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JaicraB on Cobra USB and PS3 JFW DH Custom Firmware


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166w ago - Today Spanish PlayStation 3 developer JaicraB has released some Cobra USB details alongside what appear to be hints of an upcoming PS3 Custom Firmware dubbed JFW DH with the assistance of DemonHades and crew.

Download: Cobra 1.2 and 2.0 (PS3 3.41 v2) USB Dumps

To quote, roughly translated: PS3, Cobra TEAM

Greetings Cobra TEAM.


Of course, you could see even changed the Psgroove hash tables. Continue selling the knowledge of all sceners.

Under construction:



In addition:

  • Plugins-boot manager.
  • Apps in the background. (Example: FTP while playing)
  • Charging payloads before entering the XMB. Payload Free Cobra...

PD: Cobra Team, came to me defective switch to switch from PC - JIG - DG. You change me?




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GrandpaHomer's Avatar
#44 - GrandpaHomer - 164w ago
Let's hope this will lead to solution usable with other dongles or just CFW soon ...

PS3 News's Avatar
#43 - PS3 News - 164w ago
Today Spanish PlayStation 3 developer JaicraB has explained the Cobra USB JIG protection RTOC trick implemented for the PS3 against cloning the device.

To quote, roughly translated: Flynn sent me this text explaining this protective carrying the Cobra, I hope it will open the eyes of those interested in reversing the dumps.

EXPLAIN RTOC COBRA TRICK

The JIG Cobra has several protective measures to ensure that your code could not be used correctly even if your code could be dumped.

This trick RTOC in the registry is the first used for this purpose in addition to hinder analysis.
Registration is initially RTOC stored in the battery to keep the RTOC of lv2 and power it back later:


At this point we have to explain that the OFFSET DELTA. DELTA OFFSET is a method used in the x86 in its original moments in the creation of computer viruses, to calculate the memory address in which we are in the sea of ​​bytes in RAM.

In the original time a computer virus when I did not know where he was pulled into an executable,
depending on the executable it could be an initial site or another, for it was invented DELTA OFFSET.

DELTA OFFSET can be used in any system, the procedure is:

  • Using the record that indicates the current execution address (or the next depending on the system)
  • Reducing the size of the previous code we use the value obtained from the registry.

Knowing this, and taking for example the x86 processor where the EIP register can not be read directly invented the trick make a call to a "subfunction" which is simply the following line to the call:


X86 call instruction saves the top of the stack the address of the next instruction to itself. Thus using pop draw from the top of the stack this value, and stored in eax for example, and having the memory address where we only subtract the above would be missing and we have the exact calculation.

The PowerPC can use this trick using the BL instruction is equivalent (LINK BRANCH), which jumps to a "subfunction" but before you save LR in the record the following address to BL.


At this point we see the trick used for the creation of the RTOC of charges at this time. If you look both r0 and RTOC are passed to 0:


Subsequently, given the value 0x11DE0 to RTOC:


A r0 is given the value 0x920:


R0 is subtracted from the value of RTOC:


Unlike the PowerPC x86 LR register can be read directly with mflr instruction, we put in RTOC the value obtained by the delta offset:


To calculate the delta offset subtract final instructions executed before the delta offset, which were 4, or 16 bytes:


Finally we add the value of r0 at the end of the delta offset RTOC, storing the result in the RTOC and this already takes RTOC suitable for this hook:


It takes having the RTOC stored in the stack 3 arguments that the hook received:


You call the function of the charges where the first argument will check for command 0x8202 (a special command to the usual):


After making the necessary steps as charged, the battery recovers the original RTOC, like the arguments the hook received, it executes the original instruction that was overwritten in the syscall entry 379 (in this case) to have our hook, and call the original syscall lv2:


Upon returning to retrieve the original LR from the stack and returns to the prompt


More PlayStation 3 News...

PS3 News's Avatar
#42 - PS3 News - 164w ago
Following up on his previous work, today [Register or Login to view links] has scanned the Cobra USB 2.0 USB traffic with his [Register or Login to view links] and shared the resulting dump in total phase data center format.

Download: [Register or Login to view links] / [Register or Login to view links] (Mirror) / [Register or Login to view links]

To quote: Cobra USB dongle arrived today, thank you VERY much goes to span who donated a dongle to me! (let me know if you need it back, or I'll keep it if there is a need to scan again if there is any updates)

We upgraded the Cobra to v2.0 and booted a 3.41 phat PS3 with the Beagle 480 USB protocol analyzer attached between the Cobra and the PS3. The resulting data file is attached.

I hope the developers in the community have some use for this. Cobra usb dongle med PS1 support!!

Also, from an0nym0us on IRC today: payload_groove_cobrav2.o and some ASM:

[an0nym0us] sure the payload .bin file is there
[an0nym0us] [Register or Login to view links]
[an0nym0us] daxgr: [Register or Login to view links] here you go ...
[an0nym0us] good luck

Cobra 2.0 exit from ps2 game+boot of ps2 game at 185632.rar: [Register or Login to view links]

Shortly following, [Register or Login to view links] has released a PSGrooPIC compile of the code. To quote:

Here's my compilation for PSGrooPIC. I haven't tested it because my PS3 is on FW 3.66 (online FTW). Remember that according to Cobra you must be on 3.41 official and you mustn't remove the dongle.

[Register or Login to view links]

P.S: It may not work! Cheers!





More PlayStation 3 News...

PS3 News's Avatar
#41 - PS3 News - 166w ago
JaicraB has updated his blog again with the Cobra USB dumps: jaicrab.blogspot.com/2011/06/ps3-dump-cobra.html

Rough translation: PS3, Cobra. Dumps

That is all. Enjoy.

Cobra 1.2 [Register or Login to view links]
Cobra 2.0 [Register or Login to view links]

The nucleus is 3.41 v2 Original.

My support Graf_Chokolo. Help him. grafchokolo.com/grafchokolo-fight-sony.html

daveshooter's Avatar
#40 - daveshooter - 166w ago
I Thanks you both.

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