1
"Generate Pseudorandom Numbers"
Auto Assembler Script
{ Author: ParkourPenguin
Date: 27 / 03 / 2016
This script generates a pseudorandom number between [lowerBound] and
[upperBound] (inclusive) every [interval] ms. Stored in myRandomNumber.
Please note that msvcrt.rand is only guaranteed to return a number from 0
to 32767.
}
[ENABLE]
alloc(newmem,2048)
label(asTimeGoesBy)
label(lowerBound)
label(upperBound)
label(interval)
label(myRandomNumber)
label(shouldExit)
registersymbol(lowerBound)
registersymbol(upperBound)
registersymbol(interval)
registersymbol(myRandomNumber)
registersymbol(shouldExit)
createthread(newmem)
newmem:
call kernel32.GetTickCount
push eax
call msvcrt.srand
add esp,4
asTimeGoesBy:
call msvcrt.rand
xor edx,edx
mov ebx,[lowerBound]
mov ecx,[upperBound]
cmp ecx,ebx
cmovl ecx,ebx
inc ecx
sub ecx,ebx
idiv ecx
add edx,ebx
mov [myRandomNumber],edx
push [interval]
call kernel32.Sleep
cmp [shouldExit],0
je asTimeGoesBy
// free memory, return
pop eax
push 8000
push 0
push newmem
push eax
jmp kernel32.VirtualFree
db CC CC CC CC CC CC
lowerBound:
dd #10
upperBound:
dd #20
interval:
dd #1000
myRandomNumber:
dd 0
shouldExit:
dd 0
[DISABLE]
shouldExit:
dd 1
unregistersymbol(lowerBound)
unregistersymbol(upperBound)
unregistersymbol(interval)
unregistersymbol(myRandomNumber)
unregistersymbol(shouldExit)
2
"Lower Bound"
1
4 Bytes
lowerBound
3
"Upper Bound"
1
4 Bytes
upperBound
4
"Update Interval"
4 Bytes
interval
5
"Pseudorandom Number"
1
4 Bytes
myRandomNumber