For example, if you see functions opening an internet connection and downloading files from an URL, the sample may be a downloader. Examining a malware’s imported functions may give a general idea of the malware’s functionality.
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The Names Window shows the list of imported and exported functions for a given module. Choosing the “View names” (Ctrl-N) opens the Names Window. While in this window, right-clicking on a module opens a context menu. Red text means that the module was loaded dynamically. Figure 5: Names WindowThe Executable Modules Window shows the base virtual address, the virtual size (the size the binary takes up in memory), the Entry Point’s virtual address, the module name, file version, and file path for each module loaded in the process. OpenRCE has OllyDump, Olly Advanced, and many other useful plug-ins to help hide the debugger from malware attacks or to help automate your dynamic analysis process.
#RETROUVER SERIAL AVEC OLLYDBG 2 MANUAL#
The OllyDump plug-in will come in handy during manual unpacking and it contains two heuristics for locating the OEP (Original Entry Point). Two recommended plug-ins you should get are OllyDump to dump a process’ memory and Olly Advanced to get around any anti-debugging a malware sample may throw against you. Any plug-in loading errors can usually be attributed to placing the plug-in in a directory other than Olly’s default plug-ins directory. The Log window is also useful in checking to ensure any plug-ins you installed were loaded correctly. If you need to do some trouble-shooting during your debugging session, the Log Window may be useful in tracking down unusual or unexpected behaviors while stepping through mal-code. This window displays all debugging events such as module loads, thread creations, breakpoint hits, and errors. AvailableAnd if you want to follow along, I created a simple little CrackMe program that you can download from A Tour of OllyDbgThe following figure shows the various components inside the OllyDbg debugger.įigure 3: Log WindowClicking on the Log (Alt+L) option will bring up the Log Window.
#RETROUVER SERIAL AVEC OLLYDBG 2 HOW TO#
You should have a good understanding of Intel x86 assembly opcodes not how to program but at the very least, know how to it. We will learn many of Olly’s features while attempting to unlock a “trial” software whose trial time has expired.
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The goal today is to provide a tour of OllyDbg and how the tool can be used in reverse engineering software or malware. OllyDbg is a 32-bit disassembler/debugger for Microsoft Windows binary files.