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A collection of tutorials aimed particularly for newbie reverse engineers. 01. Olly + assembler + patching a basic reverseme 02. Keyfiling the reverseme + assembler 03. Basic nag removal + header problems 04. Basic + aesthetic patching 05. Comparing on changes in cond jumps, animate over/in, breakpoints 06. "The plain stupid patching method", searching for textstrings 07. Intermediate level patching, Kanal in PEiD 08. Debugging with W32Dasm, RVA, VA and offset, using LordPE as a hexeditor 09. Explaining the Visual Basic concept, introduction to SmartCheck and configuration 10. Continued reversing techniques in VB, use of decompilers and a basic anti-anti-trick 11. Intermediate patching using Olly's "pane window" 12. Guiding a program by multiple patching. 13. The use of API's in software, avoiding doublechecking tricks 14. More difficult schemes and an introduction to inline patching 15. How to study behaviour in the code, continued inlining using a pointer 16. Reversing using resources 17. Insights and practice in basic (self)keygenning 18. Diversion code, encryption/decryption, selfmodifying code and polymorphism 19. Debugger detected and anti-anti-techniques 20. Packers and protectors : an introduction 21. Imports rebuilding 22. API Redirection 23. Stolen bytes 24. Patching at runtime using loaders from lena151 original 25. Continued patching at runtime & unpacking armadillo standard protection 26. Machine specific loaders, unpacking & debugging armadillo 27. tElock + advanced patching 28. Bypassing & killing server checks 29. Killing & inlining a more difficult server check 30. SFX, Run Trace & more advanced string searching 31. Delphi in Olly & DeDe 32. Author tricks, HIEW & approaches in inline patching 33. The FPU, integrity checks & loader versus patcher 34. Reversing techniques in packed software & a S&R loader for ASProtect 35. Inlining inside polymorphic code 36. Keygenning 37. In-depth unpacking & anti-anti-debugging a combination packer / protector 38. Unpacking continued & debugger detection by DLL's and TLS 39. Inlining a blowfish scheme in a packed & CRC protected dll + unpacking Asprotect SKE 2.2 40. Obfuscation and algorithm hiding

============================ AT4RE Power Loader v0.1 (Release Date: 26/03/2025) ============================ [+] Console interface [+] Loader Coded in C++ with CRT (big Size: 85 KB when compressed about 190 KB uncompressed). [+] Supports patching single or multiple Relative Virtual Addresses (RVAs). Root Folder Contents: [+] ATPL.EXE (AT4RE Power Loader) [+] Version History.txt ============================ AT4RE Power Loader v0.2 (Release Date: 16/04/2025) ============================ The most powerful loader against strong and hard protectors. It also works with medium-level protectors, packers, compressors, and even unprotected executable files. Main Features: [+] GUI Coded in Borland Delphi 7 [+] From the GUI, you can browse to select the target file (maximum filename length is 255 characters). [+] You can also copy and paste the file name into the input field. [+] Choose between x32 and x64 loader versions. [+] Loader data can be entered only in the format shown in filed or in the screenshot. [+] Set a base timeout in milliseconds (Minimum: 00, Maximum: 9999 — i.e., 9.99 seconds). [+] Set 1-byte opcodes in the Opcode field using HEX characters (Opcode is the Original First Byte of RVA1). [+] Configure Opcode Timeout in milliseconds (Minimum: 00, Maximum: 9999 — i.e., 9.99 seconds). [+] Set the Loader Timer Delay in microseconds (Min: 00, Max: 9,999,999 — i.e., 9.99 seconds). [+] Configure the loader to start as Administrator. [+] Directly pack the loader with UPX. [+] Generate Loader.exe [+] Save or open projects for future use from File menu. [+] Set the GUI to "most on top" from the View menu. [+] Access the official website, report bugs, and find more information via about in the Help menu. Loader Details: [+] Coded in C++ using the Windows Pure API. [+] Loader size is 10 KB uncompressed, and 5 KB when compressed. [+] Supports Windows 7, 8, 10, and 11 (both x32 and x64). Features include: [+] Anti-ASLR [+] Anti-Anti-Debug [+] Anti-CRC Check [+] Automatically detects the base address. [+] Detects when the protector unpacks code into memory. [+] Can apply temporary patches after a specified delay in microseconds (Patch and restor original bytes). [+] Can apply permanent patches only with 00 Flag [+] Supports patching single or multiple Relative Virtual Addresses (RVAs). [+] Capable of patching up to 2048 bytes. [+] Can run as Administrator or Normal user mode. Root Folder Contents: [+] Project folder (Save or open projects for future use) [+] UPX folder (includes upx32.exe and upx64.exe) [+] ATPL.EXE (AT4RE Power Loader) [+] Version History.txt ============================ AT4RE Power Loader v0.3 (Release Date: 10/05/2025) ============================ The most powerful loader against strong and hard protectors. It also works with medium-level protectors, packers, compressors, and even unprotected executable files. Main Features: [+] Added Support Patching DLLs (Only DLLs Loaded by Target.exe). [+] Added Drag Drop Feature: For .EXE, .REG, .ICO Files. [+] Added Insert Loader Data feature (For Respect the Correct Format). [+] Added Registry Keys Manager (Max size: 1 KB / 1024 characters). [+] Added Delete Files feature (Max size: 1 KB / 1024 characters). [+] Added Icon Changer. [+] Added New Project option from File menu (Clears all fields). [+] Added Commands Shortcut Ctrl+N, Ctrl+O, Ctrl+S in File menu. [+] Added Contact Us section from Help menu. [+] Updated About from Help menu from box to a form. [+] Updated display fonts for Loader Data, Registry, and Files. [-] Removed "My Target run as admin". Loader Details: [+] Size is now 17 KB uncompressed, 7 KB when compressed. [+] Loader now Support Patching DLLs (Only DLLs Loaded by Target.exe). [+] Loader can now add or delete registry keys. [+] Loader can delete files. [+] Automatically requests Run as Administrator when needed (e.g.,Target need administrator privilege, modifying registry or deleting files from protected folders). [+] Icon support added. Root Folder Contents: [+] Icons folder (includes 5 icons). [+] Lib folder (includes bass.dll). [+] Project folder (Save or open projects for future use). [+] ResH folder (includes ResHacker.exe). [+] UPX folder (includes upx32.exe and upx64.exe). [+] ATPL.EXE (AT4RE Power Loader). [+] Version History.txt ============================ AT4RE Power Loader v0.4 (Release Date: 16/05/2025) ============================ The most powerful loader against strong and hard protectors. It also works with medium-level protectors, packers, compressors, and even unprotected executable files. Main Features: [+] Added Import menu. [+] Added Support .1337 patch files exported by x64dbg. [+] Set Opcode automatically when Load .1337 file. [+] Added OpenDialog when Double Click on: - Target Name field. - Loader Data field. - Registry field. - Custom icon field. Loader Details: [+] Fixed bug with registry feature. [+] Default icon changed. [+] Compressed Loader with Default icon 8 KB. Root Folder Contents: [+] Icons folder (includes 5 icons). [+] Lib folder (includes bass.dll). [+] Project folder (Save or open projects for future use). [+] ResH folder (includes ResHacker.exe). [+] UPX folder (includes upx32.exe and upx64.exe). [+] ATPL.EXE (AT4RE Power Loader). [+] Version History.txt

File protected by .NET Reactor v7.3 having Code Virtualization enabled. By nature the application using Dependency Injection (this time heavily developed), the 3rd party files embedded to main exe (see shot2), in addition System.Data.SQLite.dll lying near application. Find registration combination and reply it with the success message! Custom antidebugger

If you need to view information about various EXE files, Exeinfo PE is a small toll that does exactly that. It can analyse EXE files and acquires detailed information about their properties, offering you the possibility to save overlays and create backups. The application is portable so you don’t need to install it, plus your Windows registry will remain unchanged. The simple interface has a plain window where you can drag and drop an EXE or DLL file, or load it via the built-in file browser. Then the application will display the file size, file offset, entry point, linker information, EP section, sub-system and overlay. Furthermore, you can also insert HEX data to analyse BIN information. A section viewer can be opened, where users can see every virtual offset and size, flags, name, RAW data offset and size, first bytes and section status. Header information is also available such as security, debug, exception, T:S table, size of headers, number of directories and so on. The application can be set to perform a fast scan from the Options menu. Moreover, from the same place, you can configure Exeinfo PE to ignore EXE errors, set it to be always on top, choose the big interface or integrate it into the shell. Plugins: https://github.com/ExeinfoASL/plugins Support Topic: https://forum.tuts4you.com/topic/8412-exeinfo-pe/

Code obfuscation techniques are increasingly being used in software for such reasons as protecting trade secret algorithms from competitors and deterring license tampering by those wishing to use the software for free. However, these techniques have also grown in popularity in less legitimate areas, such as protecting malware from detection and reverse engineering. This work examines two such techniques “packing and virtualization-obfuscation“ and presents new behavioral approaches to analysis that may be relevant to security analysts whose job it is to defend against malicious code. These approaches are robust against variations in obfuscation algorithms, such as changing encryption keys or virtual instruction byte code. Packing refers to the process of encrypting or compressing an executable file. This process scrambles the bytes of the executable so that byte-signature matching algorithms commonly used by anti-virus programs are ineffective. Standard static analysis techniques are similarly ineffective since the actual byte code of the program is hidden until after the program is executed. Dynamic analysis approaches exist, but are vulnerable to dynamic defenses. We detail a static analysis technique that starts by identifying the code used to "unpack" the executable, then uses this unpacker to generate the unpacked code in a form suitable for static analysis. Results show we are able to correctly unpack several encrypted and compressed malware, while still handling several dynamic defenses. Virtualization-obfuscation is a technique that translates the original program into virtual instructions, then builds a customized virtual machine for these instructions. As with packing, the byte-signature of the original program is destroyed. Furthermore, static analysis of the obfuscated program reveals only the structure of the virtual machine, and dynamic analysis produces a dynamic trace where orig­inal program instructions are intermixed, and often indistinguishable from, virtual machine instructions. We present a dynamic analysis approach whereby all instructions that affect the external behavior of the program are identified, thus building an approximation of the original program that is observationally equivalent. We achieve good results at both identifying instructions from the original program, as well as eliminating instructions known to be part of the virtual machine.

This is a professional PE file explorer that lets you dig into all data directories available in the PE/PE64 file and edit them. Export, Import, Resource, Exception, Certificate(Relies on Windows API), Base Relocation, Debug, TLS, Load Config, Bound Import, IAT, Delay Import and CLR are supported. Two companion plugins are also provided. FileInfo, to query the file in the well-known malware repositories and take one-click technical information about the file such as its size, entropy, attributes, hashes, version info and so on. YaraPlugin, to test Yara rules against opened file. Puppy is robust against malformed and crafted PE files which makes it handy for reversers, malware researchers and those who want to inspect PE files in more details. Puppy is free and tries to be small, fast, nimble and friendly as your puppy! Website: https://www.mzrst.com/