OpenRCE

📚 OpenRCE is preserved as a read-only archive. Launched at RECon Montreal in 2005. Registration and posting are disabled.

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!

Created: Thursday, January 10 2008 11:58.42 CST

Modified: Thursday, January 10 2008 12:11.10 CST

Printer Friendly ...

note to self

Author: dennis

# Views: 5163

when patching drivers such as tcpip.sys by hand, do not forget to update the image checksum before rebooting ;-)

Blog Comments

jms	Posted: Thursday, January 10 2008 14:45.51 CST
Hahahah that's great!

fileoffset	Posted: Thursday, January 10 2008 20:31.22 CST
dolt :)

jms	Posted: Friday, January 11 2008 02:46.16 CST
Hey wait a minute, you're weren't patching a new Vista tcpip.sys were you by chance?

dennis

Posted: Friday, January 11 2008 02:52.55 CST

hey jms,

nope I don't have Vista at all but while you're making assumptions: I've had a quick look at quite some drivers yesterday, both MS ones and 3rd party ones. And some of them indeed contain similar code: malloc()-alike calls in conjunction with movzx r32, r16 instructions as size parameter. It's not that I have found anything "interesting" at a first glance yet, but you might want to have a look ;-)

jms	Posted: Friday, January 11 2008 02:56.55 CST
Righteous stuff...did you take them for a spin with the ioctl fuzzer I wrote?

dennis	Posted: Friday, January 11 2008 03:00.01 CST
nope. but that'd be a good idea. I might set up a new VM and do some testing this weekend if I'm in the mood. Maybe we can work together if you're interested.

c1de0x	Posted: Sunday, January 13 2008 00:55.22 CST
lol @ dennis. Good one!

jms	Posted: Sunday, January 13 2008 00:58.00 CST
I am interested but very short on time as of late, however feel free to post questions here or fire me an email. Also I wrote a static analysis plugin for ImmunityDebugger to weed out the IOCTL codes that the user-mode trap could have missed. Check the SVN repo on http://ioctlizer.googlecode.com

There are 31,328 total registered users.

Recently Created Topics
[help] Unpacking VMP...	Mar/12
Reverse Engineering ...	Jul/06
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
Question about memor...	Dec/12

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