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Author Topic: Electrum balance drops to 0 BTC  (Read 247 times)
Uptimus_Princeps (OP)
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April 26, 2019, 01:57:45 AM
Merited by bob123 (1)
 #1

Bitcoin Client Software and Version Number: Electrum 3.3.4
Operating System: Windows 10 Enterprise (Version 1903)
System Hardware Specs: Intel Core i7-7700K CPU 4.20 Ghz, 16 GB DRAM4, 64 bit
Description of Problem: I transferred bitcoin to my wallet about 2 weeks ago and confirmed that the amounts did arrive into the account. A few days later, I signed into my account and realized that my balance was showing 0 BTC.  Huh. I have no idea where the BTC went. I checked the history and it seems to show that the amount was transferred out but I definitely don't remember doing that. How do I get my BTC back?! Any help is sincerely appreciated!
Any Related Addresses:
Any Related Transaction IDs:
Screenshot of the problem: https://ibb.co/dQrqpK1
Log F]iles from the Bitcoin Client:
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nc50lc
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April 26, 2019, 02:39:21 AM
Last edit: April 26, 2019, 03:30:43 AM by nc50lc
 #2

First, Bitcoin transactions are irreversible and there's no way you can get your money back.

Okay, the version seems fine but there are couple of clone sites that have the same looks of the original and contain the same version numbers in the download page.
Questions are:
  • Where did you downloaded the file?
  • Have you verified the signature of your Electrum?
  • Have you updated it to 3.3.4 from an older version than 3.3.3 because of an update message with a link?

But the culprit who stolen your Bitcoin did the transfer two days after your deposit, that indicates that it might be a hacking incident or leaked backups rather than a fake Electrum wallet.
Because in fake electrum cases, the hacker usually transfer the funds to his wallet within seconds.
  • Where did you store the SEED or private keys? Online or a local file?
  • Did you created the wallet yourself?

Uptimus_Princeps (OP)
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April 26, 2019, 03:54:44 AM
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Where did you downloaded the file?
electrum.org ( I triple checked to make sure everything was legit)
Have you verified the signature of your Electrum?
Yes
Have you updated it to 3.3.4 from an older version than 3.3.3 because of an update message with a link?
No. I downloaded the 3.3.4 version.


Where did you store the SEED or private keys? Online or a local file?
On a secure cloud storage.
Did you created the wallet yourself?
Yes
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April 26, 2019, 04:21:08 AM
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Where did you store the SEED or private keys? Online or a local file?
On a secure cloud storage.

that is most probably the reason why you lost your coins.
storing your most important data which you should have kept secret on an online computer is bad enough, storing it on a cloud storage is even worse. and if you didn't use a strong encryption before storing it there then it was just a matter of time before they moved the coins.

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April 26, 2019, 04:22:04 AM
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Where did you store the SEED or private keys? Online or a local file?
On a secure cloud storage.
Based from your answers, there is someone who got access to either of your SEED, wallet file backup, that transaction's particular address' private key.

Have you exported the address' private key before and pasted it in any online site or other wallet?
Does your Windows PC have an Antivirus excluding Windows Defender?
How secure is this cloud storage?
-While most of them are considered "secure" dues to encryption, it's not advisable to store the complete SEED online.

But the bottom line is, there's a very slim chance to find the culprit and almost zero chance to retrieve your bitcoins.

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April 26, 2019, 02:19:06 PM
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The most genius thing about Bitcoin in my opinion is that you can store your private keys offline, unhackable.

When you store them online, you are exposed and all your funds are compromised. Your security would be the same as any website. Look at how many accounts are hacked here every week. Your bitcoins were exposed just like that , sadly.

Uptimus_Princeps (OP)
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April 26, 2019, 03:26:23 PM
 #7

 Ouch..... I knew about the following potential vulnerabilities and so took a few countermeasures to reduce any risk.
Potential Vulnerabilities:
1)I use my organization's (university) network but with my own router which is configured to Expressvpn.
 2) I also used my organization-supplied windows 10 enterprise OS.

Countermeasures are

 1)I used expressvpn constantly via my router.
2) I have Kaspersky internet security and I routinely scan and had found no issues. 


Any critical feedback is welcome. THanks.
       
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April 26, 2019, 06:54:53 PM
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If you plan to simply hold bitcoin for long time, safely generated paper wallet could be better choice.
If you plan to spend from time to time and still keep bigger values, hardware wallet should be the key (Electrum works well with hardware wallets).
I write this because I heard quite a number of concerning things related to the (lack of) security in university networks.

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April 26, 2019, 07:47:28 PM
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If you plan to simply hold bitcoin for long time, safely generated paper wallet could be better choice.
If you plan to spend from time to time and still keep bigger values, hardware wallet should be the key (Electrum works well with hardware wallets).
I write this because I heard quite a number of concerning things related to the (lack of) security in university networks.

My university network is pretty secure though, no ones getting into that easily (even I can't most of the time as you need an 802.1x rsa certificate)...

That being said, if stupid people are in charge of security I can see where the faults will lie.

Better than hardware is if you have more than one device to sign from with 2 of 2 or 2 of 3 multisig. I use this option myself as its secure (make sure only one Intel and one arm chip are used just in case of collusion, if Intel chips are cracked, your arm chip will protect you). Arm is often in phones (like quallcoms snapdragon, or huawei processors).

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April 27, 2019, 08:48:17 AM
 #10

but I definitely don't remember doing that. How do I get my BTC back?! Any help is sincerely appreciated!

you don't remember?
aren't remember your friend borrow your laptop for campus work?
or something, don't you lock up your pc and leave it on class room?.

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April 27, 2019, 07:54:26 PM
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I'm sure there's someone knows yoru private key or seed look at the image 2 days before he transfer the bitcoin out from your wallet.

Maybe you pasted your seedphrase or private key online to any website or maybe someone in your house near you stole your bitcoin.
Because your PC is secured with 2 antivirus windows defender and Kaspersky and if you are infected with a malware or virus after you receive some bitcoin and confirmed it will automatically be transacted to another wallet in the same time if you are infected or installed fake electrum.

In your case it seems someone knows your important seed or key.

Did you share your access to someone a friend or family member to your cloud storage?

bob123
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April 29, 2019, 07:00:04 AM
 #12

Where did you store the SEED or private keys? Online or a local file?
On a secure cloud storage.

Mind telling us which cloud storage you have used ?
And did you encrypt your file which contained the seed ? Or did you store it in plain text ?

What VPN server did you use ? Did you only use the VPN to connect from your university network to your homenetwork ?
Or did you route the traffic from your home network trough a VPN server ?





My university network is pretty secure though, no ones getting into that easily (even I can't most of the time as you need an 802.1x rsa certificate)...

The certificate usually is just for the client (you) to ensure you are communicating with the correct server.

The authentication is based on WPA2-Enterprise / PEAP / MSCHAPv2 ?
If so, the certificate is just to make sure your credentials are passed to the correct RADIUS server.

If you didn't import the certificate and connect to the wrong wifi, your credentials can be read by the malicious person operating the access point.


But you should always be able to connect without the certificate (even if it is not recommended security-wise).

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