Cryptocurrency — OSINT challenge (with solutions) PT3

OSINTtrainee

Published in

OSINT TEAM

4 min readSep 16, 2023

In this write up, I will be using another real world scenario to solve cryptocurrency-based OSINT challenges.

You are more than welcome to solve these, don’t worry if you are stuck I will help along the way.

The plan

You just received a contract address from a client and they asked you to check it. Figure out the answers for the following questions:

The contract address: 0xB706Bc51630c550Fc637aacbC95D600b06FF4C97

- Beginner -

1. Find the owner of the contract address

2. From which exchange did the contract address owner received funding from?

3. How many Ethereum have been collected during the sale?(use even numbers)

4. How many addresses received Ethereum from the contract?

5. How much is the total supply of the asset associated with the contract address?

- Intermediate -

6. How much Ethereum and $ was the mint price for the following assets? Token ID #137 & #5263?

Solutions

1. Find the owner of the contract address

Paste the address into the search bar on Etherscan to see what you are working with and click on “Contract Creator”.

1. Solution: 0x330e8FF8672c5C0dd168e2326Ad6ad619e76897F

2. From which exchange did the contract address owner received funding from?

Click on the “74” which is the total number of transactions to see all the pages and go to the last txn.

Note: If you wish, you can scroll down and click on “View all transactions”

Go to the second page to see who funded the address. The answer for the 2nd question is Kucoin.

2. Solution: Kucoin

Note: First transaction sent to this address

3. How many Ethereum have been collected during the sale?(use even numbers)

Stay on the same page, you can see “somehow” the owner received 205 Eth which seems like it’s just appeared out of nowhere, right?

There are no incoming transactions apart from the 1.994 Eth. So what happened?

Go back to the main page of the contract address and click on “Internal Transactions”.

This will show you the addresses that received Ether from the deployer. These transactions might look like they are duplicated, but no. 8 outgoing transactions to 2 different addresses. To quickly check how much Ethereum have been sent out, use Blockchair.

It shows total 1,020 Ethereum was transferred out and the $ value at the time of the transfer(s) is $2,9million.

3. Solution: 1,020 Ethereum

4. How many addresses received Ethereum from the contract?

4. Solution: 2 addresses only

5. How much is the total supply of the asset associated with the contract address?

Paste the contract address into the search bar and click on “Token Tracker”.

This will open up the page of the token where you can see additional information like total supply, current holder count and total transfers.

Note: Useful information can be found here

5. Solution: 6,799 total supply

6. How much Ethereum and $ was the mint price for the following assets: #137 & #5263?

To be able to search for token IDs, you can use Opensea or just stay on the page where we left off and click on the magnifying glass, type in the token ID.

This page will show you the basic information about the particular token itself and the transfer count, transactions. To be able to find out how much this individual paid for token #137, we need to find a method called “Raffle Mint”. This can vary between different tokens, but “Mint” will always be there.

Click on the first transaction hash to see the contents of the transfer.

What you see here is the buyer minted 3 tokens for 0,45 Ethereum in total. The current value is shown, but we need to figure out the value on the date of the transfer. Simply just click on the gray box to see the value on the day the transaction was sent.