executable  View Import/Export/Sections withinEXE  Changecharacteristicsof a file i.e. Dll to Exe  Fix anomalies of PE files  PE editors  Hiew, PE Editor, CFF Explorer, StudPE,LordPE etc www.SecurityXploded.com
  • 10. IDA Pro  Popularcommercialsoftwareused for Reverse Engineering.  Disassemblerand Debuggerin one tool  Supports varietyof executableformats for different processors and OS  Providesboth Text & Graphical view of the code flow.  View strings,Imports,Exportsreferenced in the executable  SupportPlugins  Someof the useful plugins  X86 emulator  IDAPython  IDARub  IDA Scripts  Windbg www.SecurityXploded.com
  • 11. IDA Pro Functions  IDAWindows& purpose – IDA View, Hex View, Imports, Strings, Functions windowsetc.  Graphs & Text view (use “space”to switch between views)  Xref To & Xref From – powerful feature  Jump & Search  Edit function names (N), Add comments (;) www.SecurityXploded.com
  • 12. IDA Pro in Action www.SecurityXploded.com
  • 13. Ollydbg  Most PopularRing 3 Debuggerused in Reversing  Providesthebelow mentionedfunctionalities  Debuggingprogramstep by step (SingleStepping)  Software, Hardwareand Memory based Breakpoints  Examinethecurrent stateof the program wrt variables,memory etc.  Changetheflow or stateof Programby directly editingInstructions, Registers or Memory.  SupportPlugins,Here are popularones,  OllyDump  OllyAdvanced  OllyScript www.SecurityXploded.com
  • 14. Ollydbg Cont.  DifferentWindows– CPU, Registers, Dump, Stack screens  TraceInto, Trace Over, Exceptions  IntegratewindowsAPIhelp file in ollydbg  Shortcuts (imp. Only)  F7 – Step into [call]  F8 – Singlestep [executecall]  F9 – Run  F2 – Breakpoint www.SecurityXploded.com
  • 16. UPX Unpacking Ollyscript var hwdBP //Local variableto storehardwarebreakpoint var softBP //Local variableto stroresoftwarebreakpoint sti //Step into F7 command findop eip, #61# //find next POPAD mov hwdBP, $RESULT // Store $RESULTto hardwarebreakpointlocalvariable bphws hwdBP, "x“ // Set hardwarebreakpoint(execute)on thenext POPAD run //Run F9 command findop eip, #E9????????# //Find the next JMP mov softBP, $RESULT // Store $RESULTto softwarebreakpointlocal variable bp softBP run //Run to JMP instruction sti //Step into the OEP cmteip, "<<>>" msg"OEP found, you can dump thefilestarting from thisaddress" ret Source: http://x9090.blogspot.in/2009/07/ollyscript-tutorial-unpack-upx.html www.SecurityXploded.com Here is example for Unpacking UPX based Malwares using OllyScript in OllyDbg
  • 17. Useful Tools  Packer IdentifierTools  RDG packerdetector  PEID  ExeScan www.SecurityXploded.com
  • 18. PEiD – PE Packer Identifier Tool www.SecurityXploded.com
  • 19. Reference  Complete Reference Guide for Reversing & Malware Analysis Training www.SecurityXploded.com