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Reversing & Malware Analysis Training Part 5 - Reverse Engineering Tools Basics

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This presentation is part of our Reverse Engineering & Malware Analysis Training program. For more details refer our Security Training page http://securityxploded.com/security-training.php

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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  RE, Malware Analysis, Network Security  Email: swapnilpathak101@gmail.com www.SecurityXploded.com
Presentation Outline  PE Tools  PE Editor  Disassemblers  IDA Pro  Debuggers  OllyDbg  Other Useful Tools www.SecurityXploded.com
PE Tools  Portable Executable Editor  Allow user to view, edit data structures present in PE file format  Some Common Use Cases:  Change entry point of the executable  View Import/Export/Sections within EXE  Change characteristics of 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  Popular commercial software used for Reverse Engineering.  Disassembler and Debugger in one tool  Supports variety of executable formats for different processors and OS  Provides both Text & Graphical view of the code flow.  View strings, Imports, Exports referenced in the executable  Support Plugins  Some of the useful plugins  X86 emulator  IDAPython  IDARub  IDA Scripts  Windbg www.SecurityXploded.com
IDA Pro Functions  IDA Windows & purpose – IDA View, Hex View, Imports, Strings, Functions windows etc.  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 Popular Ring 3 Debugger used in Reversing  Provides the below mentioned functionalities  Debugging program step by step (Single Stepping)  Software, Hardware and Memory based Breakpoints  Examine the current state of the program wrt variables, memory etc.  Change the flow or state of Program by directly editing Instructions, Registers or Memory.  Support Plugins, Here are popular ones,  OllyDump  OllyAdvanced  OllyScript www.SecurityXploded.com
Ollydbg Cont.  Different Windows – CPU, Registers, Dump, Stack screens  Trace Into, Trace Over, Exceptions  Integrate windows API help file in ollydbg  Shortcuts (imp. Only)  F7 – Step into [call]  F8 – Single step [execute call]  F9 – Run  F2 – Breakpoint www.SecurityXploded.com
Ollydbg in Action www.SecurityXploded.com
UPX Unpacking Ollyscript Here is example for Unpacking UPX based Malwares using OllyScript in OllyDbg var hwdBP // Local variable to store hardware breakpoint var softBP // Local variable to strore software breakpoint sti // Step into F7 command findop eip, #61# // find next POPAD mov hwdBP, $RESULT // Store $RESULT to hardware breakpoint local variable bphws hwdBP, "x“ // Set hardware breakpoint (execute) on the next POPAD run // Run F9 command findop eip, #E9????????# // Find the next JMP mov softBP, $RESULT // Store $RESULT to software breakpoint local variable bp softBP run // Run to JMP instruction sti // Step into the OEP cmt eip, "<<>>" msg "OEP found, you can dump the file starting from this address" ret Source : http://x9090.blogspot.in/2009/07/ollyscript-tutorial-unpack-upx.html www.SecurityXploded.com
Useful Tools  Packer Identifier Tools  RDG packer detector  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  RE, Malware Analysis, Network Security  Email: swapnilpathak101@gmail.com www.SecurityXploded.com
  • 6. Presentation Outline  PE Tools  PE Editor  Disassemblers  IDA Pro  Debuggers  OllyDbg  Other Useful Tools www.SecurityXploded.com
  • 7. PE Tools  Portable Executable Editor  Allow user to view, edit data structures present in PE file format  Some Common Use Cases:  Change entry point of the executable  View Import/Export/Sections within EXE  Change characteristics of 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
  • 8. PE Editor www.SecurityXploded.com
  • 9. IDA Pro  Popular commercial software used for Reverse Engineering.  Disassembler and Debugger in one tool  Supports variety of executable formats for different processors and OS  Provides both Text & Graphical view of the code flow.  View strings, Imports, Exports referenced in the executable  Support Plugins  Some of the useful plugins  X86 emulator  IDAPython  IDARub  IDA Scripts  Windbg www.SecurityXploded.com
  • 10. IDA Pro Functions  IDA Windows & purpose – IDA View, Hex View, Imports, Strings, Functions windows etc.  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
  • 11. IDA Pro in Action www.SecurityXploded.com
  • 12. Ollydbg  Most Popular Ring 3 Debugger used in Reversing  Provides the below mentioned functionalities  Debugging program step by step (Single Stepping)  Software, Hardware and Memory based Breakpoints  Examine the current state of the program wrt variables, memory etc.  Change the flow or state of Program by directly editing Instructions, Registers or Memory.  Support Plugins, Here are popular ones,  OllyDump  OllyAdvanced  OllyScript www.SecurityXploded.com
  • 13. Ollydbg Cont.  Different Windows – CPU, Registers, Dump, Stack screens  Trace Into, Trace Over, Exceptions  Integrate windows API help file in ollydbg  Shortcuts (imp. Only)  F7 – Step into [call]  F8 – Single step [execute call]  F9 – Run  F2 – Breakpoint www.SecurityXploded.com
  • 14. Ollydbg in Action www.SecurityXploded.com
  • 15. UPX Unpacking Ollyscript Here is example for Unpacking UPX based Malwares using OllyScript in OllyDbg var hwdBP // Local variable to store hardware breakpoint var softBP // Local variable to strore software breakpoint sti // Step into F7 command findop eip, #61# // find next POPAD mov hwdBP, $RESULT // Store $RESULT to hardware breakpoint local variable bphws hwdBP, "x“ // Set hardware breakpoint (execute) on the next POPAD run // Run F9 command findop eip, #E9????????# // Find the next JMP mov softBP, $RESULT // Store $RESULT to software breakpoint local variable bp softBP run // Run to JMP instruction sti // Step into the OEP cmt eip, "<<>>" msg "OEP found, you can dump the file starting from this address" ret Source : http://x9090.blogspot.in/2009/07/ollyscript-tutorial-unpack-upx.html www.SecurityXploded.com
  • 16. Useful Tools  Packer Identifier Tools  RDG packer detector  PEID  ExeScan www.SecurityXploded.com
  • 17. PEiD – PE Packer Identifier Tool www.SecurityXploded.com
  • 18. Reference  Complete Reference Guide for Reversing & Malware Analysis Training www.SecurityXploded.com