mercadobitcoin

🔴 Mercado Bitcoin, a Brazilian exchange, has paused deposits and withdrawals after wallets on at least 10 chains were emptied, with about $40 million drained, per CoinDesk. 🔍 It comes days after the reported $6.3 billion Binance hack, though no link between the two is established. Users in Brazil cannot move funds while the pause stands.

If your local exchange froze withdrawals, how would it change the way you handle P2P settlement? 👇

#mercadobitcoin #brazil #exchange #withdrawals #security

I've been watching a second exchange incident land days after Binance — this one in Brazil.

Mercado Bitcoin suspended deposits and withdrawals on Monday after a security incident in one of its systems. The exchange says no customers lost money and no data leaked — but it has not given a loss figure, named the affected system, or said when withdrawals resume.

Here's the gap: security firm Hypernative flags more than $40 million in outflows from wallets it attributes to the exchange, across at least 10 chains, calling them plain transfers, not a smart-contract exploit. Mercado Bitcoin has not confirmed that figure.

$BTC near $77,727 (-0.35% in 24h) and $ETH near $2,283 (+0.69%) on Binance spot — flat, and I won't claim this story moved that tape. No link to Binance has been established.

My doubt: even if customers are whole, whose funds moved — and how did signing access break? Until withdrawals reopen, treat "contained" as a process update, not a verdict. DYOR, not financial advice.

What proof would you want before moving funds back in?

#CryptoMarkets #MercadoBitcoin #ExchangeSecurity #BrazilCrypto #CryptoSafety

$40 MILLION CRYPTO HACK? BRAZIL'S LARGEST EXCHANGE HALTS WITHDRAWALS

🇧🇷 Mercado Bitcoin has confirmed a security breach after over $40 million in suspicious crypto outflows were reportedly detected across 10+ blockchain networks.

➡️ Deposits and withdrawals temporarily suspended.
➡️ 2,852 $ETH, 106 $BTC, 10,700 $SOL and other assets linked to suspicious wallets.
➡️ Tether reportedly froze $4.5M+ USDT connected to the incident.
➡️ Mercado Bitcoin claims no customer funds were lost and no user data was leaked.

The actual financial losses remain unconfirmed, and investigations are ongoing.
Another major reminder: Exchange security remains one of crypto's biggest risks.

#MercadoBitcoin #CryptoHack

Mercado Bitcoin has paused deposits AND withdrawals after a reported $40 million drain. 😟

CoinDesk reports wallets on at least 10 chains were emptied at the Brazilian exchange.

That scale makes me uneasy. For users, the urgent question is access to their funds—not just the headline loss. 🔒

What would you want clarified first: the extent of the losses or a withdrawal reopening timeline?

#CryptoSecurity #MercadoBitcoin

ANOTHER HACKER ATTACK!!!!!
WHAT WILL BECOME OF US AFTER THIS!!!
Insecurity takes over again after yet another possible hacker attack, with a possible crypto crash and Mercado Bitcoin going bankrupt because it does not have the same security fund as Binance.
#MERCADOBITCOIN #ATAQUEHACKER #BRASIL #CRIPTO

🚨 $40M+ HACK? BRAZIL’S LARGEST CRYPTO EXCHANGE HALTS WITHDRAWALS!

🇧🇷 Mercado Bitcoin has confirmed a cyberattack and temporarily suspended deposits and withdrawals as a security precaution.

Blockchain security firm Hypernative reportedly identified over $40 million in suspicious transfers across multiple networks.

⚠️ The exchange says customer funds remain protected, but the reported losses are not yet officially confirmed.

#CryptoHack $BTC #mercadobitcoin #CryptoNews #BinanceSquare

Mercado deep dive: $48.5M isn’t the whole story—after the exchange said it had “contained” the incident, the hacker kept sweeping funds for more than two hours

This is a follow-up filling in the gaps left in my previous post (01:38): did the total losses climb any higher, and was there a second batch of freezes? Bitquery’s just-released, transaction-by-transaction on-chain accounting answers both questions—but the added details sting more than the numbers themselves.

First, the numbers. Bitquery counted $48.5M across 10 chains, valued at the price at the time of each transfer. Ethereum alone accounted for $29.5M (188 transactions over 24 minutes), followed by Bitcoin. To be clear about the methodology: that $48.5M includes an EVA token whose one-week trading volume was less than its market cap (about $1.21M). Excluding it brings the total to $47.2M—so compared with the roughly $46.5M in my previous post, the overall figure has only risen slightly. The genuinely new information is in the two points below.

First, the exchange’s claim that it had “迅速控制” (quickly contained the incident) doesn’t line up with the on-chain timeline. Bitquery found that the hacker didn’t just access hot wallets—they could also sign transactions from customers’ deposit addresses. On Ethereum, 35,853 deposit addresses were gradually emptied starting at 12:10 UTC, with the sweep continuing until 15:44 UTC. The exchange issued its “contained” statement at 12:56 UTC—right in the middle of the busiest part of the sweep, which continued for more than two hours afterward. Another 53 deposit addresses were emptied on Bitcoin. Bitquery’s advice is blunt: stop sending funds to old deposit addresses and wait for the exchange to provide new ones.

Second, the freeze tally also checks out. Tether froze $5.9M (USDT, USDT0, USAT, and gold tokens across Polygon, Tron, Ethereum, and Solana), while Paxos froze $1.5M (PAXG and USDP), for a total of $7.3M—about 15% of the overall amount. Circle froze nothing: $4.29M in USDC/EURC remains movable. The remaining roughly 76% consists of assets such as $BTC and $ETH , which their issuers simply can’t freeze. The good news is that most of the funds haven’t moved: the hacker’s 106.07 BTC remain untouched, and the $19.5M transferred to 10 new Ethereum wallets had barely moved by 15:46 UTC. So far, there’s no sign of funds reaching an exchange.

It’s also worth clarifying what hasn’t changed: the exchange still hasn’t confirmed the total, provided a root cause, or given a recovery timeline. Deposits and withdrawals remain suspended (Bitquery’s latest check reflected the situation on Monday afternoon; this search found no official notice that services had resumed). The claim that “the exchange will absorb the losses” is still a statement attributed to it by Bloomberg; it can’t be verified on-chain. Also, Bitquery noted that the same address received about $298,000 from several unrelated wallets 53 minutes before Mercado. One Arbitrum wallet was tagged as BitMart—but BitMart hasn’t commented, and that tag is Bitquery’s own, not evidence that BitMart was hacked.

My take: the key thing to remember from this round isn’t that the figure went from 46.5 to 48.5, but the gap between the words “contained” and the on-chain timeline. A statement can be issued quickly, but containment isn’t complete until control over the signatures for deposit addresses has been regained. The next two things to watch are when the exchange provides new deposit addresses and when it resumes deposits and withdrawals.

Risk reminder: all of the above reflects on-chain tracking, not the exchange’s official loss assessment. $BTC is currently around 76994, $ETH around 2252, and $SOL around 91.92 (cross-checked against two sources at 02:41)—all within ordinary fluctuations. Don’t force a price movement narrative onto this one incident. During a developing incident, fake support accounts and fake refund links are especially likely to appear. Use only the exchange’s official channels, and don’t click “refund” links from unknown sources.

What do you think: when the exchange’s statement conflicts with the on-chain timeline, is that just a difference in reporting—or was control itself never really in place?

$BTC $ETH $SOL
#MercadoBitcoin #交易所安全 #BTC #ETH

🚨 MERCADO BITCOIN: INVESTIGATION ADVANCES AFTER SECURITY INCIDENT

New information released on 02/11/2026 indicates that approximately US$6.2 million in stablecoins may have been frozen while tracking assets associated with the incident at Mercado Bitcoin.

According to investigators cited by Cointelegraph, suspicious transactions exceeded US$46 million and involved several blockchain networks.

The exchange says customers did not suffer any losses and that no data was leaked.

⚠️ The figures are third-party estimates and do not yet represent losses officially confirmed by the company. Freezing assets also does not mean they have been definitively recovered.

Sources: https://br.tradingview.com/news/cointelegraph:f97cf7ccebc81:0/ and https://www.moneytimes.com.br/ataque-hacker-mercado-bitcoin-mb-sofre-incidente-de-us-40-milhoes-rens/

$BTC $ETH $BNB #MercadoBitcoin #SegurancaCripto #Blockchain #Stablecoins #BinanceSquare

The Brazilian exchange Mercado Bitcoin has halted withdrawals after being hacked for around $40 million.

This news may affect traders who have accounts on Mercado Bitcoin, as they may have trouble withdrawing their funds.

Exchange security is a crucial issue for all traders, since any weakness in protecting funds can result in significant losses.

How do you think exchanges should respond to hacking incidents, and what measures should they implement to prevent them?

#MercadoBitcoin #Hackeo #SeguridadEnCriptos #CryptoTrading

🚨 Binance was just hit by a $6.3 billion theft, and now Brazil’s largest exchange, Mercado Bitcoin, has been drained too. Two exchanges hit one after another in just a few days!

📌 What happened (Sources: The Block / Decrypt / Arkham)
• Starting early on 11/2, attackers moved funds from MB’s hot wallet across at least 10 chains
• Arkham estimates around $46.3 million; Hypernative estimates over $40 million
• The platform suspended deposits and withdrawals, saying customers suffered no losses and no data was leaked
• Tether has frozen over 4.5 million USDT

💡 My take
1️⃣ The funds were moved via ordinary transfers, which suggests signing permissions were compromised—not a smart contract vulnerability
2️⃣ After the Binance incident, BTC is still holding near $77,000 (CoinGecko: $76,676, 24h -1.5%). The Fear & Greed Index is at 37, and the market has become “numb”
3️⃣ Another reminder of exchange risk: don’t keep large amounts of assets on exchanges long-term. Diversify and self-custody

⚠️ The U.S. midterm elections are tonight, so volatility is already likely to be high. With the hacking news on top of that, watch your position size.

Would you still keep large amounts of assets on an exchange? Let’s talk in the comments 👇

$BTC $ETH #交易所安全 #MercadoBitcoin #CryptoMarket
These are solely my personal opinions and do not constitute investment advice

The trouble at Brazilian crypto giant Mercado Bitcoin isn’t over: after confirming a security incident on November 2 and suspending deposits and withdrawals, wallets linked to the incident were still moving funds—as if the suspension were pointless. On-chain tracking estimates that more than $46 million has flowed out across 10 blockchains, while all 106 BTC remain untouched. Tether and Circle froze only about $6.2 million, and roughly $20 million has already moved into new wallets. The exchange says customers suffered no losses and no data was leaked, but it hasn’t explained how the funds were signed out or when deposits and withdrawals will resume. Just days after Binance’s $6.3 billion case, here we go again. What do you think? #MercadoBitcoin #交易所被盗 #BTC #ETH #CryptoSecurity

This is another follow-up on Mercado Bitcoin, filling in the gap left in the previous post—not a new event, but a substantial upward revision to the frozen-asset tally.

In the previous post (03:38), we wrote that Bitquery had tallied $7.3M frozen, and that Circle had just followed up by freezing about $708,000 in USDC, bringing the list of entities doing the freezing to three: Tether, Paxos, and Circle.

In this round of research, the first figures I found from two independent trackers both put the total frozen amount at around $9.2M:

Researcher Specter’s breakdown comes to $9,169,052.38: about $3.76M in USDT, $2.96M in USDC, $1.45M in PAXG, $444,000 in USDT0, and $317,000 in XAUt, with the remainder in smaller amounts of AUSD, USAT, RLUSD, USDP, and others. Another on-chain tracker, OnchainLens, puts the figure at $9.27M across 5 addresses. The two figures differ by less than $100,000, putting them in the same ballpark—and they aren’t just two versions of the same source.

The biggest change is in USDC: in the previous post, Circle had only confirmed freezing about $708,000, while the USDC total in this breakdown is now around $2.96M. In other words, freezing continued after Circle’s move—but note that both figures are marked as tallies from November 2. I couldn’t find the exact publication time for Specter’s breakdown, so I won’t present this as something that just happened at 04:38. It’s an upward revision to the tally uncovered for the first time in this round of research; from now on, the previous post’s $7.3M figure is out of date.

Let’s do the math: using Bitquery’s rough total of $48.5M, $9.2M is about 19%, compared with around 15% for the $7.3M figure in the previous post. The frozen share has climbed from 15% to nearly 20%, but 80% of the assets are still out there. Freezing doesn’t mean recovery, and it certainly doesn’t mean deposits and withdrawals have resumed—Mercado’s deposits and withdrawals remain suspended, and the exchange still hasn’t provided a resumption timeline, confirmed the total, or explained the root cause.

Current prices (cross-checked against two sources at 04:40): $BTC approximately 76873, down about 1.29% over 24h; $ETH approximately 2247, down about 0.73%; $SOL approximately 91.15, down about 3.34%. This pullback is ordinary market fluctuation; I won’t force a connection to the Mercado situation.

My take: the rising frozen-asset tally is good news, but don’t let “another batch frozen” distract from what matters. Only two things can really change the situation: when deposits and withdrawals resume, and when the exchange itself confirms the losses. Until then, every increase in the frozen total is just progress in blocking assets—not a resolution.

Risk note: All figures above are from on-chain trackers, not an official loss assessment by the exchange. I haven’t found any information on whether the frozen assets will be returned or what process would be involved. This is not investment advice.

What do you think? With the frozen share approaching 20%, is this situation starting to wind down, or is it not over until deposits and withdrawals reopen?

#MercadoBitcoin #交易所安全 #BTC #ETH

Brazilian exchange Mercado Bitcoin experienced a security incident, and deposits and withdrawals have been temporarily suspended.

According to the official announcement, the incident occurred in the early hours of that day and was quickly detected and contained. Customers suffered no losses, and no data was leaked. The suspension of deposits and withdrawals is a precautionary measure. The team is investigating, tracking the assets, and coordinating with the relevant authorities.

Tether CEO Paolo Ardoino posted that Tether has frozen more than 4.5 million USDT connected to the incident.

The company says it will continue to provide updates. Anyone with an account involved should refer to official channels. Crypto assets carry risks, so please take care to keep your assets safe.

#安全事件 #MercadoBitcoin #Tether $USDT

Brazilian exchange Mercado Bitcoin says it will absorb the $40 million loss from the hot wallet theft, and customers won’t lose money. The attack has been contained, and the exchange is tracking the assets and cooperating with the investigation.

But the Mercado Bitcoin hacker entity flagged by Arkham still holds around $46.5 million across 46 addresses, including 3,677 $ETH . Promising to make customers whole is one thing; recovering the funds is another.

#交易所安全 #MercadoBitcoin

Mercado incident follow-up: Tether freezes over 4.5 million USDT, confirming the question mark from the previous post

This is a follow-up, not a rehash of the previous post. In the previous post (November 2, 23:38), I deliberately left some room for doubt: at the time, the Tether freeze was only a single-source rumor involving about $3.7 million, with no confirmation from the exchange or Tether, so it shouldn’t be treated as conclusive. That uncertainty has now been cleared up—Tether CEO Paolo Ardoino personally confirmed that over 4.5 million USDT related to the Mercado Bitcoin security incident has been frozen. CoinDesk published the news at 23:53 Beijing time, and Bitcoin Magazine reported the same, both citing Ardoino himself—not secondhand rumors.

First, let’s separate facts from opinions. The facts: Mercado Bitcoin is still suspending deposits and withdrawals; the company has yet to disclose total losses, identify the affected system, or provide a recovery timeline. Hypernative’s preliminary estimate of over $40 million remains a third-party estimate; the exchange has yet to confirm that figure. The 4.5 million figure is only somewhat higher than the rumor in the previous post, and “over 4.5 million” is a lower-bound figure, not an exact total. Roughly comparing it with the preliminary estimate of over $40 million, the frozen funds amount to only a little over 10%. The bulk—including the approximately 2,852 $ETH , 106 $BTC , and 10,700 $SOL , etc., previously tracked—are still in addresses associated with the attacker, according to the previous post, and there’s no word that they’ve been returned.

My take is simple: the issuer’s ability to block funds is genuinely effective, but a freeze doesn’t mean the funds have been recovered, much less that the incident is over. In the Binance case involving $6.3 billion, stablecoin issuers froze about $3 billion within 70 minutes—that was a matter of scale. In Mercado’s case, 4.5 million is just the opening move. What matters is whether there will be another round of freezes, and whether the frozen coins can ultimately be returned to the exchange. Every day deposits and withdrawals remain suspended, the assets of over 4.8 million users in Brazil (the background figure from the previous post) remain inaccessible. That’s what ordinary users should be watching most closely.

Prices at the time of publication (live checks against two sources at 00:39 Beijing time, November 3; Binance spot / OKX perpetual prices differed by ≤0.06%): $BTC was about $77,446, down 0.78% over 24 hours; $ETH was about $2,270, up 0.10% over 24 hours; $SOL was about $93.47, down 1.28% over 24 hours. The broader market barely reacted to this follow-up. Don’t take it as a reason to buy the dip.

Risk disclaimer: This is an incident follow-up, not investment advice. The freeze figure, total losses, and recovery timeline are all still subject to change. Treat any claims that funds have been “recovered” or that operations have “resumed” with skepticism until they’re confirmed.

What do you think? With exchanges having one incident after another this week, would you move large assets to a cold wallet first, or do you think the protection offered by a major exchange is enough?

#MercadoBitcoin #Tether #BTC #ETH #ExchangeSecurity

Mercado Bitcoin, one of Brazil’s largest crypto platforms, suspended deposits and withdrawals on 2/11 after its wallets were drained across at least 10 blockchains. Security firm Hypernative estimates the loss at more than $40M, four days after the Binance hack.

What we know as of 16:45 UTC:
- First suspicious movements were detected around 02:15 UTC from BTC deposit addresses, followed by most of the outflows between 06:19 and 06:53 UTC (Hypernative, via CoinDesk and BitNotícias).
- The attacker’s addresses reportedly hold around 106 $BTC , 2,852 $ETH , 10,700 $SOL , 6.7M XLM, 77,000 AVAX and 1.7M TRX, plus more than 200 other tokens.
- These were standard signed transfers, not a smart contract exploit. How the attacker gained access to the keys remains unknown.
- Paolo Ardoino (Tether) says he froze $4.5M in USDT linked to the theft.
- Mercado Bitcoin said on X that the incident is contained, with no customer losses or data leak, and published the destination addresses.

My calculation: at Binance spot prices as of 16:45 UTC, the six named assets are worth around $18M. The rest of the estimate is therefore hidden in the long list of tokens, making the final figure still uncertain.

There is no attribution at this stage, and no public evidence of a link to the TraderTraitor group accused by the FBI in the Binance attack. Two possible outcomes: if Mercado Bitcoin confirms an amount close to $40M and quickly reopens withdrawals, the incident remains isolated. If the investigation points to a shared signing tool or service provider, other platforms could be affected.

Two exchanges hit in one week: should a public audit of key management be required, just like proof of reserves?

#MercadoBitcoin #CryptoSecurity

🎯 Hacked for $40 million, and the platform covered it all itself

📰 Brazil’s Mercado Bitcoin was attacked on Monday and lost $40 million. The company pledged customers wouldn’t pay a cent

💬 In traditional finance, you can forget about that. It’s not because they’re so generous—it’s because these days, whoever makes users pay is the first to die. Paying with real money to buy trust—that’s a pretty slick move. Bitcoin is stuck at $77.5K, barely moving, and hardly any altcoins dare to take orders

🏷️ #MercadoBitcoin #交易所安全 #信任成本 #Brazil

Tether directly froze 4.5 million USDT after a security vulnerability at Brazilian exchange Mercado Bitcoin.

According to PANews and ChainCatcher, Tether CEO Paolo Ardoino confirmed the freeze in a post on X. Mercado Bitcoin said its systems experienced an incident early in the morning, but it has since identified and contained it. No customers lost funds, and no data was leaked. As a precaution, the platform suspended all deposits and withdrawals and published the affected addresses on EVM, BTC, SOL, XLM, and TRON, saying they were provided solely for tracking purposes. However, it still hasn’t disclosed the scale of the incident or said when services will resume.

4.5 million tokens is no small amount, but Tether reacted quickly and stopped them directly on-chain. $USDT is now hovering around $0.998984, down just 0.04% over the past 24 hours, while $BTC and $SOL slipped 0.61% and 1.37%, respectively. The market seems to be holding steady for now, but with deposits and withdrawals suspended and no update for a day, sentiment could turn at any moment.

The biggest problem isn’t the freeze itself—it’s the lack of clarity. Let’s see how Mercado Bitcoin explains what happens next.

#MercadoBitcoin #Tether #USDT

🚨 MERCADO BITCOIN RELEASES ADDRESSES FOR TRACKING AFTER INCIDENT

Brazilian exchange Mercado Bitcoin released wallet addresses associated with the transactions under investigation following the security incident reported on 02/11/2026 (UTC).

The addresses span different networks, including Bitcoin, Ethereum and compatible networks, Solana, Stellar, and Tron. The disclosure aims to help identify and track the transfers.

Security firm Hypernative flagged suspicious transactions totaling more than US$40 million, but the exchange has not confirmed this amount as actual losses.

The situation underscores the importance of cross-blockchain monitoring, operational transparency, and verifying official channels before moving any funds.

Source: Bitcoin Magazine — https://bitcoinmagazine.com/news/brazils-mercado-bitcoin-freezes-40-million

$BTC $ETH $SOL #MercadoBitcoin #SegurancaDigital #Blockchain #Criptomoedas #BinanceSquare

Mercado Bitcoin incident losses rise to about $46.5 million: exchange says it will absorb the losses, while deposits and withdrawals remain disabled

This is a follow-up, filling in the gap left by the previous post (00:38): that post only confirmed that Tether had frozen more than 4.5 million USDT, while the total losses were still based on Hypernative’s preliminary estimate of over $40 million. This update brings a new estimate backed by more data.

Here are the new figures: on-chain tracker Onchain Lens says addresses connected to the incident currently hold about $46.5 million in crypto assets across 46 addresses, including around 3,680 ETH, 106 BTC, and about $8 million in stablecoins. A separate estimate from Arkham analysts puts the figure at about $46 million and rising, saying old deposit addresses are still being swept and meme coins and altcoins are being sold. A note on the figures: trackers differ on the number of addresses (one version says 36, another 46), but their totals are all around $46 million. The exchange itself has yet to confirm the total, so $46.5 million is an on-chain tracking estimate, not an official loss assessment—don’t treat it as a figure announced by the exchange.

There’s also a new statement about who will cover the losses: according to Bloomberg, the exchange said it would absorb the losses itself and expects customers not to be affected. This is consistent with its earlier position that “customers will suffer no losses,” but this time Bloomberg has reported an explicit commitment to cover them. Unfortunately, deposits and withdrawals are still suspended, with no timeline for resuming them. The exchange has still not said which system was affected or whether customer funds were involved.

Compare this with the figures in the previous post and you can see how slow the progress has been: the more than 4.5 million USDT frozen by Tether accounts for less than a tenth of the $46.5 million. And a freeze doesn’t mean the funds have been recovered, let alone that deposits and withdrawals will resume. The funds are still sitting in tracked addresses, and the most immediate problem for users hasn’t changed: they still can’t move their assets.

A quick market update, based on prices checked just before publication: $BTC was around 77,028 (24h -1.40%), $ETH around 2,254 (-0.67%), and $SOL around 92.47 (-2.42%). The spread between Binance spot and OKX perpetuals was under 0.1%. The market hasn’t been sent tumbling by this incident: $BTC fell from 77,446 at 00:39 to around 77,028, which is ordinary fluctuation—don’t force a connection to this incident. One more point: neither the exchange nor the trackers have linked this Mercado incident to the approximately $6.3 billion theft from Binance on October 29. Don’t assume they were carried out by the same group.

My take: the estimate rising from $40 million to $46.5 million suggests the first tally missed a lot of the sweeping activity, and the losses are broader than initially thought. The exchange saying it will “absorb the losses itself” is a positive statement, but until it provides a timeline, it hasn’t been delivered for users. There’s only one real turning point: deposits and withdrawals resuming.

Risk warning: All figures above come from media reports and on-chain tracking; the exchange has not confirmed the total. A freeze does not mean funds have been recovered. Risks from small exchanges’ hot wallets have been flagged twice already this week. Diversify your assets and don’t keep your entire net worth on one exchange. This is not investment advice.

A quick either-or question: When an exchange has an incident and says, “I’ll absorb the losses myself,” do you believe it—or does it only count once deposits and withdrawals have actually resumed?

#MercadoBitcoin #交易所安全 #BTC #ETH