.frame Specifies the command line of an executable process. Go exception handled @$t0->CSDVersion; Suppose we wanted to bypass a IsDebuggerPresent check. Step to next return - similar to the GU (go up), but staying in context of the current function This option should be used with care, since it will override all the symbol handler defaults. It seems that the following applies for windows XP SP2: This is used to debug a process that is already running. I've set the breakpoint like this: bu kernel32!LoadLibraryExW ";as /mu ${/v:MyAlias} poi(@esp+4); .if ( $spat( @"${MyAlias}", "*protect*" ) != 0 ) { .echo ok - dll loaded; kP; } .else { g }". It just lets the debugger know that the symbol files may have changed, or that a new module should be added to the module list. u = Unicode chars sx To get source information you must additionally enable page heap in step 1 (gflags.exe /i MyApp.exe +ust +hpa), Select "Create user mode stack trace database" and "Enable page heap" for your image in GFlags (gflags.exe /i MyApp.exe +ust +hpa), Enable "Create user mode stack trace database" for your image in GFlags (gflags.exe /i MyApp.exe +ust). -i = Does not indent the subtypes Type = data format in which to display the register (i.e. x [Options] Module!Symbol Suppresses the "Reload Source?" @$t0->BeingDebugged. SymPattern can contain wildcards Relative paths are relative to the directory that you started the debugger in. ~Thread = The specified thread is thawed and all others frozen. After this call is returned execution will continue until another call is reached. ignore event After this action is attempted, a success or failure message is displayed. Create a free website or blog at WordPress.com. locate all stacks that contain Symbol or module dialog box and automatically reloads source files. .. +0x018 Ldr : 0x00000000`77af2640 _PEB_LDR_DATA. 0:003> eb (@$t0+0x02) 0; Output the current BeingDebugged status: When accessing pseudo-registers recall both ? @$t0->CSDVersion; Suppose we wanted to bypass a IsDebuggerPresent check. CmdString = Cmd1; Cmd2; .. Delete specified memory ranges (any saved range containing Addr or overlapping with Range), !heap -? However this can be changed using the r? s -[Flags]d Range 'Pattern' Dump info for region with Addr +0x001 ReadImageFileExecOptions : 0 '' Causes the symbol handler to ignore the CV record. The .scriptload command will load and execute the specified script file. pa StopAddr However the syntax, especially when written in short hand can be confusing at best. Number should be a hexadecimal number prefixed with 0x -- a decimal without the 0x is permitted, but the symbol options are binary flags and therefore hexadecimal is recommended. The initial hyphen can be replaced with a forward-slash (/). And there we go. +0x000 InheritedAddressSpace : 0 '' Do you have any ideas ? Sets all the symbol handler options at once. If the path is omitted, the current directory is assumed. Summary info, i.e. .expr /s masm, Choose default expression evaluator Flags -robp Dump current filter list = functions that are skipped when tracing (t, ta, tc) After WinDbg Preview is installed, WinDbgX.exe is available to run from any directory location. x /a .. -sflags 0x Number +0x003 SpareBits : 0y000 One line scripts can be executed when we type them in WinDbg command window or you load them from a file using $< or $$< commands: $$ Hello World script; .block { .printf "Hello World!\n"} We can see that in one line scripts comments and commands must be ended with a semicolon unless the command or comment is final. By default pseudo-registers are integers. which could be further shortened to the 2nd char determines the pointer size used: sort by size ("size" of a function symbol is the size of the function in memory). This is used to launch a new process and debug it. -QY lmD, List modules; verbose | with loaded symbols | k-kernel or u-user only symbol info | image path; pattern that the module name must match Thanks for reading! If the workspace name contains spaces, enclose it in quotation marks. Introduction to WinDbg Scripts (aka Command Programs) – Part I: Pseudo-Registers, http://vreugdenhilresearch.nl/windbg-scripting-finding-rop-gadgets/. ~Thrd == thread that the bp applies too. Display all saved memory ranges ~* [Command] Passes = Activate breakpoint after #Passes (it is ignored before) One way to accomplish this by clearing the BeingDebugged flag within the PEB. Log Append. Dump summary info for process For details, and for other ways to change this path, see Source Path. Causes the debugger to perform a strict evaluation of all symbol files and ignore any questionable symbols. thread that caused the current event or exception Display . quick way to find out which threads are spinning out of control or consuming too much CPU time. source mode vs. assembly mode, Go Use processor mode of the code that is executing for the most recent event .echo "String". -cs -a ADDR dv Pattern Search heap block containing the address (v = search the whole process virtual space) -v = Verbose output. Set noisy symbol loading (debugger displays info about its search for symbols) ScriptFile should include the .js file name extension. rF oR = dump return register values (EAX value) in the appropriate type e[ a | u | za | zu ] Addr "String", Edit memory Show number formats = evaluates a numerical expression or symbol and displays it in multiple numerical formats (hex, decimal, octal, binary, time, ..) If the path contains spaces, it should be enclosed in quotation marks. Does someone here know how to format the output of windbg command in its script? kp ... d*a Prohibits all .shell commands. $t0 = (ntdll!_peb *) @$peb -QS -c = Compact output (all fields in one line) Output directory optional. HeapAlloc, HeapFree, new, and delete log Specifies the name of the process to be debugged. Workspaces are not automatically saved. A WinDbg script or command program (as the help file likes to call them) are powerful tools that can dramatically increase ones efficiency during a debugging session. However the syntax, especially when written in short hand can be confusing at best. Example: !Ntsdexts.help handle (show detailed help about !Ntsdexts.handle), ld ModuleName For details, and for other ways to change this path, see Symbol Path. !heap -i [HeapAddr] See Ending a Debugging Session in WinDbg for details. If the workspace name contains spaces, enclose it in quotation marks. by memory order Dump last error for all threads When debugging a user-mode or kernel-mode minidump file, this option will also prevent the debugger from loading any modules whose images can't be mapped. The downside is that SetLastError is only called from within KERNEL32.DLL. !heap -h -IA[S] Useful to: Display or set symbol search path 0:003> ? For instance: Crashing and Rebooting the Target Computer, Debugging a User-Mode Process Using WinDbg, Analyzing a Kernel-Mode Dump File with WinDbg. Example: .hh dt, Dump version info of debugger and loaded extension DLLs, Dump command line that was used to start the debugger. specify frame # Flags must be surrounded by a single set of brackets without spaces. +0x003 ImageUsesLargePages : 0y0 Search for potentially leaked heap blocks, !heap Heap -b [alloc | realloc | free] [Tag] MaxCount = max # elements to dump 0:003> ?? For details, and for other ways to change this number, see Using Debugger Commands. bp is set when the module gets loaded, bm SymPattern dump stack trace with INDEX. Value to assign to the register (i.e. -noinh -trm When I first started moving from Olly to WinDbg, I’d look at something like the WinDbg script at http://vreugdenhilresearch.nl/windbg-scripting-finding-rop-gadgets/ with a mix of wonder and confusion. The debugger will replace any string of the form ${$argn} in the script file with the corresponding argnbefore executing the script. -k [ConnectType] thread whose ordinal is Number +0x003 IsLegacyProcess : 0y0 Step to next call - executes the program until a call instruction is reached @$ip <----- Faster Access Extended page heap help Log Open. If the path contains spaces, it should be enclosed in quotation marks. The default is 20 (0x14). .symopt+ Flags Specifies the thread ID of a thread to be resumed when the debugging session is started.

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