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Tópicos atuais sobre segurança da informação. A segurança informática é da responsabilidade de todos.

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Etiqueta: bitcoin

computer security, Hacking

Hackers roubam $10k de bitcoins num ciberataque

2 Maio, 2018
bitcoin-exchange-btc-e-falls-victim-ddos-attack2

Os hackers já procuravam sistemas vulneráveis há muito e, em meados de março, encontraram um alvo interessante: as escolas públicas de Leominster.

Cryptocurrency, Cryptography, vulnerability

PRNG — Múltiplas carteiras Bitcoin geradas via SecureRandom() estão vulneráveis

16 Abril, 2018
securerandom bitcoin

Múltiplas vulnerabilidades na função SecureRandom() (função para geração de números pseudo-aleatórios — PRNGs) deixam os endereços da carteira Bitcoin vulneráveis a ataques de força bruta.

Hacking

$3,3 Milhões Roubados da Coinsecure Bitcoin Wallet

13 Abril, 2018
Bitcoin_hack_lead

A Coinsecure, a segunda bolsa de valores da Índia, anunciou publicamente que sofreu uma grave violação de segurança — 3,3 milhões de bitcoins foram roubados.

computer security, Cryptocurrency

600 powerfull computers were stolen with the intent to use them for mining Bitcoin

4 Março, 2018
bitcoin mining

Thieves steal 600 powerful computers in a huge heist in Iceland with the intent to use them for mining Bitcoin.

Hacking, vulnerability

Hackers usam a vulnerabilidade zero-day do ‘Bitmessage’ para roubar carteiras Bitcoin

14 Fevereiro, 2018
bitmessage-bitcoin-hacking

Os developers do Bitmessage deixaram um alerta sobre uma vulnerabilidade crítica, uma zero-day-vulnerability, que permite a execução de código remoto na aplicação PyBitmessage, e que estava a ser explorada massivamente pelos hackers.

computer security, Cryptocurrency

Bitcoin e a sua queda desastrosa

2 Fevereiro, 2018
market-price

A criptomoeda Bitcoin caiu 30% esta semana,  a pior semana desde abril de 2013.

Cryptocurrency

Facebook Is Banning Advertisements for Bitcoin and ICOs

31 Janeiro, 2018
mwc-facebook-continues-its-quest-for-global-connectivity_sm82

Facebook has revealed a new policy that bans advertisements related to bitcoin and initial coin offerings (ICOs), among others.

Hacking, Malware, segurancainformatica

Attention, chrome extensions are mining cryptocurrency

3 Janeiro, 2018
Archive_poster

Archive Poster Malware – The Chrome store claims that the extension affects 105,000 users, and presumably everyone is mining coins in their computer through this extension running in background.

Distributed Ledger, segurancainformatica

Blockchain is becoming obsolete — The future is Hashgraph

29 Dezembro, 2017
blockchain-obsolete

A blockchain começa a ficar obsoleta comparativamente com o hashmap. O hashmap permite uma velocidade de 250.000 vezes mais rapido que a blockchain, mais barato, e a prova de trabalho (PoW) não interfere na ordem como as transações são validadas e armazenadas nos blocos da cadeia.

computer security, Distributed Ledger, segurancainformatica

A Revolução pós-Internet? Blockchain

7 Setembro, 2017
blockchain-technology-

A blockchain apresenta-se como uma tecnologia totalmente revolucionária e que mudará para sempre a forma como os negócios operam. Esta é uma grande mudança. A…

computer security, Distributed Ledger, segurancainformatica

Blockchain e Casos de Uso

5 Setembro, 2017
biometric_blockchain_bitcoin

A blockchain e a segurança na transparência vai muito para além da realidade financeira. Introduzido com o bitcoin em 2009, esta tecnologia apresenta-se como uma…

computer security, Distributed Ledger, segurancainformatica

Blockchain and Merkle Tree

3 Agosto, 2017
blockchain_transactions_diagram_1

Blockchain O bitcoin é o nome de batismo de uma criptomoeda que teve um enorme impacto quando foi libertada na Internet e também todo o…

computer security, Distributed Ledger, segurancainformatica

A Revolução da Blockchain – A Tecnologia do Futuro

19 Julho, 2017
Blockchain-Image-3

Desde o ínicio do ano de 2009 que uma moeda virtual tem vindo a marcar a diferença no horizonte dos pagamentos digitais. O principal ingrediente…

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    Author – Founder

    pedro tavares

    Pedro Tavares is a professional in the field of information security working as an Ethical Hacker/Pentester, Malware Researcher and also a Security Evangelist. He is also a founding member at CSIRT.UBI and Editor-in-Chief of the security computer blog seguranca-informatica.pt.

    In recent years he has invested in the field of information security, exploring and analyzing a wide range of topics, such as pentesting (Kali Linux), malware, exploitation, hacking, IoT and security in Active Directory networks.  He is also Freelance Writer (Infosec. Resources Institute and Cyber Defense Magazine) and developer of the 0xSI_f33d – a feed that compiles phishing and malware campaigns targeting Portuguese citizens.

    Read more here.

    Newsletter

    #0xSI_f33d

    The Portuguese Abuse Open Feed

    si_f33d
    @ VirusTotal offical ingestor

    Add a new phishing / malware campaing into 0xSI_f33d

    Infographic – Threat Report Portugal Q2 2022

    si_f33d

    Download [PDF] or [PNG]

    Taking the bait: The modus operandi of massive social engineering waves impacting banks in Portugal

    clickthebait

    The new maxtrilha trojan is being disseminated and targeting several banks

    maxtrilha

    The clandestine Horus Eyes RAT: From the underground to criminals’ arsenal

    qbot

    A taste of the latest release of QakBot

    qbot

    Javali trojan weaponizing Avira antivirus legitimate injector

    javali

    Anubis Network – The evolution of the Phishing schema

    anubis

    Threat analysis: The emergent URSA trojan impacts many countries using a sophisticated loader

    ursa

    In-depth analysis of a trojan banker impacting Portugal and Brazil

    trojan_portugal_and_Brazil

    Grandoreiro malware May 2020 – Portugal

    The updated Grandoreiro Malware equipped with latenbot-C2 features in Q2 2020 now extended to Portuguese banks

    grandoreiro_portugal_2020

    Brazilian trojan banker is targeting Portuguese users using browser overlay

    predictions

    Trojan Lampion – Portugal

    predictions

    New release of Lampion trojan spreads in Portugal with some improvements on the VBS downloader

    lampion

    Banking Phishing Portugal

    Banking Phishing | Targets Portugal, Spain, Brazil and Chile | From Brazil | Infection process

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