[dundee] EthHack: GCHQ challenges codebreakers via social networks

[Robert Ladyman]

> I'm actually madbro. Turns out the binary is built for an imaginary
> architecture built by them. Missed a hint, there's some stego in the
> original image. I found the last page through a complete fluke. Its
> "/soyoudidit.asp". Not happy until I've run this through their
> "architecture" though.
> 
> On Dec 1, 2011 2:34 PM, "Robert Ladyman" <it at file-away.co.uk> wrote:
> > The 00 01 00 00 and the nops give it away quite quickly, don't they.
> >
> > > Got as far as the raw binary for a 16 bit DOS executable. Running it
> > > produces no output, the ASM seems to null registers using an XOR and
> > > then do some comparisons against various states. There's also some
> > > iteration against the stack pointer, which seems to move the stack
> > > frame by 65036 every iteration. Strange, but I'm getting somewhere.
> > >
> > > On Dec 1, 2011 11:23 AM, "Robert Ladyman" <it at file-away.co.uk> wrote:
> > > > > http://www.bbc.co.uk/news/technology-15968878
> > > >
> > > > ...and if anyone needs a clue, they can ask me.
> >
> > --
> > Robert Ladyman
> > File-Away Limited
> > 3 Ralston Business Centre, Newtyle, Blairgowrie
> > Perthshire  PH12 8TL SCOTLAND
> > Tel: +44 (0) 1828 898 158
> > Mobile: +44 (0) 7732 771 649
> > http://www.file-away.co.uk
> >
> > ============================================
> > Registered Office: 32 Church Street, Newtyle, Blairgowrie
> > Perthshire, PH12 8TZ SCOTLAND
> > Registered in Scotland, Company Number SC222086
> >
> >
> > _______________________________________________
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> > Chat on IRC, #tlug on irc.lug.org.uk
> 

-- 

Robert Ladyman
File-Away Limited, 32 Church Street, Newtyle
Perthshire, PH12 8TZ SCOTLAND
Registered in Scotland, Company Number SC222086
Tel: +44 (0) 1828 898 158
Mobile: +44 (0) 7732 771 649
http://www.file-away.co.uk
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