user96777: Someone on social media is offering me to mine bitcoin and they take 10% of any profit I make. I started talking and long story short I was told to download blockchain wallet app. 
They provided me the login credentials and I was told once I login to change my password etc. Does this sound like a scam or legit? I mean about them giving me a user id for a blockchain wallet app and I gotta buy bitcoins, transfer them to this wallet and they will mine bitcoins.
Variant:
The attacker requests that the user creates a new blockchain wallet and then shares the login credentials instead of creating the wallet for the user.

user90837: Yes, it's definitely a scam. As the old adage goes, "if it is too good to be true, it is too good to be true". The Bitcoin wallet application that you are using is governed by a seed words and not the user ID/password for the online login. So, in your case the attacker created this wallet for you, noted down the seed words and told you to login. Now, if you change your password your account details are going to be shielded from the attacker, but your wallet details and control would still be in the attacker's control. On the other side, the attacker is closely monitoring if you have deposited any bitcoins in the wallet, and as soon as he sees it, he is going to spend it.

user208: This is almost certainly a scam.
Never ever give anyone anything else than an address (things that start with 1..., 3..., or bc1...). If they ask for anything else, this is very suspcious.
A common scam is to make you create a wallet, have them add "watching" coins to it which are never yours but show up as balance, and then tell you you need to add more coins before you can withdraw.

user13866: 
I was told once I login to change my password

It is important you understand why this is a trick intended to deceive you.
Wallets don't contain bitcoin.
Wallets contain a "private key" - it is this private key that gives you control over an amount of bitcoin.
The person who creates a wallet can copy this private key and use it to make a new wallet that has control over the bitcoin. Including control over bitcoin added by you days months or years later.
You changing the password on a wallet does not keep the private key secret and safe if someone else has previously already seen the contents of the wallet.
If it helps, think of the wallet as one of those keysafes with a user-changeable combination to unlock it. If someone has previously  copied the keys inside, changing the combination that opens the keysafe doesn't keep you safe at all.

Keysafe with resettable combination - like a bitcoin wallet. It doesn't contain money. It contains keys that maybe someone already has copies of. Changing the combination on the keysafe (wallet) doesn't make those copies of the keys disappear.

See also
Mining deceptions

I've been asked to share wallet credentials to participate in mining. Is that a scam?
Am I Being Prodded By A Bitcoin Mining Scammer?
Mining in the wallet
Blockchain Wallet
How can I get a private key for this address

Wallet deceptions

I NEED YOUR HELP URGENTLY Bitcoins


96777: <p>Someone on social media is offering me to mine bitcoin and they take 10% of any profit I make. I started talking and long story short I was told to download blockchain wallet app. </p>

<p><strong>They provided me the login credentials</strong> and I was told once I login to change my password etc. Does this sound like a scam or legit? I mean about them giving me a user id for a blockchain wallet app and I gotta buy bitcoins, transfer them to this wallet and they will mine bitcoins.</p>

<p>Variant:<br>
The attacker requests that the user creates a new blockchain wallet and then <strong>shares the login credentials</strong> instead of creating the wallet for the user.</p>
 90837: <p>Yes, it's definitely a scam. As the old adage goes, "if it is too good to be true, it is too good to be true". The Bitcoin wallet application that you are using is governed by a seed words and not the user ID/password for the online login. So, in your case the attacker created this wallet for you, noted down the seed words and told you to login. Now, if you change your password your account details are going to be shielded from the attacker, but your wallet details and control would still be in the attacker's control. On the other side, the attacker is closely monitoring if you have deposited any bitcoins in the wallet, and as soon as he sees it, he is going to spend it.</p>
 208: <p>This is almost certainly a scam.</p>

<p>Never ever give anyone anything else than an address (things that start with 1..., 3..., or bc1...). If they ask for anything else, this is very suspcious.</p>

<p>A common scam is to make you create a wallet, have them add "watching" coins to it which are never yours but show up as balance, and then tell you you need to add more coins before you can withdraw.</p>
 13866: <blockquote>
<p><strong>I was told once I login to change my password</strong></p>
</blockquote>
<p>It is important you understand why this is a trick intended to deceive you.</p>
<p>Wallets don't contain bitcoin.</p>
<p>Wallets contain a &quot;private key&quot; - it is this private key that gives you control over an amount of bitcoin.</p>
<p>The person who creates a wallet can copy this private key and use it to make a new wallet that has control over the bitcoin. Including control over bitcoin added by you days months or years later.</p>
<p>You changing the password on a wallet does not keep the private key secret and safe if someone else has previously already seen the contents of the wallet.</p>
<p>If it helps, think of the wallet as one of those keysafes with a user-changeable combination to unlock it. If someone has previously  copied the keys inside, changing the combination that opens the keysafe doesn't keep you safe at all.</p>
<p><a href="https://i.stack.imgur.com/9DfXL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9DfXL.png" alt="A keysafe" /></a><br />
Keysafe with resettable combination - like a bitcoin wallet. It doesn't contain money. It contains keys that maybe someone already has copies of. Changing the combination on the keysafe (wallet) doesn't make those copies of the keys disappear.</p>
<hr />
<p>See also</p>
<p>Mining deceptions</p>
<ul>
<li><a href="https://bitcoin.stackexchange.com/q/66934/13866">I&#39;ve been asked to share wallet credentials to participate in mining. Is that a scam?</a></li>
<li><a href="https://bitcoin.stackexchange.com/q/88069/13866">Am I Being Prodded By A Bitcoin Mining Scammer?</a></li>
<li><a href="https://bitcoin.stackexchange.com/q/79906/13866">Mining in the wallet</a></li>
<li><a href="https://bitcoin.stackexchange.com/q/79842/13866">Blockchain Wallet</a></li>
<li><a href="https://bitcoin.stackexchange.com/q/74362/13866">How can I get a private key for this address</a></li>
</ul>
<p>Wallet deceptions</p>
<ul>
<li><a href="https://bitcoin.stackexchange.com/q/75776/13866">I NEED YOUR HELP URGENTLY Bitcoins</a></li>
</ul>
