![]() That was essentially our starting point, from which all other analysis stemmed. If he shared his Ghidra project, we didn’t see it, but in his writeup we could see one important function labeled and with a full address! What he called z_add_new_note_and_check at 0x10002df0, we called check_challenge, but it does the same thing either way. Shoutout (again) to the reteps writeup, which was a great starting point. Luckily, we didn’t have to start from scratch. The first step was to pull the firmware and throw it into Ghidra. This is not too complicated, but it requires us to put on our Reverse Engineer hats and dig deeper into the firmware. The goal of this section is to use OFRAK to patch the badge firmware into “Player Piano” mode: When you start Challenge 1, the badge autoplays Peer Gynt for you and you win. Jumping right to the win condition is fun and all, but isn’t half the fun of the badge that it makes sounds? What if we could just have it… make sounds? Sounds that happen to make us win? This write-up is long, so feel free to skip ahead to the parts that interest you: we owe you a beer! (Or a ginger ale, since it seems like you may not be old enough to drink just yet.) We are unabashedly building off of this great write-up. This post walks through using OFRAK to modify the DEF CON 30 Badge firmware in fun and exciting ways. Since OFRAK is a binary reverse engineering and modification platform, it naturally became our tool of choice for badge firmware modification. Many of our demos were based on OFRAK, which we released publicly at DEF CON 30. Several of us from Red Balloon Security attended and manned booths in the Aerospace Village and Car Hacking Village. As usual, the badge also had an associated reverse engineering challenge. Everything on the badge was driven by a Raspberry Pi Pico. It included a playable synthesizer with a few instrument presets, as well as buttons, a screen, and a small speaker. ĭEF CON 30 just ended, and the badge this year was awesome. London time on the day of such Swing Line Advance.The code referenced in this writeup can be found here. (London time) on the Quotation Day for the offering of deposits in Singapore Dollars for a period comparable to the applicable Interest Period, and (b) any Swing Line Advance in Singapore Dollars, the rate reasonably determined by the Administrative Agent as the rate quoted to leading banks in the London interbank market as of 11:00 A.M. ![]() ( London time) on the applicable Quotation Day or (ii) if SOR is not available for the applicable Interest Period but is available for other Interest Periods with respect to any such Singapore Dollar Revolving Credit Advance in Singapore Dollars, then the rate shall be the Interpolated Screen Rate or (iii) if no such rate is available, the rate reasonably determined by the Administrative Agent as the rate quoted to leading banks in the London interbank market as of 11:00 A.M. ![]() ![]() SOR means in relation to (a) any Singapore Dollar Revolving Credit Advance in Singapore Dollars, (i) the rate appearing under the caption “SGD SOR Rates” on the page ABSFIX01 of the Reuters Monitor Money Rates Services at 11:00 A.M. In the event of a technical issue with the SOR, systems or market connections FNZ Securities will, using reasonable discretion, route orders to the remaining available order books. The consultant validated the information collected from the Tier 1 Suppliers, including tracking information on SORs and flagging risks based on Supplier SOR sourcing practices. If the SOR was not certified by an internationally-recognized scheme, the SOR was contacted by the third-party consultant in an attempt to gain more information about its sourcing practices, including countries of origin and transfer, and whether there were any internal due diligence procedures in place or other processes the SORs take to track the chain-of-custody on the source of its mineral ores.įor wholesale clients FNZ Securities will accept an instruction not to use the SOR for an order.5.5 FNZ Securities may, without notice, cease to send orders to a particular order book temporarily or indefinitely if an order book becomes unavailable. 10 (Running of electronic tracking pig from Loc HNE to STF) -Launching and running of electronic tracker pig from HNE to STF. ![]() DETAIL DESCRIPTION OF SOR ITEMS:C.1 Item No. ![]()
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