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ASM Bots: Core War, rebooted. x86 bots fight in shared memory. asmbots.io

Created: Monday, July 19 2010 17:01.22 CDT

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HiperDrop 0.0.1

Author:

GynvaelColdwind

# Views: 10156

Hi :)

I've published a tool that I've made a while ago, and forgot it later. I've came across it yesterday while looking through the directories.

Anyway, it's called HiperDrop, and it's a simple command line process memory dumper for Windows.

Basically, it attaches to a process, read the whole memory (unlike LordPE / OllyDump, this tool is design to download the whole memory of the process), and saves it to disk.

I've written some more details on my tech blog :)

You can download the tool (it's open source) here:
http://gynvael.coldwind.pl/download.php?f=HiperDrop-0.0.1.zip

Take care :)

Created: Tuesday, January 26 2010 19:26.05 CST

Modified: Tuesday, January 26 2010 19:26.51 CST

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The tale of Syndicate Wars Port

Author:

GynvaelColdwind

# Views: 5329

As promised, It's time to reveal the technical story behind the Syndicate Wars Port. The story is divided into two parts - the first, and the second attempt to port this game. Comments are welcomed!

Read more... (be warned that the story is long :)

Created: Monday, January 25 2010 17:20.35 CST

Modified: Monday, January 25 2010 17:28.55 CST

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Syndicate Wars - a reverse-engineering tale

Author:

GynvaelColdwind

# Views: 10147

Syndicate Wars is a game published in 1996, created by Bullfrog. The game was written in C (Watcom) for the DOS4GW DOS extender. And of course it has stopped working natively (i.e. without emulators like DOSBox) when the modern operating systems, like GNU/Linux or Windows NT series, emerged.

A few years ago my friend, Unavowed, told me about proposition of a project to create a port of Sydicate Word for modern OS'es like the two previous one I've mentioned. The port was to be done by decompiling the original executable file, locating all the functions from the standard C library, locating the DOS4GW and I/O (sound, keyboard, gfx, mouse, etc) dependencies, replacing them with modern native libc function call and libSDL/OpenAL libraries (sometimes using simple wrappers, other times by creating converters), and finally, recompiling it all to form native executables for the modern systems.

Yesterday, we've finished this project, and we've published executables, not only for GNU/Linux and Windows, but also for Mac OSX :)

Project site (screens, downloads, even a video):
http://swars.vexillium.org/

As for the technical side of the project, I'll describe everything in the next post - it was the biggest reverse-engineering project I've took part in, and I hope you'll too find something interesting in the details for yourselves :)

GNU/Linux:

Mac OSX 10.5:

Windows Vista:

Created: Monday, January 11 2010 16:22.07 CST

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Exception detection on Windows and HITB ezine

Author:

GynvaelColdwind

# Views: 5591

The Hack In The Box ezine, which was published in the years 2000-2005 (37 issues total) has been revived!
The newest issue contains 6 articles (including mine), which gives 44 pages of text, in PDF (link below). Imho it's worth taking a look. It's very possible your find something interesting for yourself there :)

Article list:
- p. 03 - Exception Detection on Windows (by me)
- p. 07 - The Art of DLL Injection (by Christian Wojner, CERT.at)
- p. 09 - LDAP Injection. Attack and Defense Techniques (cover story, by Esteban Guillardoy, Facundo de Guzman, Hernan Abbamonte)
- p. 18 - Xprobe2-NG. Low Volume Remote Network Information Gathering Tool (by Fedor V. Yarochkin. Ofir Arkin (Insightix), Meder Kydyraliev (Google), Shih-Yao Dai, Yennun Huang (Vee Telecom) and Sy-Yen Kyo)
- p. 25 - Malware Obfuscation. Tricks and Traps (by Wayne Huang, Armorize Technologies)
- p. 39 - Reconstructing Dalvik Applications Using UNDX (by Marc Sch�nefeld)

Download: HITB-Ezine-Issue-001.pdf

Comments about my article are mostly welcomed :)

Created: Tuesday, January 5 2010 13:33.31 CST

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DR6 may or may not be useful for bochs/VirtualPC detection

Author:

GynvaelColdwind

# Views: 4729

This post will be similar to the previous one, and will be about small, but interesting, details of x86 architecture, that might be (and sometimes are) easily overlooked by creators of emulators and virtual machines. The hero of today's post is the DR6 debug register, or, to be more precise, the four least significant bits of this register - B0 to B3 (breakpoint condition detected flags). Please read the whole post before jumping into any conclusions :)

Read the full post...

Archived Entries for GynvaelColdwind

Subject	# Views	Created On
BSWAP + 66h prefix (bochs, QEMU detection)	5628	Tuesday, December 29 2009
A thought about drivers\etc\hosts file	2405	Friday, August 7 2009
Another file visualizations	3001	Wednesday, May 27 2009
CONFidence conference ESET crackme solution	4316	Tuesday, May 26 2009
Ent 0.0.3 and a post about entropy in RCE	2833	Sunday, March 8 2009
ExcpHook 0.0.5-rc2 released	3011	Tuesday, February 3 2009
Difference between exports in DLLs - Vista SP 1 vs Windows 7 Beta	2731	Tuesday, January 20 2009
LOOP vs. default Mac OS X assembler	2745	Sunday, December 7 2008
Freedom for everything - total annihilation of process memory	2839	Thursday, November 27 2008
Google Chrome Sandbox	3265	Thursday, September 4 2008
ExcpHook 0.0.4 released	12505	Tuesday, January 22 2008
Exception monitor	5368	Sunday, January 13 2008
Windows Vista environment variables	5217	Friday, August 3 2007
Looking for a job...	3645	Tuesday, December 12 2006
Hello World!	3273	Thursday, September 7 2006

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