OpenRCE

About Articles Book Store Distributed RCE Downloads Event Calendar Forums Live Discussion Reference Library RSS Feeds Search Users What's New

Customize Theme

Flag: Tornado! Hurricane!

Memoryze Memory Forensics Tool

Created: Wednesday, November 26 2008 20:06.40 CST

Author:

peter

# Views: 93554

The goal of this article is to demonstrate how simple malware analysis can be using Memoryze and some good old fashion common sense. Readers should have some knowledge of how malware works, and be somewhat familiar with Memoryze. A good place to familiarize yourself with Memoryze is the user guide included in the installer.

Memoryze is designed to aid in memory analysis in incident response scenarios. However, it has many useful features that can be utilized when doing malware analysis. Memoryze is special in that it does not rely on API calls. Instead Memoryze parses the operating systems' internal structures to determine for itself what the operating system and its running processes and drivers are doing.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
firebits	good job,thx	Sunday, December 7 2014 07:41.08 CST
cirix	good job,thx	Wednesday, August 8 2012 21:33.24 CDT
zezo010	I'm waite for next lessons. Nice work, thanks!	Sunday, August 14 2011 04:26.00 CDT
eaescob	Very nice work, thanks!	Monday, June 27 2011 19:28.08 CDT
slolurner	For folks coming late to the party like me, I w...	Monday, October 25 2010 10:40.36 CDT

The Molecular Virology of Lexotan32: Metamorphism Illustrated

Created: Thursday, August 16 2007 16:58.00 CDT

Author:

orr

# Views: 68318

This paper is a direct descendent of my previous one regarding the metamorphic engine of the W32.Evol virus. I advise you to take a look at it before reading this one, or at least be acquainted with the subject of metamorphism. The focus of this paper is the special engine of the Lexotan32 virus.

The virus was released in 29A#6 Virus Magazine in 2002, the Annus Mirabilis of metamorphic viruses. The virus was created by the prolific VX coder, Vecna, and was one of the last complex creations of this kind. I could further elaborate on the genealogy of this virus, but I think it is sufficient to say that this virus is a culmination of many of the techniques developed throughout the author's career.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
live2skull	amazing article :)	Sunday, May 8 2016 00:28.54 CDT
redbone	good information ....	Tuesday, July 12 2011 02:56.10 CDT
tgnice	cool :)	Saturday, June 18 2011 03:18.50 CDT
lazyworm	very nice!I need it.	Wednesday, June 30 2010 20:25.49 CDT
m4dnut	it's so cool~! thnaks for your effots. i alway...	Wednesday, July 9 2008 20:32.17 CDT

Defeating HyperUnpackMe2 With an IDA Processor Module

Created: Thursday, February 22 2007 19:21.58 CST

Author:

RolfRolles

# Views: 96313

This article is about breaking modern executable protectors. The target, a crackme known as HyperUnpackMe2, is modern in the sense that it does not follow the standard packer model of yesteryear wherein the contents of the executable in memory, minus the import information, are eventually restored to their original forms.

Modern protectors mutilate the original code section, use virtual machines operating upon polymorphic bytecode languages to slow reverse engineering, and take active measures to frustrate attempts to dump the process. Meanwhile, the complexity of the import protections and the amount of anti-debugging measures has steadily increased.

This article dissects such a protector and offers a static unpacker through the use of an IDA processor module and a custom plugin. The commented IDB files and the processor module source code are included. In addition, an appendix covers IDA processor module construction. In short, this article is an exercise in overkill.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
ndaj3	RolfRolles: Thank you for Writing an Great tuto...	Friday, September 4 2009 01:25.09 CDT
eirc	Wow thanks a lot��	Saturday, October 11 2008 05:00.28 CDT
h4x0r	comprehensive analysis, thanks. for those no...	Tuesday, May 15 2007 04:15.56 CDT
PoincareLei	good analysis.. expecting RolfRolles to wri...	Wednesday, April 4 2007 06:26.45 CDT
bLaCkeye	Impressive display of reverse engineering and c...	Friday, February 23 2007 19:47.13 CST

The Viral Darwinism of W32.Evol

Created: Tuesday, February 6 2007 14:26.08 CST

Author:

Orr

# Views: 69988

The W32.Evol virus was discovered around July 2000. Its name is derived from a string found in the virus, but much more can be implied from the name. Up until then, most of the viruses were using Polymorphic engines in order to hide themselves from Anti-Virus scanners. The engine would encrypt the virus with a different key on every generation, and would generate a small, variant decryptor that would consist of different operations but remain functionally equivalent. This technique was beginning to wear out as AV scanners would trace virus-decryption until it was decrypted in memory, visible and clear.

This article explores the features and functionality of the metamorphic engine of the Evol virus, the first virus to utilize a 'true' metamorphic engine according to Symantec.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
nEINEI	good work~~	Friday, November 27 2009 04:04.08 CST
adityaks	nice one man	Wednesday, June 20 2007 06:07.58 CDT
Orr	The mistake is in the paper and not in the engi...	Friday, April 6 2007 16:02.00 CDT
eraser	You are right MazeGen. [code] EB cb JMP cb ...	Wednesday, April 4 2007 13:33.07 CDT
MazeGen	Very interesting article, thanks. There's on...	Friday, March 30 2007 02:57.38 CDT

Kernel User-Mode Debugging Support (Dbgk)

Created: Wednesday, January 31 2007 12:05.10 CST

Author:

AlexIonescu

# Views: 51944

In part three of this three part article series, the kernel-mode interface to Windows debugging is dissected in detail. The reader is expected to have some basic knowledge of C and general NT Kernel architecture and semantics. Also, this is not an introduction on what debugging is or how to write a debugger. It is meant as a reference for experienced debugger writers, or curious security experts. The reader is expected to have some basic knowledge of C and general NT Kernel architecture and semantics. Also, this is not an introduction on what debugging is or how to write a debugger. It is meant as a reference for experienced debugger writers, or curious security experts.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
praveendarshanam	good articles!! all partz r amazing!!!	Friday, September 18 2009 15:18.19 CDT
flyingkisser	very good,very powerful!So,where is part I and ...	Tuesday, January 15 2008 20:17.43 CST
anonymouse	so this is how some of the functions in syser o...	Thursday, February 1 2007 23:35.29 CST
MohammadHosein	thank you for these excellent series of articles	Thursday, February 1 2007 15:29.03 CST
JasonGeffner	Awesome job! I want a "part four"! :)	Thursday, February 1 2007 13:56.34 CST

Windows Native Debugging Internals

Created: Monday, November 13 2006 13:14.18 CST

Author:

AlexIonescu

# Views: 50849

In part two of this three part article series, the native interface to Windows debugging is dissected in detail. The reader is expected to have some basic knowledge of C and general NT Kernel architecture and semantics. Also, this is not an introduction on what debugging is or how to write a debugger. It is meant as a reference for experienced debugger writers, or curious security experts.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
halsten	Thanks for sharing this! Keep it up (Y). -- ...	Monday, January 22 2007 01:55.32 CST
msuiche	That's a very pretty paper you wrote again ther...	Monday, November 13 2006 15:40.46 CST

Windows User Mode Debugging Internals

Created: Tuesday, October 31 2006 18:02.31 CST

Author:

AlexIonescu

# Views: 52283

The internal mechanisms of what allows user-mode debugging to work have rarely ever been fully explained. Even worse, these mechanisms have radically changed in Windows XP, when much of the support was re-written, as well as made more subsystem portable by including most of the routines in ntdll, as part of the Native API. This three part series will explain this functionality, starting from the Win32 (kernel32) viewpoint all the way down (or up) to the NT Kernel (ntoskrnl) component responsible for this support, called Dbgk, while taking a stop to the NT System Library (ntdll) and its DbgUi component.

The reader is expected to have some basic knowledge of C and general NT Kernel architecture and semantics. Also, this is not an introduction on what debugging is or how to write a debugger. It is meant as a reference for experienced debugger writers, or curious security experts.

Full Article ...

Printer Friendly ... Write Comment | View Complete Comments

Username	Comment Excerpt	Date
securex0	Awesome jobs! I am waiting next instruction.	Sunday, April 15 2012 21:55.51 CDT
Civa	Great article Alex! I wonder If you can explai...	Tuesday, March 9 2010 05:07.34 CST
shijiaoan	great	Monday, May 4 2009 21:48.06 CDT
NeOXQuiCk	Nice,thx for sharing.. its helped me a lot.. ...	Tuesday, April 3 2007 17:55.47 CDT
tinybyte	Nice stuff! Waiting for the sequels :)	Friday, December 8 2006 15:25.33 CST

Archived

Title	Author	# Views	Publish Date
Reversing Microsoft Visual C++ Part II: Classes, Methods and RTTI	igorsk	271505	September 21 2006
Microsoft Patching Internals	EliCZ	50910	April 26 2006
Reversing Microsoft Visual C++ Part I: Exception Handling	igorsk	176414	March 6 2006
Technical Analysis of MS06-001	stephanc	35143	February 6 2006
FUTo	peter	51042	January 5 2006
Plausible Deniability	joestewart	34692	November 17 2005
Reverse Engineering Microsoft OLE	joestewart	63904	September 12 2005
File Format Reversing - EverQuest II VPK	daeken	65174	September 6 2005
WINLDRA.EXE: Reversing a Basic Encryption Algorithm	Gerry	57229	August 23 2005
Reversing HDSpoof - A Tutorial	smidgeonsoft	76239	August 2 2005
Creating IDA Plug-ins with C# or VB6	dzzie	57439	July 15 2005
Process Stalker vs. MS05-030	pedram	52393	July 6 2005
Introduction to IDAPython	ero	97709	June 24 2005
OpenRCE Site Launch	pedram	27648	June 17 2005

There are 31,319 total registered users.

Recently Created Topics
[help] Unpacking VMP...	Mar/12
Reverse Engineering ...	Jul/06
hi!	Jul/01
let 'IDAPython' impo...	Sep/24
set 'IDAPython' as t...	Sep/24
GuessType return une...	Sep/20
About retrieving the...	Sep/07
How to find specific...	Aug/15
How to get data depe...	Jul/07
Identify RVA data in...	May/06

Recent Forum Posts
Finding the procedur...	rolEYder
Question about debbu...	rolEYder
Identify RVA data in...	sohlow
let 'IDAPython' impo...	sohlow
How to find specific...	hackgreti
Problem with ollydbg	sh3dow
How can I write olly...	sh3dow
New LoadMAP plugin v...	mefisto...
Intel pin in loaded ...	djnemo
OOP_RE tool available?	Bl4ckm4n

Recent Blog Entries
	halsten	Mar/14
Breaking IonCUBE VM
	oleavr	Oct/24
Anatomy of a code tracer
	hasherezade	Sep/24
IAT Patcher - new tool for ...
	oleavr	Aug/27
CryptoShark: code tracer ba...
	oleavr	Jun/25
Build a debugger in 5 minutes
More ...

Recent Blog Comments
	nieo on:	Mar/22
IAT Patcher - new tool for ...
	djnemo on:	Nov/17
Kernel debugger vs user mod...
	acel on:	Nov/14
Kernel debugger vs user mod...
	pedram on:	Dec/21
frida.github.io: scriptable...
	capadleman on:	Jun/19
Using NtCreateThreadEx for ...
More ...

Imagery

SoySauce Blueprint
Jun 6, 2008

[+] expand

View Gallery (11) / Submit