When I reverse I should confess that I do not like much the
"dead listing" way.
Recently, I recognised a little of myself inside As65pp’s essay.
He wrote :
> I’m not that excited about staring at huge code-listings
> for hours on end
Yeah, that’s me !
> To be honest, I wasn’t any good at maths in school either 🙁
Err… I think I wasn’t too…
> Nevertheless I was able to crack some programs by using a bit
> of common-sense and imagination
So do I (And a big part of the cracking scene too, I suppose).
Sure we must always learn (it was a thing +ORC was right).
But the simpler world of yesterday was a little easier for our
poor brains: my old 8bits computers weren’t too much difficult to
program in assembler, and a 64ko disassembled file was just right to
Today it’s just a little too hard to have knowledge of thousands
of API, to switch continuously from W95 to WNT4, sometimes from
Dos to Unix…
I will try to imagine the blackboard on Fravia+’s site in just
"Hi, I know a little Kernel, but I lack knowledge about the
GDI. A friend of mine could help: he knows the USER pretty well.
Perhaps someone else could help, we have been cracking for 20 years,
but we need advices about the last LineTo() API, which is a little
too complex for us. We are reverse-engineering the new Notepad.exe
for SuperWindowsJaved 2003, (Notepad_SWJ_2003.exe, 30.000.000.000
Well, I remember the title of a lesson which +ORC never released.
It was : "Intuition & Luck".
These are the two things I use.
NORTON SPEED DISK TRIAL 30 Days 1.0 for Windoze NT4
by SYMANTEC, *** http://www.symantec.com ***
Tools you need :
SoftIce 3.2 or 3.01 for NT4 (everywhere)
WDasm89 (regged) or 8.5 or 8.7 (cracked)
I was gently installing my NT4 service pack 3, when I thought:
Hey, it’s just two months I’m using this OS, I know it’s watching
his file system itself, yet I would like to clean my hard drive.
Hmm… Well, Start Button, Accessories, system tools and… what?
No ScanDisk? No Defrag?
Well, a click on the HD properties, tools, and look:
"No defragmentation tool is currently installed"
(And you can search, but there’s none coming with NT)
Hey, that’s nevertheless a good thing : a society different than
Micro$oft can offer a tool for this system.
OK, I Heard that this good Pete made his utilities for NT, too.
(And it was a good idea, because of the As65pp1 essay on the other NT
disk defragmenter, DiskKeeper).
And obviously, none of my friends has a copy of these Utilities, all
of them stupidly using only Windoze95
(I must confess I’m a stupid guy too, using this OS to play games, a
little too much… Yet only good games).
Well, fired Netscape, visit Symantec, got the speed disk trial file.
Installed it. Well, works nice. I was in a hurry to see his
protection instead of using it… guess this happens to all Fravia…
Well, let’s go to work… less funny, but useful:
Install Speed Disk trial. You must reboot, so reboot. Hope you’ve got
a speed machine. I do not. I can assure you that debugging with NT4 is
boring, coz you reboot often; and always the same soap: "please wait
while OS write info to disk" and rebooting: "OS loader…" seems
to last ages and ages… Sure Micro$oft got a deal with many cigarettes
and cafeine vendors in regard of the time you spend waiting along…
Play a little with sd32 (speeddisk), see how it works, etc, etc.
Note a nagscreen before the application.
Profite to optimize your HD if you have never made it, since you loaded
OK, let’s pass to serious reversing: clock a month later. Fire Speed Disk.
Oh, no! a silly nag : "This product trial period has expired…"
No more defragmenting…
This could have been very sad, but you know the right Web Sites, like
the one where you are reading this, and where you learn to laugh about
sad nagscreen protection schemes.
Like usual, we clock back to the right month.
Oh, no! a second nag : "Cannot locate a valid evaluation section in
We must know who’s owner of the nag. Is it the executable, SD32 ?
Or is it one of the DLL installed with it ?
Fire SoftIce. CTRL+D.
TASK. This give "No LDT". Hey, what’s that ?
HWND. This give "Unable to find a desktop window".
Hmm… What’s up with Winnie ? When I use it with Windoze95, I…
I ran to read the SoftIce manual. If you haven’t understand run too!
Everything is normal.
We are not in the habitual W95, then type: PROC
And you remark, between all the procs running on your system: SD32
Interesting. This should say that this nag belong to SD32.EXE.
This is true.
But this is a little false as well: if you search the executable
SD32.EXE for words of nag-strings we have seen, like "trial period
has expired" or "valid evaluation section", you won’t find them…
You’ll find them in a very interesting file, if you search for these
last words inside your whole HD (or if you have sniffed the
installation of Speed Disk Trial), IRATRIAL.DLL, located in your hard
disk at c:Program FilesSymantec.
Let’s examine this curious DLL.
Hmm, this name recalls all by itself its purpose! (Names ARE important
indeed): ira "TRIAL" !
Let’s disassemble it with W32Dasm.
Your eyes should twinkle in front of the following imported function :
Double-click on it. Yeah, just one reference in this file.
With this, you must smell that the protection dwells here…
But wait. One thing made me doubt.
Looking the exports of SD32.EXE, I didn’t see any import
This is a point I like someone to explain me.
How does the executable SD32.EXE know it calls the library
IRATRIAL.DLL (coz in fact, it use it ; see below).
If you like tracing with Winnie, like me, you’ll notice that you land
inside the code of IRATRIAL.DLL from the code of SD32.EXE, here :
* Reference To: ole32.CoInitialize, Ord:0025h
:0040D483 FF15ACE14100 Call dword ptr [0041E1AC]
:0040D489 8D45FC lea eax, dword ptr [ebp-04]
:0040D48C 50 push eax
:0040D48D 68606C4100 push 00416C60
:0040D492 56 push esi
:0040D493 57 push edi
:0040D494 68706C4100 push 00416C70
* Reference To: ole32.CoCreateInstance, Ord:000Bh
:0040D499 FF15B0E14100 Call dword ptr [0041E1B0] ;You land
:0040D49F 85C0 test eax, eax
:0040D4A1 7C3A jl 0040D4DD
:0040D4A3 57 push edi
:0040D4A4 8B45FC mov eax, dword ptr [ebp-04]
:0040D4A7 56 push esi
* Possible StringData Ref from Data Obj ->"Norton Speed Disk Trial"
:0040D4A8 6874B84100 push 0041B874
* Possible StringData Ref from Data Obj ->"Symantec"
:0040D4AD 6868B84100 push 0041B868
:0040D4B2 8B00 mov eax, dword ptr [eax]
:0040D4B4 FF75FC push [ebp-04]
:0040D4B7 FF500C call [eax+0C] ;You land in
:0040D4BA 85C0 test eax, eax
:0040D4BC 7C14 jl 0040D4D2
:0040D4BE 57 push edi
:0040D4BF 8B45FC mov eax, dword ptr [ebp-04]
:0040D4C2 57 push edi
:0040D4C3 57 push edi
:0040D4C4 8B00 mov eax, dword ptr [eax]
:0040D4C6 FF75FC push [ebp-04]
:0040D4C9 FF5014 call [eax+14] ;You land in
And a lot of others connections…
Remark that from the first call I noted above, Callole32.CoCreateInstance,
you land in ole32 before landing in IRATRIAL.DLL.
I can’t explain The smart TRICK THAT this DLL uses to go into
Try stepping over this Call (ole32.CoCreateInstance) with Winnie.
You’ll see, in the code window the following report:
NTICE: Load32 START=1180000 SIZE=9000 KPEB=80644020 MOD=IRATRIAL
LDR: Automatic DLL relocation in sd32.exe
LDR: Dll IRATRIAL.DLL base 10000000 relocated due to collision with
D:ProgramFilesNortonSpeed Disk TrialMFCEXT.DLL
Uh? What’s that? a collision with the Micro$oft MFC library? Are there
any wounded codesnippets around?
Where is this curious process allowing the SD32.EXE file calling this
I think I lack something…
But I was sure (you know, luck & intuition!) that all came from
this DLL, coz of his name. They could also have called it
IRA30DAYSTRIALPROTECTIONLOOKHERE.DLL, this would have been the same
Then, look with W32Dasm the imports of this curious library.
Hey! You should jump seeing : MSVCRT.time !
And another one: MSVCRT.locatime.
And, if you are as much silly as me, you fire Winnie, make a :
BPX MSVCRT!TIME (Assuring you’ve loaded all the exports in winice.dat)
and you trace.
And you trace.
And you trace. And you trace again. Again.
Well, I can assure you’ll trace for a long time… and you will
eventually find, but this will happen ages later… Because the
comparison is far, far away…
That’s not zen at all.
And I was not mad (not yet again).
Then, I’ve stop tracing, took a sit and started thinking.
Mmm… I was first thinking about these type of time-crippled software
Often, this kind of reversing is very easy. The comparison between
installation date and current date is usually not very far away.
But sometimes… Well, just one trial time soft I couldn’t crack :
this was (and still is) CorelDraw7 30 days Trial. I’ve never seen
a crack for this one (a good crack). A great protection, apparently.
Someone taking this gauntlet? What are all the +HCUkers doing?
I was hoping this one wasn’t a hard type, like Corel, when I
remembered I did not have a look at the Registry Base.
It was coz I haven’t TechFacts for NT4. This program is indeed a
Indeed! just try the orphan dll function on your own hard disk (curiously called "search for dll") and you’ll see wich TREASURES are inside techfakt 🙂
and I lack it with WindozeNT.
I installed again Speed Disk, after a good cleanup of HD and registry,
I started it again – It works fine – and
I looked the modification in my HD and inside my registry myself,
comparing my old registry (always backup your registry before
installing and reversing!).
I compared them too before and after the launch of Speed Disk.
Then I did the same before and after clocking away and back a month.
And I sniffed an interesting fact:
My registry was altered this way, in the registry :
[HKEY_CURRENT_USERSoftwareSymantecNorton Speed Disk Trial1.0]
this key: "Evaluation"
contained following bytes :
Well, examining what’s happening before and after launching Speed
Disk, two bytes were each time changed :
the first one , here "ED", and the 27th one, here "74",
were changed with other values.
Then, I tried to change myself these bytes to some fake value,
such as "FF" for the first one and "00" for the other one, and
then fired Speed Disk once more.
Immediately, the nag "Cannot locate a valid evaluation section in
your registry…" nagging us like when we clocked back, remember?
All right. All was sure, now. Each time SpeedDisk was fired, these
two values were changed, and they regard the time.
Time was out, bad value were in the key of the registry.
Another look in the IRATRIAL.DLL and I point a finger, slowly on the
following imported function : ADVAPI32.RegQueryValueExa
There’s only one place in the code where this DLL uses it.
The DLL should know the registry key in order to place the string
"Cannot locate a valid evaluation" which it contains and obviously
uses ADVAPI32.RegQueryValueExa as API.
If you BPX MSVCRT!REGQUERYVALUEEXA you will break much too much before
the good snippet.
No, we need a "vectoring breakpoint", i.e. a breakpoint that brings us
in a part of the code where we’ll be able to use the "correct" breakpoint
(in this case MSVCRT!REGQUERYVALUEEXA) without interferences.
Therefore we’ll use now as vectoring breakpoint BPX MSVCRT!TIME, for the
reasons that we have seen above.
Hit F12 to return from MSVCRT, and you will land in IRATRIAL.DLL
then, disable this vectoring breakpoint, and use now
And you will land in the good portion of code:
* Reference To: ADVAPI32.RegQueryValueExA, Ord:0136h
:02C50 FF15A4610010 Call dword ptr [100061A4] ;HERE
:02C56 8945F8 mov dword ptr [ebp-08], eax
:02C59 8B45F8 mov eax, dword ptr [ebp-08]
:02C5C E900000000 jmp 2C61 ; curious jmp
* Referenced by a Jump at Addresses:02C35(U), :02C5C(U)
:02C61 5F pop edi
:02C62 5E pop esi
:02C63 5B pop ebx
:02C64 C9 leave
:02C65 C20C00 ret 000C
Remark this "curious jmp", at offset 10002C5C : this jumps to the
offset just following, 2C61. The DLL is full of such boring
short-jumps. Works like an anti-debugging "nagging" for two reasons:
– It’s unpleasant when you trace : you think always, seeing a jmp:
"My, where the hell in the code we’ll we land now ?" And you go
right after it interrupting your thoughts…
– It’s really boring when you read the dead listing, coz you look at
all the locations and you think always this is a important reference
to look for and in fact it’s just a silly do-nothing jmp !
Well, you make the ADVAPI32.RegQueryValueExA call, storing your
"evaluation" key in memory (keep an eye on it), and from the
10002C65 location, we far RET 000C and land here :
:016F6 E81F150000 call 10002C1A ; call ADVAPI32.RegQueryValueExA
:016FB 85C0 test eax, eax ; is there a key ?
:016FD 0F850A020000 jne 1000190D ; yes, no jmp
:01703 C745D400000000 mov [ebp-2C], 00000000
:0170A 8B4D08 mov ecx, dword ptr [ebp+08]
:0170D 83C109 add ecx, 00000009
:01710 E863180000 call 10002F78 ; make checksum with
; the time and key
:01715 50 push eax
:01716 8B4D08 mov ecx, dword ptr [ebp+08]
:01719 83C109 add ecx, 00000009
:0171C E8141A0000 call 10003135 ; make checksum with
; the time and key
:01721 50 push eax
:01722 6A26 push 00000026
:01724 8B4508 mov eax, dword ptr [ebp+08]
:01727 83C031 add eax, 00000031
:0172A 50 push eax
:0172B 8B4D08 mov ecx, dword ptr [ebp+08]
:0172E E891030000 call 10001AC4 ; make checksum with
; the time and key
:01733 8B4D08 mov ecx, dword ptr [ebp+08]
:01736 83C131 add ecx, 00000031
:01739 E86F020000 call 100019AD
:0173E 85C0 test eax, eax
:01740 0F844A000000 je 10001790 ; no jmp and no interest
:01746 6890400010 push 10004090
:0174B 8B4508 mov eax, dword ptr [ebp+08]
:0174E 83C033 add eax, 00000033
:01751 50 push eax
:01752 E8F1010000 call 10001948 ; make checksum with
; the time and key
:01757 83C408 add esp, 00000008
:0175A 85C0 test eax, eax
:0175C 0F842E000000 je 10001790 ; no jmp and no
:01762 8B4D08 mov ecx, dword ptr [ebp+08]
:01765 83C157 add ecx, 00000057
:01768 E8BCFEFFFF call 10001629 ; make checksum with
; the time and key
:0176D 8B4D08 mov ecx, dword ptr [ebp+08]
:01770 3B4143 cmp eax, dword ptr [ecx+43]
:01773 0F8217000000 jb 10001790 ; NO! else "Cannot locate…"
:01779 8B4D08 mov ecx, dword ptr [ebp+08]
:0177C 83C157 add ecx, 00000057
:0177F E8A5FEFFFF call 10001629
:01784 8B4D08 mov ecx, dword ptr [ebp+08]
:01787 3B4147 cmp eax, dword ptr [ecx+47]
:0178A 0F8336000000 jnb 100017C6 ; JUMP! else "Cannot locate…"
* Referenced by a Jump at Addresses:01740(C), :0175C(C), :01773(C)
:01790 837D1000 cmp dword ptr [ebp+10], 00000000
:01794 0F8520000000 jne 100017BA
:0179A 6A00 push 00000000
:0179C 6A30 push 00000030
:0179E FF750C push [ebp+0C]
* String Resource ID=00102: "Cannot locate a valid Evaluation
section in your registry" |
:017A1 6A66 push 00000066
I pass the checksum manipulating, we’re not here to make
a time-key-generator… we are here to reverse and understand some
alien code… so we don’t care at all about the call to "make checksum
with the time and key" I noted, nor about the tests "no jmp and no
interest" too, which verify if in fact, there is or not a key (then don’t
erase yours in the registry!)
The jb 10001790 is much more interesting, and happens when you clock
back: you land in the nag "Cannot locate a valid Evaluation".
So we patch it with three
"inc eax; dec eax" (6 bytes)
40 48 40 48 40 48
Look at the jnb 100017C6: if there’s no jmp here, you land too in
the nag "Cannot locate a valid Evaluation".
We patch it, obviously, with "jmp 100017C6" : EB 3A
Only two bytes instead of six, just patch the following 4 to
40 48 40 48 even if we’ll never land there (one never knows how the
many Intel processors may interpret code ahead 🙂
Then, let’s go to this 100017C6 location we must jump :
* Referenced by a Jump at Address:0178A(C)
:017C6 8B4D08 mov ecx, dword ptr [ebp+08]
:017C9 83C157 add ecx, 00000057
:017CC E858FEFFFF call 1629
:017D1 8B4D08 mov ecx, dword ptr [ebp+08]
:017D4 3B414F cmp eax, dword ptr [ecx+4F]
:017D7 0F871D000000 ja 17FA ; NO! else "This
; product’s trial…"
:017DD 8B4D08 mov ecx, dword ptr [ebp+08]
:017E0 83C157 add ecx, 00000057
:017E3 E841FEFFFF call 1629
:017E8 8B4D08 mov ecx, dword ptr [ebp+08]
:017EB 2B4143 sub eax, dword ptr [ecx+43]
:017EE 8B4D08 mov ecx, dword ptr [ebp+08]
:017F1 3B414B cmp eax, dword ptr [ecx+4B]
:017F4 0F8631000000 jbe 182B ; JMP! else "This
; product’s trial…"
* Referenced by a Jump at Address:017D7(C)
:017FA 837D1000 cmp dword ptr [ebp+10], 00000000
:017FE 0F8520000000 jne 1824 ; we don’t care
:01804 6A00 push 00000000
:01806 6A30 push 00000030
:01808 FF750C push [ebp+0C]
* String Resource ID=00103: "This product’s trial period has
expired. Please contact your"
:0180B 6A67 push 00000067
You see we must avoid that ja 100017FA, which lands in the
preparation of the "Trial expiration" string. Well, the same
as above, replace with three "inc eax; dec eax" (nopping 6 bytes)
We’ll never land in the :017FE location, so we don’t care
about this jump.
Why? Coz we gonna patch the first verification, jbe 182B.
We must jump, avoiding the following (frightening) location:
Then we patch with :
jmp 1000182B (EB 35)
Now you fire your Speed Disk.
Yep! It works! You gonna defragment your NT4 for ages and ages
till the cows come home!
Even your little-little kids will use it in twenty years!
The patch :
Offset : B73
Find : 0F8217000000
Replace with : 404840484048
Offset : B8A
Find : 0F8336000000
Replace with : EB3A40484048
Offset : BD7
Find : 0F871D000000
Replace with : 404840484048
Offset : BF4
Find : 0F8631000000
Replace with : EB3540484840
(C)1997 –FootSteps (We create cracks!)
End of FootSteps’ ESSAY
About the checksum with Windoze NT4:
To all of you working in the WinIce NT essay part, the sympathic
"project2" company: BOZO, Birdy Harry and ViceVersa+ :
I don’t work on the checksum of this IRATRIAL.DLL coz I know
much too few of WindozeNT.
Is the checksum verification of this OS activated somewhere?
Is this only with a NTFS partition?
Is this verificated with drivers only?
Then, why not with the EXE and the DLL?
Thanx for an answer.
FootSteps’ REQUESTS (more)
I’d like to thank everybody on this site about teaching me the little
knowledge I got by now.
Few years ago, I was still looking everywhere in the newsgroups for a
new crack I needed, you know, one of those "me too" guys.
And now, most of the time, It takes me just a few hours of interesting
amazing work to reverse my software. And to give too: I’ve now got some
requests by friends of mine!
The world is reverse-engeenering itself, isnt’it? 🙂
I don’t totally agree with the whole "ideology" of +ORC, but I must
admit: His tutorial was good indeed, and it was not boring to read at
One maxim was really true : "Give a man a crack… Teach him…"!!!
Thanx +ORC! I will never be hungry again 🙂
Razzia, you impressed me with your "function disabled" essay.
This is much more than simple cracking; thanks to have given me to
follow you on this way and learn from you.
This remember me about a fact that happened last week.
I was looking the "big" computer of a friend of mine, who plays
some (marvellous) 3DFX games.
Then he showed me a SNES emulator.
I saw him playing a copy of Donkey Kong with it.
I didn’t believe my eyes :
I forgot immediately about the pretty 3dfx game in itself, and
thought about this guy who reversed the SUPER FAMICOM alone, and
made this emulator!
Well done, man.
We got still a very long way in reversing and learning…
About cracking 3DFX games, I got a little problem.
I can only use the dead listing method.
Because when you start a 3DFX game, the video is switched to
the 3DFX board, and Softice breakpoints inside a blackscreen
where you cannot see anything at all… Someone’s got a idea?
Can someone explain me why Softice 3.21 works very well with
this new (and windowed) video driver under Windoze95, and it
does not work with my version of Softice 3.2 for WindozeNT4?
I got the same video switch as with the old 3.01…
Numega’s support cannot help me unfortunately 🙂
(Yet I love those guys… the BEST by far (very far) programmers
and Fravias of the whole universe. I would never have been able
to write this without you, men!)
FootSteps’ REQUESTS(even more)
Could someone explain the CoreDraw7 Trial 30 days protection…Thanx.
I will not tell you how many hours I spent on this without result…
A lot! 🙂 & :-(.
Only thing I understood is that it is protected by a DLL type of
This protection is named Sentinel.
I liked your reverse essay on Filemon, Fravia+, and the great
introduction to VxD by +Rcg. Can you teach us more about these
Cause we continuously need to make some kind of old DOS TSR, and
these new VxD that are poorly documented on the whole Web.
Thx to all of you, from the authors of the "Most stupid protection"
essays to the "Toughest" one’s.
Note that I’ve never employed the words "by the way" nor the "BTW"
abbreviation, which seems to be present mostly on most pages of
this site… Sometimes, I think that searching for "reverse
engeenering" or "by the way" on any search engine will land you
to the same site : this one! :————–)
End of FootSteps’ REQUESTS (was about time)